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List of works by Gary Ferland

A Cloudy/XSPEC interface

A Practical Guide to the Partition Function of Atoms and Ions

scientific article published on 18 July 2022

A bare molecular cloud at z ~ 0.45

scientific article published in January 2010

A bright molecular core in a Crab nebula filament

scientific article published in January 2010

A complete model helium atom: theoretical emissivities, the case B approximation, and the primordial helium abundance

A deep spectroscopic study of the filamentary nebulosity in NGC 4696, the brightest cluster galaxy in the Centaurus cluster

scholarly article

A magnetically supported photodissociation region in M17

scientific article published in January 2007

A masing [Fe XI] line

scientific article published in January 1993

A molecular absorption line survey towards the AGN of Hydra-A

scientific article published on 28 May 2020

A multi-instrument study of the Helix nebula knots with the Hubble Space Telescope

scientific article published in January 2005

A multiwavelength study of Nova QU Vulpeculae 1984

scientific article published in the Astrophysical Journal

A photon dominated region code comparison study

scientific article published in January 2007

A sea change in eta Carinae

scientific article published in January 2010

A search for weak interstellar lines

scholarly article

A survey for small-amplitude variability among population II stars

scholarly article

A survey of molecular hydrogen in the Crab nebula

scientific article published in January 2011

A young solar twin in the Rosette cluster NGC 2244 line of sight

scientific article published in January 2018

AGN STORM 2. I. First results: A Change in the Weather of Mrk 817

AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy

scientific article published in October 2024

AGN STORM 2. VI. Mapping Temperature Fluctuations in the Accretion Disk of Mrk 817

scholarly article

Abell 39 - a benchmark planetary nebula for numerical modeling

Accurate determination of the free-free Gaunt factor - I. Non-relativistic Gaunt factors

scientific article published in January 2014

Accurate determination of the free-free Gaunt factor - II. Relativistic Gaunt factors

scientific article published in January 2015

Accurate hydrogen spectral simulations with a compact model atom

scientific article published in January 1997

An X-ray model for the nebula of nova DQ Herculis 1934

scientific article published in January 1981

An accretion event in the Seyfert galaxy NGC 5548

scholarly article

An electron scattering screen in the inner regions of Seyfert galaxies

scholarly article in Bulletin of the American Astronomical Society, vol. 21, 1989

An open source atomic physics toolkit: first applications to HeI recombination lines

Anisotropic line emission and the geometry of the broad-line region in active galactic nuclei

scientific article published in January 1992

Are there any shock-heated galaxies ?

Atomic data and spectral model for Fe II

scientific article published in the Astrophysical Journal

Atomic data for S II--Toward better diagnostics of chemical evolution in high-redshift galaxies

scientific article published in January 2014

Atomic data for Zn II: improving spectral diagnostics of chemical evolution in high-redshift galaxies

scholarly article

Atomic data for astrophysics. I. Radiative recombination rates for H-like, He-like, Li-like, and Na-like ions over a broad range of temperature

scientific article published in January 1996

Atomic data for astrophysics. II. New analytic fits for photoionization cross sections of atoms and ions

scientific article published in January 1996

Atomic data revisions for transitions relevant to observations of interstellar, circumgalactic, and intergalactic matter

scientific article published in January 2017

Bootstrapping dielectronic recombination from second-row elements and the Orion nebula

scientific article published in January 2015

Broad Ne VIII Lambda-774 emission from the quasar PG 1148+549

scientific article published in January 1995

CLOUDY 90: numerical simulation of plasmas and their spectra. (Invited review)

