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List of works by Frank Grundahl

A Multisite Campaign to Measure Solar‐like Oscillations in Procyon. I. Observations, Data Reduction, and Slow Variations ⬇️

scientific article published in the Astrophysical Journal

A WFC3/HST view of the three stellar populations in the globular cluster NGC 6752 ⬇️

scientific article published in the Astrophysical Journal

A brown dwarf orbiting an M-dwarf: MOA 2009–BLG–411L

scientific article published in Astronomy and Astrophysics

A distance-independent age for the globular cluster M92

scientific article published in January 2000

A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251

scientific article published in Astronomy and Astrophysics

A large C+N+O abundance spread in giant stars of the globular cluster NGC 1851 ⬇️

scientific article published in January 2009

A long-period totally eclipsing binary star at the turnoff of the open cluster NGC 6819 discovered with Kepler ⬇️

scientific article published in the Astrophysical Journal

A multi-site campaign to measure solar-like oscillations in procyon. II. Mode frequencies ⬇️

scientific article published in the Astrophysical Journal

A new search for planet transits in NGC 6791

scientific article published in Astronomy and Astrophysics

A new standard: age and distance for the open cluster NGC 6791 from the eclipsing binary member V20

scientific article (publication date: December 2008)

A new type of ambiguity in the planet and binary interpretations of central perturbations of high-magnification gravitational microlensing events ⬇️

scientific article published in the Astrophysical Journal

A probable stellar solution to the cosmological lithium discrepancy

scientific article

A search for planets in the old open cluster NGC 6791

scientific article published in January 2003

A search for solar-like oscillations in K giants in the globular cluster M 4

scientific article published in Astronomy and Astrophysics

Abundances in giant stars of the globular cluster NGC 6752

scientific article

Abundances in globular cluster dwarfs

scientific article published in January 2003

Abundances of RGB stars in NGC 6752

scientific article published in January 2002

Age and distance for the old open cluster NGC 188 from the eclipsing binary member V 12

Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members

scientific article

Age and helium content of the open cluster NGC  6791 from multiple eclipsing binary members

scientific article published in Astronomy and Astrophysics

Age and helium content of the open cluster NGC  6791 from multiple eclipsing binary members

scientific article

Aldebaran b’s Temperate Past Uncovered in Planet Search Data ⬇️

scholarly article

Amplitudes of solar-like oscillations: constraints from red giants in open clusters observed by Kepler ⬇️

scholarly article

An abundance analysis of bright giants in the globular cluster NGC 1851 ⬇️

scientific article published in January 2008

An asteroseismic membership study of the red giants in three open clusters observed by Kepler: NGC 6791, NGC 6819, and NGC 6811 ⬇️

scientific article published in the Astrophysical Journal

Asteroseismic inferences on red giants in open clusters NGC 6791, NGC 6819, and NGC 6811 using Kepler

scientific article published in Astronomy and Astrophysics

Asteroseismic masses of four evolved planet-hosting stars using SONG and TESS : resolving the retired A-star mass controversy

scientific article published on 22 June 2020

Asteroseismic masses of retired planet-hosting A-stars using SONG

article by Dennis Stello et al published 6 September 2017 in Monthly Notices of the Royal Astronomical Society

Asteroseismology and interferometry

scholarly article

Asteroseismology of old open clusters with Kepler: direct estimate of the integrated red giant branch mass-loss in NGC 6791 and 6819

article

Asteroseismology of the Hyades red giant and planet host ϵ Tauri

scientific article

Atomic diffusion and mixing in old stars. I. Very Large Telescope FLAMES-UVES observations of stars in NGC 6397 ⬇️

scientific article published in January 2007

Atomic diffusion and mixing in old stars. II. Observations of stars in the globular cluster NGC 6397 with VLT/FLAMES-GIRAFFE

scientific article published in January 2008

Atomic diffusion and mixing in old stars. IV. Weak abundance trends in the globular cluster NGC 6752

scientific article

Atomic diffusion and mixing in old stars. VI. The lithium content of M30 ⬇️

scientific article published in January 2016

Benefits of multiple sites for asteroseismic detections

scientific article

Beyond the Kepler/K2 bright limit: variability in the seven brightest members of the Pleiades

scientific article

CNO abundances in the globular clusters NGC 1851 and NGC 6752 ⬇️

scientific article published in January 2015

Characterizing lenses and lensed stars of high-magnification single-lens gravitational microlensing events with lenses passing over source stars ⬇️

scientific article published in the Astrophysical Journal

Characterizing low-mass binaries from observation of long-timescale caustic-crossing gravitational microlensing events ⬇️

scientific article published in the Astrophysical Journal

Chemical abundances in bright giants of the globular cluster M62 (NGC 6266)★ ⬇️

scientific article

Conducting the SONG: the robotic nature and efficiency of a fully automated telescope

scientific article published in January 2019

Confirmation of Solar-like Oscillations in Bootis

scientific article published in Astronomical Journal

Constraints on helium enhancement in the globular cluster M3 (NGC 5272): the horizontal branch test ⬇️

