Bulletin de la Société Royale des Sciences de Liège

0037-9565 1783-5720

 

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Isaac D. LOPEZ, Alekzander KOSAKOWSKI, Brad N. BARLOW & Thomas KUPFER

New Hot Subdwarf Variables from Gaia eDR3

(Volume 92 - Année 2023 — Numéro 2 - PROCEEDINGS OF THE 10TH MEETING ON HOT SUBDWARFS AND RELATED OBJECTS)
DOI: 10.255118/0037-9565.11220
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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.

1Article publié selon les termes et les conditions de la licence Creative Commons CC-BY 4.0

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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, 1-23 URL : https://popups.uliege.be/0037-9565/index.php?id=11220.

A propos de : 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, idlopez@iastate.edu

A propos de : Alekzander KOSAKOWSKI

Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA

A propos de : Brad N. BARLOW

Department of Physics, High Point University, High Point, NC 27268, USA

A propos de : Thomas KUPFER

Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA