Radial velocity survey of low-mass companions to sdB stars
Classen L, Geier S, Heber U, O'Toole SJ (2011)
Publication Type: Conference contribution
Publication year: 2011
Journal
Book Volume: 1331
Pages Range: 297-303
Conference Proceedings Title: AIP Conference Proceedings
ISBN: 9780735408869
DOI: 10.1063/1.3570989
Abstract
The origin of subdwarf B (sdB) stars is not fully understood yet since it requires high mass loss at the red giant stage. SdBs in close binary systems are formed via common envelope ejection, but the origin of apparently single sdB stars remains unclear. Substellar companions may be able to trigger common envelope ejection and help forming sdBs that appear to be single. Using a sample of high resolution spectra we aim at detecting small radial velocity (RV) shifts caused by such low mass (sub-)stellar companions. The RVs are measured with high accuracy using sharp metal lines. Our goal is to test the theoretical predictions and put constraints on the population of the lowest mass companions to sdB stars. © 2011 American Institute of Physics.
Authors with CRIS profile
Lew Classen
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Stephan Geier
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Ulrich Heber
Naturwissenschaftliche Fakultät
Involved external institutions
Australia (AU)How to cite
APA:
Classen, L., Geier, S., Heber, U., & O'Toole, S.J. (2011). Radial velocity survey of low-mass companions to sdB stars. In AIP Conference Proceedings (pp. 297-303).
MLA:
Classen, Lew, et al. "Radial velocity survey of low-mass companions to sdB stars." Proceedings of the International Conference "Planetary Systems Beyond the Main Sequence" 2011. 297-303.
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