Isaac D. LOPEZ, Alekzander KOSAKOWSKI, Brad N. BARLOW, Thomas KUPFER
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We present a search for new variable hot subdwarfs from Gaia eDR3 using the Zwicky Transient Facility DR9 and the 2.1 m Otto Struve Telescope at McDonald Observatory. We report the discovery of 22 HW Vir binaries, 24 reflection effect binaries, and 14 ellipsoidally modulated systems. Candidate selection for our high-speed observations was based on object location on the Gaia color-magnitude diagram and on intrinsic variability, which we estimate from the Gaia G flux uncertainties. Notable discoveries include a candidate 72 min period sdB+WD binary and two short period HW Vir binaries with periods around 67 min and 79 min, which includes the shortest-period eclipsing sdB+dM/BD discovered to date.
期刊介绍：
The ‘Société Royale des Sciences de Liège" (hereafter the Society) regularly publishes in its ‘Bulletin" original scientific papers in the fields of astrophysics, biochemistry, biophysics, biology, chemistry, geology, mathematics, mineralogy or physics, following peer review approval.
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