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List of works by Gordon Walker

13.9 - Minute periodicity in X Persei (3U 0352+30?)

scientific article published in January 1976

131 Tau : another lambda Bootis star with a shell

scientific article published in January 1994

36 Ophiuchi AB: Incompatibility of the Orbit and Precise Radial Velocities

scholarly article

A Ca II {lambda} 8662 index of chromospheric activity: the case of 61 Cygni A

A Multiwavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution

scientific article published in the Astrophysical Journal

A New Cataclysmic Variable in Hercules

scientific article published in December 2004

A Planetary Companion to γ Cephei A

scientific article published in the Astrophysical Journal

A Search for TeV Gamma‐Ray Emission from High‐peaked Flat‐Spectrum Radio Quasars Using the Whipple Air Cerenkov Telescope

scientific article published in the Astrophysical Journal

A Survey of Unidentified EGRET Sources at Very High Energies

scientific article published in the Astrophysical Journal

A coincidence between a hydrocarbon plasma absorption spectrum and the {lambda}5450 DIB

scientific article published in January 2010

A low-amplitude periodicity in the radial velocity and chromospheric emission of beta Geminorum

scientific article published in January 1993

A nonradial pulsation model for the rapidly rotating delta Scuti star kappa2 Bootis

scientific article published in January 1991

A precise radial-velocity determination of the orbit of chi1 Orionis

A precisely aligned CCD mosaic

scientific article

A search for p-modes and other variability in the binary system 85 Pegasi using MOST photometry

scientific article published in Astronomy and Astrophysics

A search for rapid spectral variations in 10 Lacertae

scholarly article

A search for substellar companions to solar-type stars

scientific article published in the Astrophysical Journal in August 1988

A solar system next door

scientific article published in Nature

A versatile CCD wave front curvature sensor

Alpha Orionis

scholarly article

An Upper Limit on the Albedo of HD 209458b: Direct Imaging Photometry with theMOSTSatellite

scientific article published in the Astrophysical Journal

An empirical H-gamma luminosity calibration for class V-III stars

scientific article published in January 1985

Assignment of 5069 {AA} diffuse interstellar band to HC_4_H^+^: disagreement with laboratory absorption band

scientific article published in January 2011

Asteroseismic analysis of the Pre-Main-Sequence stars in NGC 2264

scientific article published in the Astrophysical Journal

Asteroseismology of hybrid pulsators made possible: simultaneous MOST space photometry and ground-based spectroscopy of {gamma} Peg

BVR area photometry of M 15

scientific article published in January 1978

CCD photometry of Markarian 421 and 501

scientific article

Carbon, nitrogen and oxygen abundances in G8-K3 giant stars

scientific article

Confirmation of the planet hypothesis for the long-period radial velocity variations of β Geminorum

scientific article (publication date: October 2006)

Constraints on the Very High Energy Emission from BL Lacertae Objects

scientific article published in the Astrophysical Journal

Delta Scuti variables : detection of high-degree modes by time series analysis

scientific article published in January 1991

Detection of C3in Diffuse Interstellar Clouds

scientific article published in the Astrophysical Journal

Detection of Long‐Period Variations in the Subdwarf B Star PG 0101+039 on the Basis of Photometry from theMOSTSatellite

scientific article published in the Astrophysical Journal

Detection of T[CLC]e[/CLC]V Gamma Rays from the BL Lacertae Object 1ES 1959+650 with the Whipple 10 Meter Telescope

scientific article published in the Astrophysical Journal

Detection of high-degree nonradial pulsations in gamma Bootis

scientific article

Detection of interstellar C_3_ in the spectra of {zeta} Ophiuchi, 20 Aquilae, and {zeta} Persei

scientific article published in January 2000

Detection of radial and non-radial oscillations in MOST photometry of zeta Ophiuchi

scientific article

Detection of radial velocity variations in the rapidly oscillating Ap star HR 1217

scientific article published in January 1987

Detection of radial velocity variations in the rapidly oscillating Ap star HR 1217

scientific article

Detection of solar-like oscillations in the red giant star ϵ Ophiuchi by MOST spacebased photometry

scientific article published in Astronomy and Astrophysics

Differential Rotation of the Active G5 V Star κ1Ceti: Photometry from theMOSTSatellite

Differential Rotation of ε Eridani Detected byMOST

scientific article published in the Astrophysical Journal

Differential interstellar polarization in the region of 6284 A for HD 183143

Digital television and precision spectroscopy with the McKellar spectrograph in the 1970s

scientific article published in January 2008

Direct imaging of faint stellar companions

Direct imaging photometry with the MOST satellite

scientific article

Discovery of high-degree nonradial oscillations in rapidly rotating delta Scuti stars ?