Carbon monoxide emission and the eta Carinae stage of Nova NQ Vulpeculae

Charge transfer between neutral atoms and highly ionized species: implications for ISO observations

scientific article published in January 1997

Chemical abundances in broad emission line regions: the ``Nitrogen-loud'' quasi-stellar object Q0353-383

scholarly article

Classification and analysis of emission-line galaxies using mean field independent component analysis

scientific article published in January 2013

Close-coupling calculations of low-energy inelastic and elastic processes in 4He collisions with H2: A comparative study of two potential energy surfaces

scientific article published on 01 January 2005

Cloudy 96

scholarly article

Cold gas dynamics in Hydra-A: evidence for a rotating disc

article

Collisional effects in He I : an observational analysis

scientific article published in January 1995

Collisional effects in the helium triplets and the primordial helium abundance

scientific article

Collisional excitation of [C II], [O I] and CO in massive galaxies

scholarly article

Collisional heating as the origin of filament emission in galaxy clusters

scientific article published in January 2009

Commentary on: Arnaud M. and Rothenflug R., 1985, A&AS, 60, 425, 1985A&AS...60..425A. The ionization balance of a non-equilibrium plasma

scientific article published in January 2009

Constraining cold accretion on to supermassive black holes: molecular gas in the cores of eight brightest cluster galaxies revealed by joint CO and CN absorption

scientific article published on 2 August 2019

Continuous absorption of He I lambda 10830 in planetary nebulae

scientific article published in January 1993

Continuum pumping of [Fe II] in the Orion nebula

scientific article published in January 2000

Continuum pumping of [Fe II] in the Orion nebula

scholarly article

Critical differences and clues in eta Car's 2009 event

scientific article published in the Astrophysical Journal

Deep and narrow CO absorption revealing molecular clouds in the Hydra-A brightest cluster galaxy

scientific article

Detecting the rapidly expanding outer shell of the Crab nebula: where to look

scholarly article

Detection of optical coronal emission from 10^6^-K gas in the core of the Centaurus cluster

scientific article published in January 2011

Determination of the physical conditions of the knots in the Helix Nebula from optical and infrared observations

scientific article published in January 2007

Determining the H^+^ region/ PDR equation of state in star-forming regions

scientific article published in January 2006

Dirac-Fock energy levels and transition probabilities for oxygen-like Fe XIX

scientific article published in January 2004

Discovery of atomic and molecular mid-infrared emission lines in off-nuclear regions of NGC 1275 and NGC4696 with the Spitzer Space Telescope

scientific article published in January 2007

Donald E. Osterbrock (1924-2007)

scientific article published in January 2007

Effects of external radiation fields on line emission--Application to star-forming regions

scientific article published in January 2013

Electron-impact excitation of OII fine-structure levels

scientific article published in January 2009

Emission line ratios of Fe III as astrophysical plasma diagnostics

Emission line variations of nova V1500 Cygni and the structure of the central object

scientific article published in January 1980

Emission‐Line Helium Abundances in Highly Obscured Nebulae

scholarly article

Energy levels and transition probabilities for boron-like Fe XXII

scientific article published in January 2006

Energy levels and transition probabilities for nitrogen-like Fe XX

scientific article published in January 2005

Evidence for fluorescent Fe II emission from extended low ionization outflows in obscured quasars

Evidence for photoionization-driven broad absorption line variability

scientific article published in the Astrophysical Journal

Expanded iron UTA spectra --Probing the thermal stability limits in AGN clouds

scientific article published in January 2013

Expanding cloudy with third-party databases

scientific article published in 2008

Fe <scp>iii</scp> emission in quasars: evidence for a dense turbulent medium

scientific article published on 15 June 2020

Fine-structure lines and the 10 micron excess of Nova Cygni 1975

Fluorescent excitation of Balmer lines in gaseous nebulae: case D

Grain size distributions and photoelectric heating in ionized media

scholarly article

Grains in ionized nebulae. II. Heavy-element depletion

scientific article published in January 1997

Grains in ionized nebulae: spectral line diagnostics

scientific article

Grains in ionized nebulae: spectral line diagnostics

H, He-like recombination spectra - I. l-changing collisions for hydrogen

scientific article published in January 2016

H-, He-like recombination spectra - II. l-changing collisions for He Rydberg states

scientific article published in January 2017

H-, He-like recombination spectra – III. n-changing collisions in highly excited Rydberg states and their impact on the radio, IR, and optical recombination lines

