Year: 2013
Type: preprint
Abstract: We started a new project which aims to find compact hot subdwarf binaries at low Galactic latitudes. Targets are selected from several photometric surveys and a spectroscopic follow-up campaign to find radial velocity variations on timescales as short as tens of minutes has been started. Once radial variations are detected phase-resolved spectroscopy is obtained to measure the radial velocity curve and the mass function of the system. The observing strategy is described and the discovery of two short period hot subdwarf binaries is presented. UVEXJ032855.25+503529.8 contains a hot subdwarf B star (sdB) orbited by a cool M-dwarf in a P=0.11017 days orbit. The lightcurve shows a strong reflection effect but no eclipses are visible. HS 1741+2133 is a short period (P=0.20 days) sdB most likely with a white dwarf (WD) companion.
Source: arXiv (Cornell University)
Authors: Kupfer, T., Geier, S., McLeod, A. Faye, Groot, P. J., Verbeek, K., Schaffenroth, V., Heber, U., Heuser, C., Ziegerer, E., Østensen, R., Nemeth, P., Dhillon, V. S., Butterley, T., Littlefair, S. P., Wilson, R. W., Telting, J. H., Shporer, A., Fulton, B. J.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W2141381623