2005/12/15 by C. Karl, Karl, C., U. Heber +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0512388
8 pages, 3 figures, to be published in Proceedings of the Second Meeting on Hot Subdwarf Stars and Related Objects, La Palma, Baltic Astronomy (in press)
arxiv created 2005/12/15 · openalex publication_date 2005/12/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the course of our search for double degenerate binaries as potential progenitors of type Ia supernovae with the ESO VLT (ESO SN Ia Progenitor SurveY SPY) several new subdwarf B (sdB) binaries with sdB primary components were discovered. In this paper, we present detailed analyses of six radial velocity variable sdB stars. Radial velocity curves have been measured. From the mass functions we derive lower limits to the masses of the unseen companions and we discuss their nature. In addition, stellar parameters like effective temperatures, surface gravities and helium abundances were determined as well as metal abundances.