scientific article

HST imaging of the dusty filaments and nucleus swirl in NGC4696 at the centre of the Centaurus Cluster

scholarly article

H_2_ temperatures in the Crab Nebula

scientific article published in January 2012

He I 2.06 micron emission from nebulae

scientific article published in January 1999

He I emission in the Orion nebula and implications for primordial helium abundance

scientific article published in January 2007

He II reverberation in active galactic nucleus spectra

scientific article published in January 2002

He/H ratio for cosmology: accurate He recombination coefficients including fine structure and singlet-triplet mixing

scientific article published in January 2003

He/H ratio for cosmology: accurate He recombination coefficients including fine structure and singlet-triplet mixing

scientific article published in January 2002

He1 lam 584 in quasars and gaseous nebulae

scientific article published in January 1980

Heavy element abundances of Nova Cygni 1975

scientific article

Helium abundance in ejecta from CP Lacertae and V446 Herculis

scientific article published in January 1979

Herschel dust emission as a probe of starless cores mass: MCLD 123.5+24.9 of the Polaris flare

scientific article published in January 2015

Herschel images of NGC 6720: H_2_ formation on dust grains

scientific article published in January 2010

Herschel observations of extended atomic gas in the core of the Perseus cluster

article

Herschelobservations of FIR emission lines in brightest cluster galaxies

scientific article published in Astronomy and Astrophysics

Herschelphotometry of brightest cluster galaxies in cooling flow clusters

scientific article published in Astronomy and Astrophysics

Herschel★ observations of the Centaurus cluster - the dynamics of cold gas in a cool core

article

High Metal Enrichments in Luminous Quasars

scientific article published in the Astrophysical Journal

High-excitation emission lines near eta Carinae, and its likely companion star

scientific article published in the Astrophysical Journal

High-ionization emission-line ratios from quasar broad-line regions: metallicity or density?

scientific article published on 03 June 2021

High-resolution spectroscopy of faint emission lines in the Orion nebula

scholarly article

Hot gas and the origin of the nebular continuum in novae

scientific article published in January 1994

Hubble space Telescope/Faint object spectrograph spectroscopy of spatially resolved narrow-line regions in the Seyfert 2 galaxies NGC 2110 and NGC 5929

scientific article published in January 1999

Hydrogen emission from low column density gas: case C

scientific article

Hydrogen emissivity in realistic nebulae : the effects of velocity fields and internal dust

Hydrogen two-photon continuum emission from the horseshoe filament in NGC 1275

scientific article published in January 2012

Hydrogenic emission and recombination coefficients for a wide range of temperature and wavelength

Hyperfine structure emission and absorption lines in hot gas

scientific article

IUE observations of DQ Herculis and its nebula, and the nature of the cold nova shells

scientific article published in January 1984

IUE spectra and a resulting model of Seyfert 2 galaxies

scientific article published in January 1986

Implications of Ca II emission for physical conditions in the broad-line region of active galactic nuclei

Implications of Lyman continuum observations of quasars

scientific article published in January 1988

Implications of Lyman-alpha equivalent widths in active galactic nuclei

scientific article published in January 1993

Implications of coronal line emission in NGC 4696

scientific article published in January 2015

Implications of infalling Fe II-emitting clouds in active galactic nuclei: anisotropic properties

Implications of nonlinear line response in variable Seyfert nuclei

Improved He I emissivities in the case B approximation

scientific article published in January 2012

Inner-shell photoexcitation of FeXV and FeXVI

scientific article published in January 2003

Intensive disc-reverberation mapping of Fairall 9: first year of <i>Swift</i> and LCO monitoring

scientific article published on 16 September 2020

Intermediate-line Emission in AGNs: The Effect of Prescription of the Gas Density

scholarly article published on 20 March 2018

Interpreting the ionization sequence in AGN emission-line spectra

scientific article

Interpreting the ionization sequence in star-forming galaxy emission-line spectra

scientific article

Intervening broad-line region clouds' effects on the optical/ultraviolet spectrum

scientific article published in January 2012

Ion-by-ion cooling efficiencies

scientific article published in January 2012

J-resolved He I emission predictions in the low-density limit

scholarly article

Line-driven radiative outflows in luminous quasars

scientific article published in January 2014

Locally optimally emitting clouds and the narrow emission lines in Seyfert galaxies

