New Hot Subdwarf Variables from Gaia eDR3
Isaac D. Lopez,
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA and Department of Physics, High Point University, High Point, NC 27268, USA. Corresponding author: idlopez@iastate.edu
Alekzander Kosakowski,
Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA
Brad N. Barlow,
Department of Physics, High Point University, High Point, NC 27268, USA
Thomas Kupfer,
Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA
Abstract
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.
Pour citer cet article
Isaac D. Lopez, Alekzander Kosakowski, Brad N. Barlow & Thomas Kupfer, «New Hot Subdwarf Variables from Gaia eDR3», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 92 - Année 2023, Numéro 2 - Proceedings of the 10th Meeting on Hot Subdwarfs and Related Objects, 39-61 URL : https://popups.uliege.be/0037-9565/index.php?id=11220.