239 citations · 1.1k across the 33 of their papers we have counts for
33 papers
The highest mass Kepler red giants -- II. Spectroscopic parameters, the amplitude-activity relation, and unexpected halo orbits
Courtney L. Crawford, Yaguang Li, Daniel Huber +11
The high-mass (M2 \Msolar{}) Kepler red giant stars are less well-studied than their lower-mass counterparts. In the previous article, we presented a sample of 48 high-mass Kepl…
Asteroseismology of Long-Period Variables with OGLE-IV data: Using Global Seismic Parameters as Luminosity Indicators
Qiang Xiong, Tanda Li, Jie Yu +19
Long-period variables (LPVs) are high-luminosity red giants or supergiants with pulsation periods ranging from days to years. Many LPVs in the Large Magellanic Cloud (LMC) and Gala…
The highest mass Kepler red giants -- I. Global asteroseismic parameters of 48 stars
Courtney L. Crawford, Timothy R. Bedding, Yaguang Li +6
When low- and intermediate-mass stars evolve off the main sequence, they expand and cool into the red giant stages of evolution, which include those associated with shell H burning…
Detection of Solar-like Oscillations in Sub-giant and Red Giant Stars Using 2-minute Cadence TESS Data
Jianzhao Zhou, Shaolan Bi, Jie Yu +7
Based on all 2-minute cadence light curves from Sector 1 to 60, we provide a catalog of 8,651 solar-like oscillators, including frequency at maximum power (, wi…
A simple method to measure numax for asteroseismology: application to 16,000 oscillating Kepler red giants
K. R. Sreenivas, Timothy R. Bedding, Yaguang Li +4
The importance of numax (the frequency of maximum oscillation power) for asteroseismology has been demonstrated widely in the previous decade, especially for red giants. With the l…
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…
Surface magnetism of rapidly rotating red giants: single versus close binary stars
Charlotte Gehan, Patrick Gaulme, Jie Yu
According to dynamo theory, stars with convective envelopes efficiently generate surface magnetic fields, which manifest as magnetic activity in the form of starspots, faculae, fla…
Three low-mass companions around aged stars discovered by TESS
Zitao Lin, Tianjun Gan, Sharon X. Wang +42
We report the discovery of three transiting low-mass companions to aged stars: a brown dwarf (TOI-2336b) and two objects near the hydrogen burning mass limit (TOI-1608b and TOI-252…
Astroconformer: Inferring Surface Gravity of Stars from Stellar Light Curves with Transformer
Jiashu Pan, Yuan-Sen Ting, Jie Yu
We introduce Astroconformer, a Transformer-based model to analyze stellar light curves from the Kepler mission. We demonstrate that Astrconformer can robustly infer the stellar sur…
ET White Paper: To Find the First Earth 2.0
Jian Ge, Hui Zhang, Weicheng Zang +163
We propose to develop a wide-field and ultra-high-precision photometric survey mission, temporarily named "Earth 2.0 (ET)". This mission is designed to measure, for the first time,…
Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
Jie Yu, Shourya Khanna, Nathalie Themessl +4
Asteroseismology has become widely accepted as a benchmark for accurate and precise fundamental stellar properties. It can therefore be used to validate and calibrate stellar param…
Ages of Main-Sequence Turn-Off Stars from the GALAH Survey
Xunzhou Chen, Zhishuai Ge, Yuqin Chen +6
Main sequence turn-off (MSTO) stars are good tracers of Galactic populations since their ages can be reliably estimated from atmospheric parameters. Based on the GALAH survey, we u…
Modeling Stellar Oscillations and Granulation in Radial Velocity Time Series: A Fourier-based Method
Zhao Guo, Eric B. Ford, Dennis Stello +4
Tens of thousands of solar-like oscillating stars have been observed by space missions. Their photometric variability in the Fourier domain can be parameterized by a sum of two sup…
The Effect of Stellar Contamination on Low-resolution Transmission Spectroscopy: Needs Identified by NASA's Exoplanet Exploration Program Study Analysis Group 21
Benjamin V. Rackham, Néstor Espinoza, Svetlana V. Berdyugina +58
Study Analysis Group 21 (SAG21) of NASA's Exoplanet Exploration Program Analysis Group (ExoPAG) was organized to study the effect of stellar contamination on space-based transmissi…
Age Determination of Galaxy Merger Remnant Stars using Asteroseismology
Camilla C. Borre, Víctor Aguirre Børsen-Koch, Amina Helmi +12
The Milky Way was shaped by the mergers with several galaxies in the past. We search for remnant stars that were born in these foreign galaxies and assess their ages in an effort t…
A binary with a ~Scuti star and an oscillating red giant: orbit and asteroseismology of KIC9773821
Simon J Murphy, Tanda Li, Sanjay Sekaran +8
We study the Scuti -- red giant binary KIC9773821, the first double-pulsator binary of its kind. It was observed by \textit{Kepler} during its four-year mission. Our aims are t…
Asteroseismology of luminous red giants with Kepler. II. Dependence of mass loss on pulsations and radiation
Jie Yu, Saskia Hekker, Timothy R. Bedding +5
Mass loss by red giants is an important process to understand the final stages of stellar evolution and the chemical enrichment of the interstellar medium. Mass-loss rates are thou…
Very regular high-frequency pulsation modes in young intermediate-mass stars
Timothy R. Bedding, Simon J. Murphy, Daniel R. Hey +33
Asteroseismology is a powerful tool for probing the internal structures of stars by using their natural pulsation frequencies. It relies on identifying sequences of pulsation modes…
Solar-type Stars Observed by LAMOST and Kepler
Jinghua Zhang, Alexander I. Shapiro, Shaolan Bi +8
Obtaining measurements of chromospheric and photometric activity of stars with near-solar fundamental parameters and rotation periods is important for a better understanding of sol…
Magnetic Activity of F-, G-, and K-type Stars in the LAMOST-Kepler Field
Jinghua Zhang, Shaolan Bi, Yaguang Li +10
Monitoring chromospheric and photospheric indexes of magnetic activity can provide valuable information, especially the interaction between different parts of the atmosphere and th…
Asteroseismology of luminous red giants with Kepler I: Long Period Variables with radial and non-radial modes
Jie Yu, Timothy R. Bedding, Dennis Stello +4
While long period variables (LPVs) have been extensively investigated, especially with MACHO and OGLE data for the Magellanic Clouds, there still exist open questions in their puls…
The K2 Bright Star Survey I: Methodology and Data Release
Benjamin J. S. Pope, Timothy R. White, Will M. Farr +9
While the Kepler Mission was designed to look at tens of thousands of faint stars (V > 12), brighter stars that saturated the detector are important because they can be and have be…
The Kepler Smear Campaign: Light curves for 102 Very Bright Stars
Benjamin J. S. Pope, Guy R. Davies, Keith Hawkins +19
We present the first data release of the Kepler Smear Campaign, using collateral 'smear' data obtained in the Kepler four-year mission to reconstruct light curves of 102 stars too…
Predicting radial-velocity jitter induced by stellar oscillations based on Kepler data
Jie Yu, Daniel Huber, Timothy R. Bedding +1
Radial-velocity (RV) jitter due to intrinsic stellar variability introduces challenges when characterizing exoplanet systems, particularly when studying small (sub-Neptune-sized) p…