Magnetic confinement, magnetohydrodynamic waves and smooth line profiles in active galactic nuclei

scientific article published in January 2000

Magnetic fields and the location of the PDR

scientific article published in 2008

McDonald Observatory - Hubble Space Telescope spectroscopy of the narrow line region of high kuminosity active galactic nuclei

scientific article published in January 1993

Measurement and interpretation of deuterium-line emission in the Orion Nebula

scientific article

Merged ionization/dissociation fronts in planetary nebulae

scientific article published in January 2007

Metallicities and abundance ratios from quasar broad emission lines

scientific article published in January 2002

Modeling X-ray Ionization of Grains with Cloudy

scientific article published in 2008

Molecular hydrogen at high-z: physical conditions in protogalaxies

Molecular hydrogen in star-forming regions: implementation of its microphysics in CLOUDY

scientific article published in January 2005

Multiphase signatures of active galactic nucleus feedback in Abell 2597

scholarly article

Multiwavelength studies of classical nova shells

scientific article published in January 1991

N II lambda lambda 5668-5712: a new class of spectral features in eta Carinae

scientific article

NGC 6302: ionized by a very hot star or by a wind ?

scientific article published in January 1991

Nebular properties and the ionizing radiation field in the Galactic Center

scholarly article

New Results on Quasar Outflows

scholarly article

Newly Improved Ionization Corrections for the Neutral Interstellar Medium: Enabling Accurate Abundance Determinations in Star-forming Galaxies throughout the Universe

scientific article published in 2020

Nova shells : matter-bound or radiation-bound ?

scientific article

Numerical simulations of Fe II emission spectra

scientific article published in January 1999

Observations of 3C 390.3 with the International Ultraviolet Explorer

scientific article

On nitrogen abundances of planetary nebulae

scientific article published in January 1981

On the Intermediate Line Region in AGNs

scientific article published on 29 September 2017

On the carbon composition of the ejecta of DQ Herculis

scientific article published in January 1980

On the distance and luminosity of nova DQ Herculis

scientific article published in January 1980

On the enhanced cosmic-ray ionization rate in the diffuse cloud toward {zeta} Persei

scientific article published in January 2008

On the observability of optically thin coronal hyperfine structure lines

scientific article published in January 2014

On the rapid emission-line variations in IC 4997

scientific article

Optically thick [O I] and [C II] emission toward NGC 6334A

Optically thin broad-line clouds in active galactic nuclei

scientific article published in January 1995

Optically thin thermal emission as the origin of the big bump in the spectra of active galactic nuclei

scientific article published in January 1990

Orion's bar: physical conditions across the definitive H^+^/H^0^/H_2_Interface

Orion's veil. IV. H_2_ excitation and geometry

scientific article published in January 2016

Outline of a moral policy on the care of the dying in hospital surroundings

scientific article published on 01 January 1979

PW Vulpeculae - A nova with nearly solar abundances

scientific article published in the Astrophysical Journal

Periodicities an rapid line variability in Nova V1500 Cygni 1975

Phonophoresis versus ultrasound in the treatment of common musculoskeletal conditions

scientific article published on September 1, 1998

Photoelectric differential photometry of the contact binary AW UMa

scientific article published in January 1976

Photoelectric measurements of lunar occultations. VIII

scientific article published in January 1976

Photoerosion and the abundances of the light elements

scholarly article

Photoerosion of nuclei in quasar emission-line regions

scientific article published in January 1987

Physical conditions in Barnard's loop, components of the Orion-Eridanus Bubble, and implications for the warm ionized medium component of the interstellar medium

