626 citations · 1.4k across the 26 of their papers we have counts for
26 papers
The 3D Architecture of a pair of 6:1 Resonant Brown Dwarfs around the Naked-eye star Ophiuchi
Tianshenhong Sang, Guang-Yao Xiao, Ying-Yi Cao +8
We present a revisiting study of the brown dwarf pair orbiting the naked-eye () K-giant ~Ophiuchi, located only 44\,pc from our Solar system. By jointly analysing archiva…
C3PO: Towards a complete census of co-moving pairs of stars. I. High precision stellar parameters for 250 stars
David Yong, Fan Liu, Yuan-Sen Ting +6
We conduct a line-by-line differential analysis of a sample of 125 co-moving pairs of stars (dwarfs and subgiants near solar metallicity). We obtain high precision stellar paramete…
The odd bunch: chrono-chemo-dynamics of sixteen unusual stars from Kepler
Arthur Alencastro Puls, Luca Casagrande, Stephanie Monty +4
In this study we combine asteroseismic, spectroscopic and kinematic information to perform a detailed analysis of a sample of 16 stars from the Kepler field. Our selection focuses…
Survey for Distant Solar Twins (SDST) -- III. Identification of new solar twin and solar analogue stars
Christian Lehmann, Michael T. Murphy, Fan Liu +3
The Survey for Distant Solar Twins (SDST) aims to find stars very similar to the Sun at distances 1-4 kpc, several times more distant than any currently known solar twins and analo…
A limit on variations in the fine-structure constant from spectra of nearby Sun-like stars
Michael T. Murphy, Daniel A. Berke, Fan Liu +4
The fine structure constant, , sets the strength of the electromagnetic force. The Standard Model of particle physics provides no explanation for its value, which could potentia…
Survey for Distant Solar Twins (SDST) -- II. Design, observations and data
Fan Liu, Michael T. Murphy, Christian Lehmann +5
Studies of solar twins have key impacts on the astronomical community, but only 100--200 nearby solar twins ( 1 kpc) have been reliably identified over the last few decade…
Probing Galactic variations in the fine-structure constant using solar twin stars: systematic errors
Daniel A. Berke, Michael T. Murphy, Chris Flynn +1
Sun-like stars are a new probe of variations in the fine-structure constant, , via the solar twins approach: velocity separations of close pairs of absorption lines are compared…
Probing Galactic variations in the fine-structure constant using solar twin stars: methodology and results
Daniel A. Berke, Michael T. Murphy, Chris Flynn +1
The rich absorption spectra of Sun-like stars are enticing probes for variations in the fine-structure constant, , which gauges the strength of electromagnetism. While individua…
Detailed chemical compositions of planet-hosting stars: II. Exploration of the interiors of terrestrial-type exoplanets
Haiyang S. Wang, Sascha P. Quanz, David Yong +4
A major goal in the discovery and characterisation of exoplanets is to identify terrestrial-type worlds that are similar to (or otherwise distinct from) our Earth. Recent results h…
Survey for Distant Solar Twins (SDST) -- I. EPIC method for stellar parameter measurement
Christian Lehmann, Michael T. Murphy, Fan Liu +2
Solar twins are stars of key importance to the field of astronomy and offer a multitude of science applications. Only a small number () of solar twins are known today,…
Chemo-dynamics and asteroseismic ages of seven metal-poor red giants from the Kepler field
Arthur Alencastro Puls, Luca Casagrande, Stephanie Monty +5
In this work we combine information from solar-like oscillations, high-resolution spectroscopy and Gaia astrometry to derive stellar ages, chemical abundances and kinematics for a…
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: Third Data Release
Sven Buder, Sanjib Sharma, Janez Kos +44
The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the…
Super-Earth masses sculpted by pebble isolation around stars of different masses
Beibei Liu, Michiel Lambrechts, Anders Johansen +1
We develop a pebble-driven model to study the formation and evolution of planets around stars in the mass range of 0.08 and 1 solar mass. The growth and migration of a large number…
Super-Earth ingestion can explain the anomalously high metal abundances of M67 Y2235
Ross P. Church, Alexander J. Mustill, Fan Liu
We investigate the hypothesis that ingestion of a terrestrial or super-Earth planet could cause the anomalously high metal abundances seen in a turn-off star in the open cluster M6…
Stellar abundance of binary stars: their role in determining the formation location of super-Earths and ice giants
Bertram Bitsch, Rebecca Forsberg, Fan Liu +1
Binary stars form from the same parent molecular cloud and thus have the same chemical composition. Forming planets take building material (solids) away from the surrounding protop…
Detailed chemical compositions of the wide binary HD 80606/80607: revised stellar properties and constraints on planet formation
F. Liu, D. Yong, M. Asplund +5
Differences in the elemental abundances of planet hosting stars in binary systems can give important clues and constraints about planet formation and evolution. In this study we pe…
Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets Via Precise Stellar Characterization
Megan Bedell, Jacob L. Bean, Jorge Melendez +7
The six planets of the Kepler-11 system are the archetypal example of a population of surprisingly low-density transiting planets revealed by the Kepler mission. We have determined…
A Comparison of Stellar Elemental Abundance Techniques and Measurements
Natalie R. Hinkel, Patrick A. Young, Michael D. Pagano +15
Stellar elemental abundances are important for understanding the fundamental properties of a star or stellar group, such as age and evolutionary history, as well as the composition…
The Pan-Pacific Planet Search V. Fundamental Parameters for 164 Evolved Stars
Robert A. Wittenmyer, Fan Liu, Liang Wang +3
We present spectroscopic stellar parameters for the complete target list of 164 evolved stars from the Pan-Pacific Planet Search, a five-year radial velocity campaign using the 3.9…
High precision analysis of the solar twin HIP 100963
Jhon Yana Galarza, Jorge Meléndez, Ivan Ramírez +3
Methods. We used the HIRES spectrograph on the Keck I telescope to acquire high-resolution (R 70000) spectra with a high signal-to-noise ratio (S/N 400 - 650 pe…
The dissimilar chemical composition of the planet-hosting stars of the XO-2 binary system
I. Ramirez, S. Khanal, P. Aleo +7
Using high-quality spectra of the twin stars in the XO-2 binary system, we have detected significant differences in the chemical composition of their photospheres. The differences…
The Pan-Pacific Planet Search. II. Confirmation of a two-planet system around HD 121056
Robert A. Wittenmyer, Liang Wang, Fan Liu +5
Precise radial velocities from the Anglo-Australian Telescope confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution u…
A high precision chemical abundance analysis of the HAT-P-1 stellar binary: constraints on planet formation
F. Liu, M. Asplund, I. Ramirez +2
We present a high-precision, differential elemental abundance analysis of the HAT-P-1 stellar binary based on high-resolution, high signal-to-noise ratio Keck/HIRES spectra. The se…