Search Results - "Li, Tanda"
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Asteroseismic Modeling of 1153 Kepler Red Giant Branch Stars: Improved Stellar Parameters with Gravity-mode Period Spacings and Luminosity Constraints
Published in The Astrophysical journal (01-08-2023)“…Abstract This paper reports the estimated stellar parameters of 1153 Kepler red giant branch stars determined with asteroseismic modeling. We use radial-mode…”
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Asteroseismology of 3642 Kepler Red Giants: Correcting the Scaling Relations Based on Detailed Modeling
Published in The Astrophysical journal (01-03-2022)“…Abstract This paper presents a correction to the scaling relations for red giant stars using model-based masses and radii. We measure radial-mode frequencies…”
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3
PSF-based Analysis for Detecting Unresolved Wide Binaries
Published in The Astrophysical journal. Supplement series (01-09-2023)“…Abstract Wide binaries play a crucial role in analyzing the birth environment of stars and the dynamical evolution of clusters. When wide binaries are located…”
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4
Detection of Solar-like Oscillations in Subgiant and Red Giant Stars Using 2 minute Cadence TESS Data
Published in The Astrophysical journal. Supplement series (01-03-2024)“…Abstract Based on all 2 minute cadence TESS light curves from Sector 1 to 60, we provide a catalog of 8651 solar-like oscillators, including frequency at…”
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Stellar Cruise Control: Weakened Magnetic Braking Leads to Sustained Rapid Rotation of Old Stars
Published in The Astrophysical journal (01-02-2024)“…Abstract Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from…”
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Investigating 16 Open Clusters in the Kepler/K2–Gaia DR3 Field. I. Membership, Binary Systems, and Rotation
Published in The Astrophysical journal. Supplement series (01-09-2023)“…Abstract Using data from Gaia Data Release 3 and Kepler/K2, we present a catalog of 16 open clusters with ages ranging from 4–4000 Myr that provides detailed…”
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Relations of Rotation and Chromospheric Activity to Stellar Age for FGK Dwarfs from Kepler and LAMOST
Published in The Astrophysical journal. Supplement series (01-03-2024)“…Abstract The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we…”
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Realistic Uncertainties for Fundamental Properties of Asteroseismic Red Giants and the Interplay between Mixing Length, Metallicity, and νmax
Published in The Astrophysical journal (01-10-2024)“…Abstract Asteroseismic modeling is a powerful way to derive stellar properties. However, the derived quantities are limited by built-in assumptions used in…”
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Age of FGK Dwarfs Observed with LAMOST and GALAH: Considering the Oxygen Enhancement
Published in The Astrophysical journal. Supplement series (01-09-2023)“…Abstract Varying oxygen abundance could impact modeling-inferred ages. This work aims to estimate the ages of dwarfs considering observed oxygen abundance. To…”
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10
Two Long-period Giant Planets around Two Giant Stars: HD 112570 and HD 154391
Published in The Astronomical journal (01-02-2024)“…Abstract We present the discoveries of two giant plants orbiting the red-giant-branch star HD 112570 and the red-clump star HD 154391, based on the…”
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Revisiting the Red Giant Branch Hosts KOI-3886 and ι Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
Published in The Astronomical journal (01-05-2023)“…Abstract Asteroseismology is playing an increasingly important role in the characterization of red giant host stars and their planetary systems. Here, we…”
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The Evolution of Rotation and Magnetic Activity in 94 Aqr Aa from Asteroseismology with TESS
Published in The Astrophysical journal (01-09-2020)“…Most previous efforts to calibrate how rotation and magnetic activity depend on stellar age and mass have relied on observations of clusters, where isochrones…”
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13
Ages of Dwarfs in the Solar Neighborhood: Considering C and O Enhancements
Published in The Astrophysical journal (01-02-2020)“…Precise stellar ages of stars are necessary to study the evolution of the Milky Way. The age determination is significantly affected by C and O abundances of…”
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TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076
Published in The Astrophysical journal (01-06-2020)“…The Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission aiming to search for exoplanets that transit bright stars. The high-quality…”
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Asteroseismology of three evolved stars in M67: testing systematic biases in seismic masses and ages
Published in Monthly notices of the Royal Astronomical Society (25-04-2024)“…ABSTRACT Asteroseismology can precisely characterize stars, but the accuracy of seismic inference is still an open question. In this work, we use three evolved…”
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Systematics in Asteroseismic Modelling: Application of a Correlated Noise Model for Oscillation Frequencies
Published 05-06-2023“…2023MNRAS.523...80L The detailed modelling of stellar oscillations is a powerful approach to characterising stars. However, poor treatment of systematics in…”
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17
PSF-based Analysis for Detecting Unresolved Wide Binaries
Published 13-09-2023“…Wide binaries play a crucial role in analyzing the birth environment of stars and the dynamical evolution of clusters. When wide binaries are located at…”
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18
Modelling stars with Gaussian Process Regression: Augmenting Stellar Model Grid
Published 17-02-2022“…Grid-based modelling is widely used for estimating stellar parameters. However, stellar model grid is sparse because of the computational cost. This paper…”
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Mode Angular Degree Identification in Subgiant Stars with Convolutional Neural Networks based on Power Spectrum
Published 24-12-2020“…Identifying the angular degrees $l$ of oscillation modes is essential for asteroseismology and depends on visual tagging before fitting power spectra in a…”
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A prescription for the asteroseismic surface correction
Published 16-05-2023“…In asteroseismology, the surface effect refers to a disparity between the observed and the modelled frequencies in stars with solar-like oscillations. It…”
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