Cyanogen in NGC 1851 red giant branch and asymptotic giant branch stars: quadrimodal distributions ⬇️

scientific article published in January 2012

Detection of a Faint Optical Jet in 3C 120 ⬇️

scientific article published in the Astrophysical Journal

Detection of scattered light in telescopes

Detection of solar-like oscillations from Kepler photometry of the open cluster NGC 6819 ⬇️

article

Detection of solar-like oscillations in relics of the Milky Way: asteroseismology of K giants in M4 using data from the NASA K2 mission ⬇️

scientific article

Detection of the lensing galaxy for the double QSO HE 1104-1805

scientific article published in January 1998

Determining the age of the Kepler open cluster NGC 6819 with a new triple system and other eclipsing binary stars ⬇️

scientific article published in Astronomical Journal

Distances and ages of NGC 6397, NGC 6752 and 47 Tuc

scientific article

ERRATUM: “LOW-RESOLUTION SPECTROSCOPY OF GAMMA-RAY BURST OPTICAL AFTERGLOWS: BIASES IN THESWIFTSAMPLE AND CHARACTERIZATION OF THE ABSORBERS” (2009, ApJS, 185, 526)

article

Erratum: Sounding stellar cycles with Kepler – II. Ground-based observations

scholarly article published in Monthly Notices of the Royal Astronomical Society

Establishing the accuracy of asteroseismic mass and radius estimates of giant stars - I. Three eclipsing systems at [Fe/H] ~ -0.3 and the need for a large high-precision sample

scientific article

Exploiting the Open Clusters in the Kepler and CoRoT Fields ⬇️

First Results from the Hertzsprung SONG Telescope: Asteroseismology of the G5 Subgiant Star μHerculis ⬇️

scientific article published in the Astrophysical Journal

First detection of oscillations in the Halo giant HD 122563: Validation of seismic scaling relations and new parameters

scholarly article

Flux and color variations of the doubly imaged quasar UM673

scientific article published in Astronomy and Astrophysics

Flux and color variations of the quadruply imaged quasar HE 0435-1223

scientific article published in Astronomy and Astrophysics

GRB 080810: observations from NOT

scientific article published in January 2008

HAYDN

scientific article published on 26 March 2021

Heavy elements abundances in turn-off stars and early subgiants in NGC 6752

scientific article published in January 2004

High frame rate imaging based photometry. Photometric reduction of data from electron-multiplying charge coupled devices (EMCCDs)

scientific article published in January 2012

High precision differential abundance measurements in globular clusters: chemical inhomogeneities in NGC 6752

scientific article published in January 2013

High-precision abundances of elements in Kepler LEGACY stars

scientific article published in Astronomy and Astrophysics

High-precision abundances of elements in stars with asteroseismic ages

High-resolution imaging of the gravitational lens candidate 1208+1011 with the Nordic Optical Telescope

scientific article published in January 1995

Hot HB stars in globular clusters - Physical parameters and consequences for theory. VI. The second parameter pair M 3 and M 13

scientific article published in January 2003

Hot horizontal branch stars in NGC 288 - effects of diffusion and stratification on their atmospheric parameters ⬇️

scientific article

Hot horizontal-branch stars: the ubiquitous nature of the ``Jump'' in Stromgren {\em u}, low gravities, and the role of radiative levitation of Metals(1) ⬇️

scholarly article

Iron and neutron-capture element abundance variations in the globular cluster M2 (NGC 7089)★ ⬇️

scholarly article

Kepler sheds new and unprecedented light on the variability of a blue supergiant: Gravity waves in the O9.5Iab star HD 188209

scientific article published in Astronomy and Astrophysics

Low-frequency photospheric and wind variability in the early-B supergiant HD 2905

scientific article published in Astronomy and Astrophysics

Low-resolution spectroscopy of gamma-ray burst optical afterglows: biases in the Swift sample and characterization of the absorbers

article

MASCARA-1 b

scientific article published in Astronomy and Astrophysics

MASCARA-1 b. A hot Jupiter transiting a bright m_V_ = 8.3 A-star in a misaligned orbit

scientific article

MASCARA-2 b. A hot Jupiter transiting the m_V_ = 7.6 A-star HD 185603

scientific article published in January 2018

MOA-2009-BLG-387Lb: a massive planet orbiting an M dwarf

scientific article published in Astronomy and Astrophysics

Metallicity distribution of ω Cen Red Giants based on the Strömgren m1 metallicity index