scientific article published in the Astrophysical Journal

Physical conditions in Orion's veil

scientific article published in January 2004

Physical conditions in low ionization regions of the Orion nebula

Physical conditions in orion's lid

scientific article published in January 2003

Physical conditions in orion's veil. II. A multicomponent study of the line of sight toward the Trapezium

scientific article

Physical conditions in the Orion H II region

Physical conditions in the Orion nebula and an assessment of its helium abundance

scientific article published in January 1991

Physical conditions in the accretion disk of V603 Aquilae

scholarly article

Physical conditions in the interstellar medium toward HD 185418

scientific article published in January 2006

Physical conditions of the coronal line region in Seyfert galaxies

scientific article published in January 1997

Properties of Dust Grains in Planetary Nebulae. I. The Ionized Region of NGC 6445

scientific article published in the Astrophysical Journal

Pumping up the [N i] nebular lines

scholarly article

Quantitative spectroscopy of photoionized clouds

scholarly article

Quantitative spectroscopy of starbursts and quasar emission line regions

scientific article published in January 1997

Radiation pressure and emission clouds around active galactic nuclei

scientific article published in January 1986

Radiative cooling II: effects of density and metallicity

scientific article published in January 2014

Radiative cooling in collisionally ionized and photoionized plasmas

scientific article published in January 2013

Radiative equilibrium of high-density clouds with application to active galactic nucleus continua

scientific article published in January 1988

Rate coefficients for charge transfer between hydrogen and the first 30 elements

scientific article published in January 1996

Relativistic allowed and forbidden transition probabilities for fluorine-like Fe XVIII

scholarly article

Residual cooling and persistent star formation amid active galactic nucleus feedback in Abell 2597

scholarly article

Revisiting He-like X-ray emission-line plasma diagnostics

scholarly article

Revisiting the torus: spectral predictions from the IR to the X-ray

Role of Polycyclic Aromatic Hydrocarbons on the Cosmic-Ray Ionization Rate in the Galaxy

scientific article published in 2021

Rotational quenching rate coefficients for H_2_ in collisions with H_2_from 2 to 10,000 K

Rotationally warm molecular hydrogen in the Orion Bar

scholarly article

Rovibrationally resolved direct photodissociation through the Lyman and werner transitions of H_2_ for FUV/X-ray-irradiated environments

scientific article

Self-consistent dynamic models of steady ionization fronts. I. Weak-D and weak-R fronts

scholarly article

Sensitivity of PDR calculations to microphysical details

scientific article published in January 2008

Space Telescope and Optical Reverberation Mapping Project. IX. Velocity–Delay Maps for Broad Emission Lines in NGC 5548

scientific article published in 2021

Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548

scientific article published in the Astrophysical Journal

Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the Ultraviolet Anomaly in NGC 5548 with X-Ray Spectroscopy

scientific article published in the Astrophysical Journal

Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

scholarly article

Space Telescope and Optical Reverberation Mapping Project. X. Understanding the absorption-line holiday in NGC 5548

Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548

scientific article published in 2020

Space telescope and optical reverberation mapping project. IV. Anomalous behavior of the broad ultraviolet emission lines in NGC 5548

scientific article published in the Astrophysical Journal

Spectroscopic observations of Nova Cygni 1975: detection of diffuse enhanced spectrum

scientific article published in January 1977

Spectroscopic observations of nova Cygni 1975 : the coronal line region revisited

scientific article published in January 1986

Spectroscopic signatures of star formation in damped ly{alpha} absorbers

scientific article published in January 2004

Spitzer reveals what is behind orion's bar

scientific article

Star formation in self-gravitating disks in active galactic nuclei. I. Metallicity gradients in broad-line regions

scientific article published in January 2011

Star formation in self-gravitating disks in active galactic nuclei. II. Episodic formation of broad-line regions

scientific article published in the Astrophysical Journal

State-specific hydrogenic recombination cooling coefficients for a wide range of conditions

