dc.contributor.author | Karl, C. | |
dc.contributor.author | Napiwotzki, R. | |
dc.contributor.author | Nelemans, G. | |
dc.contributor.author | Christlieb, N. | |
dc.contributor.author | Koester, D. | |
dc.contributor.author | Heber, U. | |
dc.contributor.author | Reimers, D. | |
dc.date.accessioned | 2007-12-17T09:56:56Z | |
dc.date.available | 2007-12-17T09:56:56Z | |
dc.date.issued | 2003-11 | |
dc.identifier.citation | Karl , C , Napiwotzki , R , Nelemans , G , Christlieb , N , Koester , D , Heber , U & Reimers , D 2003 , ' Binaries discovered by the SPY project. III. HE 2209-1444: A massive, short period double degenerate ' , Astronomy & Astrophysics , vol. 410 , pp. 663-669 . https://doi.org/10.1051/0004-6361:20031278 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | PURE: 144675 | |
dc.identifier.other | PURE UUID: 31673032-fc60-4350-9981-e5dd80a6e8f1 | |
dc.identifier.other | dspace: 2299/1207 | |
dc.identifier.other | Scopus: 0242291963 | |
dc.identifier.uri | http://hdl.handle.net/2299/1207 | |
dc.description | Original article can be found at: http://www.aanda.org/--Copyright The European Southern Observatory DOI : 10.1051/0004-6361:20031278 | |
dc.description.abstract | In the course of our search for double degenerate (DD) binaries as potential progenitors of type Ia supernovae with the UVES spectrograph at the ESO VLT (ESO SN Ia Progenitor surveY – SPY) we discovered HE2209−1444 to be a double-lined system consisting of two DA white dwarfs. From the analysis of the radial velocity curve we determined the period of the system to be P = 6h38m47s. The semi-amplitudes for both individual components are 109 km s−1 each. A model atmosphere analysis enabled us to derive individual temperatures for both components (8490 K and 7140 K, resp.) and masses of 0.58 M for each component. The total mass of the system is 1.15 ± 0.07 M . The system will lose angular momentum due to gravitational wave radiation and therefore will merge within 5 Gyrs – less than a Hubble time. HE 2209−1444 is the second massive, short period double degenerate detected by SPY. Its total mass is about 20% below the Chandrasekhar mass limit and therefore it does not qualify as a potentional SN Ia progenitor. However, together with our previous detections it supports the view that Chandrasekhar mass systems do exist. | en |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.title | Binaries discovered by the SPY project. III. HE 2209-1444: A massive, short period double degenerate | 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 | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | https://doi.org/10.1051/0004-6361:20031278 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |