Properties of Hot Subdwarfs in the GALEX Survey

0388507 - ASÚ 2013 RIV US eng C - Conference Paper (international conference)
Németh, Péter - Kawka, Adela - Vennes, Stephane
Properties of Hot Subdwarfs in the GALEX Survey.
Fifth Meeting on Hot Subdwarf Stars and Related Objects. San Francisco: Astronomical Society of the Pacific, 2012 - (Kilkenny, D.), s. 33-40. ASP Conference Series, 452. ISBN 9781583817872.
[Meeting on Hot Subdwarf Stars and Related Objects /5th/. Western Cape (ZA), 25.07.2011-29.07.2011]
R&D Projects: GA ČR GAP209/10/0967; GA AV ČR(CZ) IAA300030908; GA AV ČR IAA301630901
Institutional research plan: CEZ:AV0Z10030501
Keywords : Be stars * blanketed model atmospheres * IA progenitor survey
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

We have analyzed a sample of hot subdwarfs (sdB, sdO) selected from the GALEX ultraviolet sky survey. Applying a model atmosphere analysis we determined the temperature, surface gravity, and helium-to-hydrogen abundance ratio, and obtained preliminary constraints on the CNO abundance for a sample of 181 stars. Adopting colourimetric (ultraviolet-infrared) and quantitative spectral decomposition we also investigated the incidence of solar type or earlier (A, F, G) companions.
Permanent Link: http://hdl.handle.net/11104/0217407