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A Deficit of Massive White Dwarfs in Gaia Astrometric Binaries
Na'ama Hallakoun, Sahar Shahaf, Tsevi Mazeh +2
The third data release of Gaia introduced a large catalog of astrometric binaries, out of which about 3,200 are likely main-sequence stars with a white-dwarf (WD) companion. These…
Wide post-common envelope binaries containing ultramassive white dwarfs: evidence for efficient envelope ejection in massive AGB stars
Natsuko Yamaguchi, Kareem El-Badry, Jim Fuller +7
Post-common-envelope binaries (PCEBs) containing a white dwarf (WD) and a main-sequence (MS) star can constrain the physics of common envelope evolution and calibrate binary evolut…
Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST
Benjamin J. Hord, Eliza M. -R. Kempton, Thomas Mikal-Evans +142
JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5,000 confirmed planets, more than 4,000 TESS planet candidates a…
Features of Gaia DR3 Spectroscopic Binaries I. Tidal circularization of Main-Sequence Stars
Dolev Bashi, Tsevi Mazeh, Simchon Faigler
Previous studies pointed out that many observed samples of short-period binaries display a cutoff period, , such that almost all binaries with periods shorter than $P_…
A red giant orbiting a black hole
Kareem El-Badry, Hans-Walter Rix, Yvette Cendes +18
We report spectroscopic and photometric follow-up of a dormant black hole (BH) candidate from Gaia DR3. The system, which we call Gaia BH2, contains a red giant a…