626 citations · 1.4k across the 26 of their papers we have counts for
17 papers · 1 filter
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…
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…
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…
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…
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…
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…