scientific article published in January 1987

Discovery of the New Slowly Pulsating B Star HD 163830 (B5 II/III) fromMOSTSpace-based Photometry

scientific article published in the Astrophysical Journal

Discovery of the strongly eccentric, short-period binary nature of the B-type system HD 313926 by the MOST satellite

scientific article published in January 2007

Doppler searches for planetary systems

Eclipsing binaries in the MOST satellite fields

Equivalent widths and halfwidths of the lambda 4388 and lambda 4471 HeI lines, rotational velocities and lambda 4430 central depths for 450O to B5 stars

scientific article

Evidence for Planet‐induced Chromospheric Activity on HD 179949

scientific article published in the Astrophysical Journal

Evidence for a Long-Period Planet Orbiting ε Eridani

scientific article published in December 2000

From I see to IC: the perfection of astronomical detectors. (Millennium essay)

scientific article

Further evidence for carbon isotopic structure in the {lambda}{lambda}5797 and 6614 diffuse interstellar bands

scholarly article

Further evidence for planet-star interaction in five short-period systems

scientific article published in January 2002

Gamma Cephei - Rotation or planetary companion?

scientific article published in the Astrophysical Journal

Gas phase absorption spectroscopy of C_60^+ and C_70^+ in a cryogenic ion trap: comparison with astronomical measurements

scientific article published in the Astrophysical Journal

Gas-phase absorptions of C_60_^+^: a new comparison with astronomical measurements

scientific article published in January 2016

Gas-phase electronic spectra of carbon-chain radicals compared with diffuse interstellar band observations

scientific article published in January 2000

H alpha emission in Cygnus X-1

scientific article

H alpha observations of Algol on 2 September 1972

scientific article published in January 1973

H-gamma observations for fourteen of Feige's faint blue stars

scientific article published in January 1968

He I lambda5876 profile variations in the massive X-ray binary system HD 153919/4U 1700-37

scientific article published in January 1995

He II lam 4686 emission in the spectrum of HDE 226868 (Cygnus X-1)

Hgamma and HeI lines in 09-B5 spectra

scholarly article

Hot Jupiters and Hot Spots: The Short‐ and Long‐Term Chromospheric Activity on Stars with Giant Planets

scientific article (publication date: April 2005)

Identification of H_2_ CCC as a diffuse interstellar band carrier

scientific article published in January 2011

Identification of more interstellar C_60_^+^ bands

scientific article published in January 2015

Interdependence of the 4430 A diffuse interstellar band, polarization, and ultraviolet extinction

scientific article published in January 1987

Interstellar extinction anomalies and the diffuse interstellar bands

Intriguing, low-amplitude periodicity in the radial velocities of delta Sagittarrii

scholarly article

Investigating Ca II emission in the RS Canum Venaticorum binary ER Vulpeculae using the broadening function formalism

scientific article published in January 2005

Ionization structure and partial obscuration of the P.N. NGC 3132 and NGC 3242

scientific article published in January 1981

Jet-like structures in {beta} Lyrae. Results of optical interferometry, spectroscopy and photometry

scientific article published in January 1996

Limits to interstellar C_4_ and C_5_ toward {zeta} Ophiuchi

scholarly article

Line profile variability of the Be star kappa Draconis

scientific article published in January 1991

Line-profile variations and dimensions of the Be star omicron Andromedae

scientific article published in January 1989

Line-profile variations of lambda Eridani in emission and quiescence

scientific article published in January 1993

Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity

scientific article published in Astronomy and Astrophysics

Long-period radial velocity variations of Arcturus

Looking for Giant Earths in the HD 209458 System: A Search for Transits inMOSTSpace‐based Photometry

scientific article published in the Astrophysical Journal

Looking for Super‐Earths in the HD 189733 System: A Search for Transits inMOSTSpace‐based Photometry

scientific article published in the Astrophysical Journal

MOST Detects SPBe Pulsations in HD 127756 and HD 217543: Asteroseismic Rotation Rates Independent of v sin i

scientific article published in the Astrophysical Journal

MOST Detects g-Modes in the Late-Type Be Star β Canis Minoris (B8 Ve)

scientific article published in the Astrophysical Journal

MOST and 10Aql

scientific article published in January 2008

MOST detects G-modes in the Be star HD 163868

scientific article published in January 2005

MOST detects variability on τ Bootis A possibly induced by its planetary companion

scientific article published in Astronomy and Astrophysics

MOST discovers a multimode δ Scuti star in a triple system: HD 61199

scientific article published in Astronomy and Astrophysics

MOST light-curve analysis of theγDoradus pulsator HR 8799, showing resonances and amplitude variations

scientific article published in Astronomy and Astrophysics

MOST observations of the young open cluster NGC 2264

scientific article published in Astronomy and Astrophysics

MOST photometry and modeling of the rapidly oscillating (roAp) star γ Equulei

scientific article published in Astronomy and Astrophysics

MOST photometry of the RRd Lyrae variable AQ Leo: two radial modes, 32 combination frequencies and beyond

