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

AIP Conference Proceedings AIP Publishing

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

Australian Astronomical Observatory AU 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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