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The eccentricity distribution of wide binaries and their individual measurements
Hsiang-Chih Hwang, Yuan-Sen Ting, Nadia L. Zakamska
Eccentricity of wide binaries is difficult to measure due to their long orbital periods. With Gaia's high-precision astrometric measurements, eccentricity of a wide binary can be c…
Wide binaries from the H3 survey: the thick disk and halo have similar wide binary fractions
Hsiang-Chih Hwang, Yuan-Sen Ting, Charlie Conroy +8
Due to the different environments in the Milky Way's disk and halo, comparing wide binaries in the disk and halo is key to understanding wide binary formation and evolution. By usi…
The SNIa Runaway LP 398-9: Detection of Circumstellar Material and Surface Rotation
Vedant Chandra, Hsiang-Chih Hwang, Nadia L. Zakamska +12
A promising progenitor scenario for Type Ia supernovae (SNeIa) is the thermonuclear detonation of a white dwarf in a close binary system with another white dwarf. After the primary…
A 99-minute Double-lined White Dwarf Binary from SDSS-V
Vedant Chandra, Hsiang-Chih Hwang, Nadia L. Zakamska +12
We report the discovery of SDSS J133725.26+395237.7 (hereafter SDSS J1337+3952), a double-lined white dwarf (WD+WD) binary identified in early data from the fifth generation Sloan…
Varstrometry for Off-nucleus and Dual sub-Kpc AGN (VODKA): Hubble Space Telescope Discovers Double Quasars
Yu-Ching Chen, Hsiang-Chih Hwang, Yue Shen +4
Dual supermassive black holes (SMBHs) at kpc scales are the progenitor population of SMBH mergers and play an important role in understanding the pairing and dynamical evolut…
A hidden population of high-redshift double quasars unveiled by astrometry
Yue Shen, Yu-Ching Chen, Hsiang-Chih Hwang +6
Galaxy mergers occur frequently in the early universe and bring multiple supermassive black holes (SMBHs) into the nucleus, where they may eventually coalesce. Identifying post-mer…