Mg isotopic ratios in giant stars of the globular cluster NGC 6752

scientific article published in January 2003

Microlensing binaries discovered through high-magnification channel ⬇️

scientific article published in the Astrophysical Journal

Microlensing binaries with candidate brown dwarf companions ⬇️

scientific article published in the Astrophysical Journal

Microlensing discovery of a population of very tight, very low mass binary brown dwarfs ⬇️

scientific article published in the Astrophysical Journal

Monitoring of the Einstein Cross with the Nordic Optical Telescope

scientific article published in January 1996

Multi-band photometry in omega Centauri

scientific article published in January 2006

NGC 1817: the richest population of ? Scuti stars

scientific article

NGC 2660 revisited

scientific article

NGC 6121-V46: a low-mass double degenerate ellipsoidal variable in a globular cluster

New Abundances for Old Stars - Atomic Diffusion at Work in NGC 6397

Nitrogen abundances and multiple stellar populations in the globular clusters of the Fornax dSph ⬇️

scientific article published in January 2014

Nitrogen abundances in giant stars of the globular cluster NGC 6752 ⬇️

scientific article published in January 2008

No swan song for Sun-as-a-star helioseismology: Performances of the Solar-SONG prototype for individual mode characterisation

scientific article published on 01 November 2021

OGLE-2009-BLG-092/MOA-2009-BLG-137: a dramatic repeating event with the second perturbation predicted by real-time analysis ⬇️

scientific article published in the Astrophysical Journal

Observations of the radial velocity of the Sun as measured with the novel SONG spectrograph: results from a 1-week campaign

article by P L Pallé et al published 11 June 2013 in Journal of Physics: Conference Series

On a new theoretical calibration of the Stromgren hk metallicity index: NGC 6522 as a first test case ⬇️

On the Afterglow of the X‐Ray Flash of 2003 July 23: Photometric Evidence for an Off‐Axis Gamma‐Ray Burst with an Associated Supernova? ⬇️

scientific article published in the Astrophysical Journal

Oscillating blue stragglers, {gamma} Doradus stars and eclipsing binaries in the open cluster NGC 2506

scientific article published in January 2007

Oscillations in Procyon A: First results from a multi-site campaign

Oscillations in the Sun with SONG: Setting the scale for asteroseismic investigations

scientific article

Pinpointing isochrones in clusters

Pinpointing isochrones in clusters

scientific article published in January 2006

Precise radial velocities of giant stars

scientific article published in November 2019

Pulsating stars and EBs in clusters: NGC 2506

Pyodine: An open, flexible reduction software for iodine-calibrated precise radial velocities

scientific article published in June 2023

Radial distributions of sub-populations in the globular cluster M15: a more centrally concentrated primordial population ⬇️

scholarly article

Re: GRB000508B : optical observations

scholarly article

Reddening Distribution across the Center of the Globular Cluster ω Centauri ⬇️

scientific article published in the Astrophysical Journal

Rotation and {delta} Scuti stars in the open clusters NGC 1817 and NGC 7062

scientific article published in January 2009

Rubidium and lead abundances in globular clusters

scientific article published in January 2006

SONG: Stellar Oscillations Network Group. A global network of small telescopes for asteroseismology and planet searches

scientific article published in January 2006

SPB stars in the open SMC cluster NGC 371

scholarly article

Search for planets around stars with wide brown dwarfs

scientific article published on 28 February 2023

Searching for solar-like oscillations in the δ Scuti star ρ Puppis★

scientific article

Signatures of intrinsic Li depletion and Li-Na anti-correlation in the metal-poor globular cluster NGC 6397

scholarly article

Sodium content as a predictor of the advanced evolution of globular cluster stars.