scientific article

MOST photometry of the enigmatic PMS pulsator HD 142666

scientific article published in Astronomy and Astrophysics

MOST photometry of the roAp star 10 Aquilae

scientific article published in Astronomy and Astrophysics

MOSTDetectsg‐ andp‐Modes in the B Supergiant HD 163899 (B2 Ib/II)

scientific article published in the Astrophysical Journal

MOSTFinds No Coherent Oscillations in the Hot Carbon-rich Wolf-Rayet Star HD 165763 (WR 111)

scientific article published in the Astrophysical Journal

MOSTPhotometry and DDO Spectroscopy of the Eclipsing (White Dwarf + Red Dwarf) Binary V471 Tau

scientific article published in Astronomical Journal

MOSTSpace‐based Photometry of the Transiting Exoplanet System HD 189733: Precise Timing Measurements for Transits across an Active Star

scientific article published in the Astrophysical Journal

MOSTsatellite photometry of stars in the M67 field: eclipsing binaries, blue stragglers and δ Scuti variables★

scientific article

Magnetic cycles of the planet-hosting star τ Bootis

scientific article

Magnetic cycles of the planet-hosting star τ Bootis - II. A second magnetic polarity reversal

scientific article

Magnetic interaction between stars and hot Jupiters as observed in Ca II H & K emission - an update

scientific article published in January 2004

Modal noise in high-resolution, fiber-fed spectra: a study and simple cure

article by Baudrand J. & Walker G. A. H. published 2001 in Publications of the Astronomical Society of the Pacific

Modern Observations of Hubble’s First-discovered Cepheid in M31

Modulation of Ca II H and K emission by short-period planets

scientific article published in January 2003

Multiperiodicity of {zeta} Ophiuchi from multisite observations

scientific article published in January 1997

Narrow diffuse interstellar bands: a survey with precise wavelengths

scholarly article

Near-infrared adaptive optics imaging of nuclear spiral structure in the Seyfert galaxy NGC 3227

scientific article

New emission lines in the spectra of O and Of stars

scientific article published in January 1987

No stellar p-mode oscillations in space-based photometry of Procyon

scientific article

Nonradial oscillations of the Be star gamma Cassiopeiae

scientific article published in January 1988

Observation of M87 at 400 GeV with the Whipple 10 Meter Telescope

scientific article published in the Astrophysical Journal

Omicron Andromedae is quadruple

scientific article published in January 1988

On the possible role of carbon chains as carriers of diffuse interstellar bands

scientific article published in January 2004

Opening a new window on Ap star atmospheres: a T-Tau relation for HR 3831 from its limb-darkened pulsation amplitudes

scientific article published in January 1996

Optical observations and model for Cygnus X-1

scientific article published in January 1973

Oscillations in the Massive Wolf-Rayet Star WR 123 with theMOSTSatellite

scientific article published in the Astrophysical Journal

Photoelectric measures of the 4430 A diffuse interstellar band

scholarly article

Photoelectric scanner observations of CH Cygni for August 3, 1967

Photometric variability of the T Tauri star TW Hya on time-scales of hours to years★

scholarly article

Precise delta Teff and delta(R-I) for solar-type stars

scientific article published in January 1992

Precise radial velocities and radial velocity standards

Profiles of the {lambda}6196 and {lambda}6379 diffuse interstellar bands

scientific article published in January 2001

Properties and nature of Be stars. XV. Light variations of LQ And and its check stars revisited

scientific article published in January 1991

Pulsations of the Oe Star ζ Ophiuchi fromMOSTSatellite Photometry and Ground-based Spectroscopy

scientific article published in the Astrophysical Journal

Radial velocity variations of the delta Scuti variable beta Cassiopeiae

scientific article published in January 1982

Radial-velocity variations of the delta Scuti star 20 Canum Venaticorum

scientific article published in January 1986

Rapid infrared photometry of pulsating Ap stars: a measurement of stellar limb darkening

scientific article published in January 1990

Rapid line-profile variations of the Be star dzeta Tauri

Reduction of time-resolved space-based CCD photometry developed for MOST Fabry Imaging data

scientific article

Science capabilities of the VERITAS array of 10m imaging atmospheric Cerenkov gamma-ray detectors

Search for High‐Energy Gamma Rays from an X‐Ray–selected Blazar Sample

scientific article published in the Astrophysical Journal

Searching for faint companions with the TRIDENT differential simultaneous imaging camera

scientific article published in January 2003

Speckle noise and the detection of faint companions

scholarly article

Spectra of the red (2.0) CN band in 31G and K giant stars

scientific article published in January 1981

Spectral types and H-gamma observations for stars in eight associations

scientific article published in January 1968

Spectral variations in zeta Ophiuchi related to rotation ?

