839 citations · 11.8k across the 225 of their papers we have counts for
37 papers · 1 filter
HD 38973 b -- a cold Saturn orbiting a Sun-like star
Adriana Errico, Robert A. Wittenmyer, Jonathan Horner +2
We report the detection of a long-period companion to the nearby solar-type star HD\,38973 using precision radial-velocity measurements. The radial-velocity data reveal a coherent…
The Spin-orbit alignment of two short period eclipsing binary systems
Tony Wells, B. C. Addison, R. A. Wittenmyer +8
We present a joint analysis of TESS photometry and radial velocity measurements obtained from the Minerva-Australis facility for two short-period eclipsing binaries, TIC 48227288 a…
Asteroseismology of the G8 subgiant beta Aquilae with SONG-Tenerife, SONG-Australia and TESS
Hans Kjeldsen, Timothy R. Bedding, Yaguang Li +28
We present time-series radial velocities of the G8 subgiant star beta Aql obtained in 2022 and 2023 using SONG-Tenerife and, for the first time, SONG-Australia. We also analyse a s…
Three-dimensional Orbit and Dynamical Masses of GJ 105 AC
Cayla M. Dedrick, Jason T. Wright, Jason D. Eastman +11
The precision of stellar models is higher than the precision at which we are able to measure the masses of most stars, with the notable exception of binaries where we can determine…
TOI-1994b: A Low Mass Eccentric Brown Dwarf Transiting A Subgiant Star
Emma Page, Joshua Pepper, Duncan Wright +22
We present the discovery of TOI-1994b, a low-mass brown dwarf transiting a hot subgiant star on a moderately eccentric orbit. TOI-1994 has an effective temperature of $7700^{+720}_…
TESS Asteroseismic Analysis of HD 76920: The Giant Star Hosting An Extremely Eccentric Exoplanet
Chen Jiang, Tao Wu, Adina D. Feinstein +30
The Transiting Exoplanet Survey Satellite (TESS) mission searches for new exoplanets. The observing strategy of TESS results in high-precision photometry of millions of stars acros…
The GALAH Survey and Symbiotic Stars. I. Discovery and follow-up of 33 candidate accreting-only systems
U. Munari, G. Traven, N. Masetti +14
We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600,255 stars so far observed by the GALAH high-resolution…
The Surface Magnetic Activity of the Weak-Line T Tauri Stars TWA 7 and TWA 25
B. A. Nicholson, G. Hussain, J. -F. Donati +6
We present an analysis of spectropolarimetric observations of the low-mass weak-line T Tauri stars TWA 25 and TWA 7. The large-scale surface magnetic fields have been reconstructed…
The GALAH+ Survey: A New Library of Observed Stellar Spectra Improves Radial Velocities and Hints at Motions within M67
Tomaž Zwitter, Janez Kos, Sven Buder +25
GALAH+ is a magnitude-limited survey of high resolution stellar spectra obtained by the HERMES spectrograph at the Australian Astronomical Observatory. Its third data release provi…
TESS Asteroseismology of Mensae: Benchmark Ages for a G7 Dwarf and its M-dwarf Companion
Ashley Chontos, Daniel Huber, Travis A. Berger +27
Asteroseismology of bright stars has become increasingly important as a method to determine fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiat…
The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system
L. Casagrande, J. Lin, A. D. Rains +23
In order to accurately determine stellar properties, knowledge of the effective temperature of stars is vital. We implement Gaia and 2MASS photometry in the InfraRed Flux Method an…
The GALAH Survey: A new constraint on cosmological lithium and Galactic lithium evolution from warm dwarf stars
Xudong Gao, Karin Lind, Anish M. Amarsi +22
Lithium depletion and enrichment in the cosmos is not yet well understood. To help tighten constraints on stellar and Galactic evolution models, we present the largest high-resolut…
The GALAH survey: A census of lithium-rich giant stars
Sarah Martell, Jeffrey Simpson, Adithya Balasubramaniam +20
We investigate the properties of 1262 red giant stars with high photospheric abundances of lithium observed by the GALAH and \Ktwo-HERMES surveys, and discuss them in the context o…
The GALAH survey: Multiple stars and our Galaxy. I. A comprehensive method for deriving properties of FGK binary stars
G. Traven, S. Feltzing, T. Merle +24
Binary stellar systems form a large fraction of the Galaxy's stars. They are useful as laboratories for studying the physical processes taking place within stars, and must be corre…
The GALAH survey: unresolved triple Sun-like stars discovered by the Gaia mission
Klemen Čotar, Tomaž Zwitter, Gregor Traven +16
The latest Gaia data release enables us to accurately identify stars that are more luminous than would be expected on the basis of their spectral type and distance. During an inves…
Discovery of a Compact Companion to a Nearby Star
Stephen R. Kane, Paul A. Dalba, Jonathan Horner +5
Radial velocity (RV) searches for exoplanets have surveyed many of the nearest and brightest stars for long-term velocity variations indicative of a companion body. Such surveys of…
The GALAH survey: a catalogue of carbon-enhanced stars and CEMP candidates
Klemen Čotar, Tomaž Zwitter, Janez Kos +19
Swan bands - characteristic molecular absorption features of the C molecule - are a spectroscopic signature of carbon-enhanced stars. They can also be used to identify carbon-e…
The GALAH and TESS-HERMES surveys: high-resolution spectroscopy of luminous supergiants in the Magellanic Clouds and Bridge
Jeffrey D. Simpson, Dennis Stello, Sanjib Sharma +24
We report the serendipitous observations of 571 luminous supergiants in the Magellanic Clouds by the spectroscopic GALAH and TESS-HERMES surveys: 434 stars in the Large Magellanic…
The GALAH Survey: Second Data Release
S. Buder, M. Asplund, L. Duong +39
The Galactic Archaeology with HERMES (GALAH) survey is a large-scale stellar spectroscopic survey of the Milky Way and designed to deliver chemical information complementary to a l…
The GALAH Survey: Accurate Radial Velocities and Library of Observed Stellar Template Spectra
Tomaž Zwitter, Janez Kos, Andrea Chiavassa +34
GALAH is a large-scale magnitude-limited southern stellar spectroscopic survey. Its second data release (GALAH DR2) provides values of stellar parameters and abundances of 23 eleme…
H Fluorescence in M Dwarf Systems: A Stellar Origin
Nicholas Kruczek, Kevin France, William Evonosky +7
Observations of molecular hydrogen (H) fluorescence are a potentially useful tool for measuring the H abundance in exoplanet atmospheres. This emission was previously obser…
The TESS-HERMES survey Data Release 1: high-resolution spectroscopy of the TESS southern continuous viewing zone
Sanjib Sharma, Dennis Stello, Sven Buder +22
The Transiting Exoplanet Survey Satellite (TESS) will provide high precision time-series photometry for millions of stars with at least a half-hour cadence. Of particular interest…
The Mysterious Dimmings of the T Tauri Star V1334 Tau
Joseph E. Rodriguez, George Zhou, Phillip A. Cargile +35
We present the discovery of two extended 0.12 mag dimming events of the weak-lined T-Tauri star V1334. The start of the first event was missed but came to an end in late 2003…
New spectroscopic binary companions of giant stars and updated metallicity distribution for binary systems
P. Bluhm, M. I. Jones, L. Vanzi +10
We report the discovery of 24 spectroscopic binary companions to giant stars. We fully constrain the orbital solution for 6 of these systems. We cannot unambiguously derive the orb…