scientific article published on 29 May 2013

Solar-like oscillations in the G9.5 subgiantβAquilae

scientific article published in Astronomy and Astrophysics

Solar-like oscillations in the metal-poor subgiant ν Indi

scientific article published in Astronomy and Astrophysics

Solar‐like Oscillations in the Metal‐poor Subgiant ν Indi: Constraining the Mass and Age Using Asteroseismology ⬇️

scientific article published in the Astrophysical Journal

Sounding open clusters: asteroseismic constraints from Kepler on the properties of NGC 6791 and NGC 6819 ⬇️

article

Sounding stellar cycles with Kepler – II. Ground-based observations

scientific article

Sounding stellar cycles with Kepler – preliminary results from ground-based chromospheric activity measurements

Spectroscopic study of the open cluster NGC 6811★ ⬇️

scientific article

State of the Field: Extreme Precision Radial Velocities ⬇️

scientific article

Stellar Observations Network Group: The prototype is nearly ready

scholarly article

Stellar Oscillations Network Group – SONG

article by F Grundahl et al published 1 October 2008 in Journal of Physics: Conference Series

Stroemgren photometry of globular clusters: the distance and age of M13, evidence for two populations of horizontal-branch stars ⬇️

scientific article published in January 1998

Stromgren metallicity calibration: the m_1, b-y relation

scholarly article

Stromgren CCD photometry of globular clusters

scientific article published in January 1999

Stromgren Photometry of Galactic Globular Clusters. I. New Calibrations of the Metallicity Index ⬇️

scientific article published in the Astrophysical Journal

Stromgren photometry of Galactic globular clusters. II. Metallicity distribution of red giants in {omega} Centauri ⬇️

scientific article published in the Astrophysical Journal

Strömgren Survey for Asteroseismology and Galactic Archaeology: Let the Saga Begin ⬇️

scientific article published in the Astrophysical Journal

Systematic differences in the spectroscopic analysis of red giants

scholarly article

TOI-1431b/MASCARA-5b: A Highly Irradiated Ultrahot Jupiter Orbiting One of the Hottest and Brightest Known Exoplanet Host Stars ⬇️

scientific article published in December 2021

Testing asteroseismic scaling relations using eclipsing binaries in star clusters and the field ⬇️

The Delta Scuti Star Rho Puppis: the Perfect Target to Probe the Theory Predicting Solar-like Oscillations in Cool Delta Scuti Stars

The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters

scientific article published in January 2001

The SUMO project I. A survey of multiple populations in globular clusters

scientific article

The TESS–Keck Survey. I. A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras

The [Y/Mg] clock works for evolved solar metallicity stars

scientific article published in Astronomy and Astrophysics

The afterglows of swift-era gamma-ray bursts. I. Comparing pre-Swift and swift-era Long/Soft (Type II) GRB optical afterglows ⬇️

scientific article published in the Astrophysical Journal

The age and distance of the Kepler open cluster NGC 6811 from an eclipsing binary, turnoff star pulsation, and giant asteroseismology ⬇️

scientific article published in the Astrophysical Journal

The age of 47 Tuc from self-consistent isochrone fits to colour-magnitude diagrams and the eclipsing member V69 ⬇️

scientific article published in January 2017

The ages of the globular clusters M71 and 47 Tuc from Stroemgren uvby photometry. Evidence for high ages

scientific article published in January 2002

The blue straggler V106 in NGC 6791: a prototype progenitor of old single giants masquerading as young

scientific article

The case of the disappearing CN-strong AGB stars in galactic globular clusters - preliminary results

scientific article published in January 2010

The globular cluster NGC 6402 (M14). I. A new BV color-magnitude diagram

scientific article

The globular cluster NGC 6402 (M14). II. Variable stars

scientific article published in January 2018

The lithium content of the globular cluster NGC 6397

scientific article published in January 2002

The mass and age of the first SONG target: the red giant 46 LMi

scientific article published in Astronomy and Astrophysics

The optical appearance of the gravitational lens system B0218+35.7

scientific article published in January 1995

The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG ⬇️

scientific article published in Astronomy and Astrophysics

Tracing the evolution of NGC 6397 through the chemical composition of its stellar populations

scientific article published in January 2011

Ultraviolet spectra of hot horizontal branch stars in NGC 6752

Using SONG to probe rapid variability and evolution of starspots

article by James E. Neff et al published August 2010 in Proceedings of the International Astronomical Union

VLT Image of Globular Cluster 47 Tuc

scholarly article

Variability in the Massive Open Cluster NGC 1817 from K2: A Rich Population of Asteroseismic Red Clump, Eclipsing Binary, and Main-sequence Pulsating Stars

scientific article published on 10 February 2020

WOCS 40007: a detached eclipsing binary near the turnoff of the open cluster NGC 6819

scientific article published in Astronomical Journal

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