scientific article published in January 1979

Spectroscopic variations of the Be star LQ And: binarity and rotation

scientific article

Spectrum of Very High Energy Gamma‐Rays from the blazar 1ES 1959+650 during Flaring Activity in 2002

scientific article published in the Astrophysical Journal

Spectrum variations of the X-ray binary HD 153919=3U 1700-37

Stellar Model Analysis of the Oscillation Spectrum of η Bootis Obtained fromMOST

scientific article published in the Astrophysical Journal

Stellar modelling of Spica, a high-mass spectroscopic binary with a β Cep variable primary component

scholarly article

Tau Pegasi: a Fourier representation of line-profile variations

scientific article published in January 1992

TeV Gamma-Ray Observations of the Galactic Center

scientific article published in the Astrophysical Journal

The 9577 and 9632 {AA} diffuse interstellar bands: C_60_^+^ as carrier

The Cepheus IV association

scholarly article

The Differential Rotation of κ1Ceti as Observed byMOST

scientific article published in the Astrophysical Journal

The Extrasolar Planet ε Eridani b: Orbit and Mass

scientific article published in Astronomical Journal

The HF Precise Radial Velocity Programme at DAO

scholarly article

The HeII lambda 4686 and H-alpha emission lines of Cygnus X-1

scholarly article

The Mv - W (H-gamma) calibration for O6 to A3 supergiants

The Nature ofp‐Modes and Granulation in Procyon: NewMOSTPhotometry and New Yale Convection Models

scientific article published in the Astrophysical Journal

The On/Off Nature of Star‐Planet Interactions

scientific article published in the Astrophysical Journal

The RV Variability of Yellow Giants

scholarly article

The Recently Discovered Dwarf Nova System ASAS J002511+1217.2: A New WZ Sagittae Star

scholarly article

The TeV Spectrum of H1426+428

scientific article published in the Astrophysical Journal

The Very Low Albedo of an Extrasolar Planet:MOSTSpace‐based Photometry of HD 209458

scientific article published in the Astrophysical Journal

The archetype line-profile variable {epsilon} 45 Persei is a spectroscopic triple system

scholarly article

The brightest gamma-ray flaring blazar in the sky: AGILE and multi-wavelength observations of 3C 454.3 during 2010 November

article by Stefano Vercellone et al published 13 July 2011 in Letters of the Astrophysical Journal

The extinction of HD 200775 by dust in NGC 7023

The first high-precision radial velocity search for extra-solar planets

scientific article published in January 2012

The gas phase spectrum of cyclic C_18_and the diffuse interstellar bands

The line profile variations of Spica

scientific article published in January 1982

The line-profile variations of Theta2 Tauri

The mass of the planet-hosting giant starβGeminorum determined from its p-mode oscillation spectrum

scientific article published in Astronomy and Astrophysics

The orbit and mass of Procyon

scientific article published in January 1992

The oscillation modes of {theta}^2^ Tauri. Results from the 1992 MUSICOS campaign

scientific article

The primary orbit and the absorption lines of HDE 226868 (Cygnus X-1)

scientific article published in the Astrophysical Journal

The radial velocity precision of fiber-fed spectrographs

scientific article

The radial-velocity variations of Polaris: a Cepheid leaving the instability strip ?

The ratio of total-to-selective absorption for the Orion nebula

The reddening and near-infrared spectrum of NGC 7027

scholarly article

The scattering phase function of interstellar grains : the case of the reflection nebula NGC 7023

scientific article published in January 1982

The shape of the interstellar reddening curve

scientific article published in January 1966

The spectral variations of the delta Scuti star rho Puppis

scientific article

The spectrum variations of HD 153919

scientific article published in January 1980

The variations of BW Vulpeculae

scientific article published in January 1976

TheMOSTAsteroseismology Mission: Ultraprecise Photometry from Space

article

Three families of diffuse interstellar bands ?

scholarly article

Towards the Albedo of an Exoplanet: MOST Satellite Observations of Bright Transiting Exoplanetary Systems

UBV photometry of the associations Anon 84 and NGC 2081 in the LMC

scientific article published in January 1968

Ultrarapid activity at H-alpha in the spectra of Be stars

scientific article published in January 1971

VERITAS: the Very Energetic Radiation Imaging Telescope Array System

scholarly article

Variable Ca II H and K emission in the spectrum of lambda Andromedae

article published in 1976

Variable H-alpha emission in the helium-strong star delta Orionis C

scientific article published in January 1991

Variations in the hydrogen emission lines of Nova Cygni 1975 (V1500 Cygni)

scholarly article

Yellow giants: a new class of radial velocity variable ?

scientific article published in January 1989

{delta} Ceti is not monoperiodic: seismic modeling of a {beta} Cephei star from MOST(1) space-based photometry

scientific article