scientific article

State-to-state rotational transitions in H2+H2 collisions at low temperatures

scientific article published on 01 September 2006

Stimulated emission and the flat Balmer decrements of cataclysmic variable stars

Stout: cloudy's atomic and molecular database

scholarly article

Strong variability of the coronal line region in NGC 5548

scholarly article

Structure and feedback in 30 Doradus. I. Observations

Structure and feedback in 30 Doradus. II. Structure and chemical abundances

scientific article

Structure and physical conditions in the Huygens region of the Orion nebula

scholarly article

Studies of NGC 6720 with calibrated HST/WFC3 emission-line filter images. I. Structure and evolution

scientific article

Studies of NGC 6720 with calibrated HST/WFC3 emission-line filter images. II. Physical conditions

scholarly article

Studies of NGC 6720 with calibrated HST/WFC3 emission-line filter images. III. Tangential motions using AstroDrizzle images

scientific article published in January 2013

Suppression of dielectronic recombination due to finite density effects

scientific article published in January 2013

Suppression of dielectronic recombination due to finite density effects. II. Analytical refinement and application to density-dependent ionization balances and AGN broad-line emission

scientific article published in January 2018

SwiftMonitoring of NGC 4151: Evidence for a Second X-Ray/UV Reprocessing

scientific article published in the Astrophysical Journal

T_e_ fluctuations and N^+^/O^+^ in the Orion Nebula

Temperature fluctuations in photoionized nebulae

scientific article

Temperature fluctuations in photoionized nebulae. II. The effect of inhomogeneous abundances

scientific article published in January 1998

Temperature variations and N+/O+ in the Orion Nebula. II. The collision strengths

scientific article published in January 2001

Temperature variations and N/O in the Orion nebula from HST observations

scientific article published in January 1998

Temperature variations from HST imagery and spectroscopy of NGC 7009

scholarly article

Temperature variations from HST imagery of NGC 7009

Temperature variations from HST spectroscopy of NGC 1976

scientific article published in January 2003

Temperature variations from Hubble Space Telescope imagery and spectroscopy of NGC 7009

scientific article published in January 2002

Temperature variations from Hubble Space Telescope spectroscopy of the Orion Nebula

scholarly article

Testing atomic collision theory with the two-photon continuum of astrophysical nebulae

scientific article

The - spectra of active galactic nuclei

scientific article published in January 1983

The 2013 Release of Cloudy

scholarly article

The Carbon and Nitrogen Abundance Ratio in the Broad Line Region of Tidal Disruption Events

scientific article published in the Astrophysical Journal

The H II Region/PDR connection: self-consistent calculations of physical conditions in star-forming regions

scientific article

The HeI isoelectronic sequence in cloudy: X-ray diagnostics

scientific article published in January 2002

The HeI isoelectronic sequence in cloudy: comparison with observations

scientific article published in January 2003

The Helium abundance of ejecta from V1500 Cygni (Nova Cygni 1975)

scientific article

The Hubble Space Telescope sample of radio-loud quasars : the Lyman-alpha/H-beta ratio

scientific article

The Hubble Space Telescope sample of radio-loud quasars : ultraviolet spectra of the first 31 quasars

The Ne III - O II spectrum as an ionization indicator in nebulae

scientific article published in January 1991

The Origin of Fe ii Emission in Active Galactic Nuclei

scientific article (publication date: 10 November 2004)

The PG X-Ray QSO Sample: Links between the Ultraviolet–X-Ray Continuum and Emission Lines

scientific article published in the Astrophysical Journal

The Primordial Helium Abundance: Toward Understanding and Removing the Cosmic Scatter in thedY/dZRelation

scientific article published in the Astrophysical Journal

The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman α systems: physical conditions in the neutral gas

scholarly article

The collision strength of the [NeV] infrared fine-structure lines

scholarly article

The coronal line region of nova QU Vul 1984

scientific article published in January 1992

The curious conundrum regarding sulfur abundances in planetary nebulae

scientific article published in the Astrophysical Journal

The curious conundrum regarding sulfur and oxygen abundances in planetary nebulae

