70 citations · 1k across the 46 of their papers we have counts for
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CSS1603+19: a low-mass polar near the cataclysmic variable period minimum
Yiqi Liu, Hsiang-Chih Hwang, Nadia L. Zakamska +1
CSS1603+19 is a cataclysmic variable (CV) with an orbital period of 81.96 min, near the minimal period of cataclysmic variables. It is unusual in having a strong mid-infrared exces…
A close quasar pair in a disk-disk galaxy merger at z = 2.17
Yu-Ching Chen, Xin Liu, Adi Foord +7
Galaxy mergers produce pairs of supermassive black holes (SMBHs), which may be witnessed as dual quasars if both SMBHs are rapidly accreting. The kiloparsec (kpc)-scale separation…
Statistics of Galactic-Scale Quasar Pairs at Cosmic Noon
Yue Shen, Hsiang-Chih Hwang, Masamune Oguri +8
The statistics of galactic-scale quasar pairs can elucidate our understanding of the dynamical evolution of supermassive black hole (SMBH) pairs, the duty cycles of quasar activity…
The mystery in Gaia DR3 triples: occurrence rates, orientations, and eccentricities of wide tertiaries around close binaries
Hsiang-Chih Hwang
The formation of close binaries has been an open question for decades. A large fraction of close binaries are in triple systems, suggesting that their formation may be associated w…
Wide twin binaries are extremely eccentric: evidence of twin binary formation in circumbinary disks
Hsiang-Chih Hwang, Kareem El-Badry, Hans-Walter Rix +3
The Gaia mission recently revealed an excess population of equal-mass "twin" wide binaries, with mass ratio , extending to separations of at least 1000 AU. The origi…
Enhancement of Double-Close-Binary Quadruples
Gavin B. Fezenko, Hsiang-Chih Hwang, Nadia L. Zakamska
Double-close-binary quadruples (2+2 systems) are hierarchical systems of four stars where two short-period binary systems move around their common center of mass on a wider orbit.…
TOI-3714 b and TOI-3629 b: Two gas giants transiting M dwarfs confirmed with HPF and NEID
Caleb I. Cañas, Shubham Kanodia, Chad F. Bender +36
We confirm the planetary nature of two gas giants discovered by TESS to transit M dwarfs. TOI-3714 () is an M2 dwarf hosting a hot Jupiter ($M_p=0.70 \pm 0.03~\ma…