Radial Velocity Survey of Low‐Mass Companions to sdB Stars

Language
en
Document Type
Article
Issue Date
2012-11-05
Issue Year
2011
Authors
Classen, Lew
Geier, Stephan
Heber, Ulrich
O’Toole, Simon J.
Editor
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.

Journal Title
AIP Conference Proceedings 1331 (2011): S. 297-303. 05.11.2012 <http://proceedings.aip.org/resource/2/apcpcs/1331/1/297_1>
Citation
AIP Conference Proceedings 1331 (2011): S. 297-303. 05.11.2012 <http://proceedings.aip.org/resource/2/apcpcs/1331/1/297_1>
DOI
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