The effect of telluric absorption on the intensity of He I 10830

scientific article published in January 1991

The effects of charge transfer on the thermal equilibrium of photoionized nebulae

scientific article published in January 1999

The effects of low-temperature dielectronic recombination on the relative populations of the Fe M-shell states

The energy source of the filaments around the giant galaxy NGC 1275

scholarly article

The first spectroscopic dust reverberation programme on active galactic nuclei: the torus in NGC 5548

scientific article

The hydrodynamics of photoionized flows

scientific article published in January 2002

The hydrogen line spectra of narrow-line radio galaxies

scientific article published in January 1985

The impact of recent advances in laboratory astrophysics on our understanding of the cosmos

scientific article published on 22 February 2012

The intermediate-line region in active galactic nuclei

scientific article published in January 2016

The interstellar reddening and distance of Nova Cygni 1975 (V1500 Cygni)

scholarly article

The line continuum luminosity ratio in active galactic nuclei: or, on the "Baldwin effect"

The location and kinematics of the coronal-line emitting regions in active galactic nuclei

scholarly article

The mass of quasar broad emission line regions

scientific article published in January 2003

The mystery of the missing boundary layer

scholarly article

The narrow-line region in the Seyfert 2 galaxy NGC 3393

scholarly article

The narrow-line region of high-luminosity active galactic nuclei

The nature and frequency of outflows from stars in the central Orion Nebula Cluster

scientific article published in January 2015

The nature of the H2-emitting gas in the Crab nebula

scientific article

The optical-ultraviolet-gamma-ray spectrum of 3C 279

The origin of N III lambda 990 and C III lambda 977 emission in AGN narrow-line region gas

The origin of NIII lambda 990 and CIII lambda 977 emission in NGC 1068

scholarly article

The origin of coronal lines in Seyfert galaxies

scientific article published in January 1989

The origin of molecular hydrogen emission in cooling-flow filaments

scientific article

The physical conditions within dense clouds in cooling flows

scientific article published in January 1994

The physical conditions within dense cold clouds in cooling flows - II

scientific article published in January 2002

The shell phase in Nova Cygni 1975

scientific article published in January 1977

The structure of the Homunculus. II. Modeling the physical conditions in {eta} Carinae's molecular shell

scientific article published in January 2007

The three-dimensional dynamic structure of the inner Orion nebula

scientific article published in January 2009

The ultraviolet and optical emission-line spectrum of III Zw 77

scientific article published in January 1987

The validity of 21 cm spin temperature as a kinetic temperature indicator in atomic and molecular gas

Theoretical He I emissivities in the case B approximation

scientific article published in January 2005

Theoretical He I line intensities in gaseous nebulae : NGC 1976, 6572 and IC 4997

scholarly article

Towards converged electron-impact excitation calculations of low-lying transitions in Fe ii

scientific article

Two-component structure of the h{beta} broad-line region in quasars. I. Evidence from spectral principal component analysis

scientific article published in January 2012

Two-photon transitions and continuous emission from hydrogenic species

Ultraviolet emission lines of Si II in cool star and solar spectra

scholarly article

Ultraviolet emission lines of Si II in quasars: investigating the "Si II disaster"

scholarly article

Ultraviolet spectroscopy of old novae and symbiotic stars

scientific article

Uncertainties in theoretical HeI emissivities: HII regions, primordial abundance and cosmological recombination

scientific article published in January 2009

Variability of the coronal line region in NGC 4151

scientific article published in January 2015

Very High Density Clumps and Outflowing Winds in QSO Broad-Line Regions

scientific article published in the Astrophysical Journal

Very luminous objects

scientific article

What heats the hot phase in active nuclei?

Which stars are ionizing the Orion Nebula?

scientific article published in January 2017

X-Ray Spectroscopy in the Microcalorimeter Era. II. A New Diagnostic on Column Density from the Case A to B Transition in H- and He-like Iron

scientific article published in September 2020

[Fe IV] in the Orion nebula

^12^C/^13^C ratio in planetary nebulae from the IUE archives

osmic rays and the emission-line regions of active galactic nuclei

scientific article published in January 1984