Search Results for author: Hsiang-Chih Hwang

Found 5 papers, 2 papers with code

Variability, periodicity and contact binaries in WISE

no code implementations8 Dec 2020 Evan Petrosky, Hsiang-Chih Hwang, Nadia L. Zakamska, Vedant Chandra, Matthew J. Hill

The time-series component of WISE is a valuable resource for the study of variable objects.

Time Series Analysis Solar and Stellar Astrophysics

The non-monotonic, strong metallicity dependence of the wide-binary fraction

no code implementations6 Oct 2020 Hsiang-Chih Hwang, Yuan-Sen Ting, Kevin C. Schlaufman, Nadia L. Zakamska, Rosemary F. G. Wyse

The negative metallicity correlation at [Fe/H]$>0$ can be inherited from the similar metallicity dependence of close binaries, and radial migration may play a role in enhancing the wide-binary fraction around the solar metallicity.

Solar and Stellar Astrophysics Astrophysics of Galaxies

A Gravitational Redshift Measurement of the White Dwarf Mass-Radius Relation

no code implementations28 Jul 2020 Vedant Chandra, Hsiang-Chih Hwang, Nadia L. Zakamska, Sihao Cheng

The mass-radius relation of white dwarfs is largely determined by the equation of state of degenerate electrons, which causes the stellar radius to decrease as mass increases.

Solar and Stellar Astrophysics Astrophysics of Galaxies

Computational Tools for the Spectroscopic Analysis of White Dwarfs

1 code implementation22 Jul 2020 Vedant Chandra, Hsiang-Chih Hwang, Nadia L. Zakamska, Tamás Budavári

The spectroscopic features of white dwarfs are formed in the thin upper layer of their stellar photosphere.

Solar and Stellar Astrophysics

Lifetime of short-period binaries measured from their Galactic kinematics

1 code implementation13 Sep 2019 Hsiang-Chih Hwang, Nadia Zakamska

Instead, our best-fit models suggest that the formation of these short-period binaries is delayed by 0. 6-3 Gyr, and the disappearing time is less than the age of the thick disk.

Solar and Stellar Astrophysics Astrophysics of Galaxies

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