dc.contributor.author | Heber, U. | |
dc.contributor.author | Drechsel, H. | |
dc.contributor.author | Karl, C. | |
dc.contributor.author | Ostensen, R. | |
dc.contributor.author | Folkes, S. | |
dc.contributor.author | Napiwotzki, R. | |
dc.contributor.author | Altmann, M. | |
dc.contributor.author | Cordes, O. | |
dc.contributor.author | Solheim, J.E. | |
dc.contributor.author | Voss, B. | |
dc.contributor.author | Koester, D. | |
dc.date.accessioned | 2008-01-30T10:37:01Z | |
dc.date.available | 2008-01-30T10:37:01Z | |
dc.date.issued | 2005 | |
dc.identifier.citation | Heber , U , Drechsel , H , Karl , C , Ostensen , R , Folkes , S , Napiwotzki , R , Altmann , M , Cordes , O , Solheim , J E , Voss , B & Koester , D 2005 , The Mass of the sdB Primary of the Binary HS 2333+3927 . in In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Papers 334 . Astronomical Society of the Pacific , pp. 357-362 . | |
dc.identifier.isbn | 1-58381-197-4 | |
dc.identifier.isbn | 978-1-58381-268-6 | |
dc.identifier.other | dspace: 2299/1446 | |
dc.identifier.uri | http://hdl.handle.net/2299/1446 | |
dc.description | Original paper can be found at: http://www.astrosociety.org/pubs/cs/328.html--Copyright Astronomical Society of the Pacific | |
dc.description.abstract | Short period sdB binaries with cool companions are crucial to understand pre-CV evolution, because they will evolve into cataclysmic variables, when the sdB will have left the extended horizontal branch. Recently we discovered the sixth such system, HS 2333+3927, consisting of an sdB star and an M dwarf (period: 0.172 d) with a very strong re°ection e®ect, but no eclipses. The re°ection is stronger than in any of the other similar systems which renders a quantitative spectral analysis very di±cult because the Balmer line pro¯les may be disturbed by the re°ected light. A spectroscopic analysis results in Te® = 36 500 K, log g = 5.70, and log(nHe=nH) = ¡2:15. Mass-radius relations were derived from the results of the analysis of light and radial-velocity curves. Comparison with the mass-radius relation derived from the surface gravity of the sdB star favours a rather low mass of 0.38 M¯ for the primary. The mass of the companion is 0.29 M¯. HS 2333+3927 is the only known sdB+dM system with a period above the CV period gap. | en |
dc.format.extent | 255214 | |
dc.language.iso | eng | |
dc.publisher | Astronomical Society of the Pacific | |
dc.relation.ispartof | In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Papers 334 | |
dc.title | The Mass of the sdB Primary of the Binary HS 2333+3927 | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
rioxxterms.type | Other | |
herts.preservation.rarelyaccessed | true | |