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| Format: | Artículo científico |
| Language: | pt |
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Universidade Nove de Julho
2006
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| Online Access: | https://www.redalyc.org/articulo.oa?id=81040206 |
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| _version_ | 1866814467253207040 |
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| author | Todd Henry |
| author_facet | Todd Henry |
| contents | Ages of white dwarf-red subdwarf systems Todd Henry John Subasavage Thom Beaulieu Hektor Monteiro Wei-Chun Jao Ingeniería Binaries Subdwarfs White dwarfs Aging estimates We provide the first age estimates for two recently discoveredwhite dwarf-red subdwarf systems, LHS 193AB and LHS300AB. These systems provide a new opportunity for linkingthe reliable age estimates for the white dwarfs to the (measurable)metallicities of the red subdwarfs. We have obtainedprecise photometry in the VJRKCIKCJH bands and spectroscopycovering from 6,000°A to 9,000°A (our spectral coverage)forthe two new systems, as well as for a comparison white dwarfmainsequence red dwarf system, GJ 283 AB. Using modelgrids, we estimate the cooling age as well as temperature, surfacegravity, mass, progenitor mass and total lifetimes of thewhite dwarfs. The results indicate that the two new systemsare probably ancient thick disk objects with ages of at least 6-9gigayears (Gyr). 2006 artículo científico 1678-5428 https://www.redalyc.org/articulo.oa?id=81040206 pt http://www.redalyc.org/revista.oa?id=810 Exacta application/pdf Universidade Nove de Julho Exacta (Brasil) Num.2 Vol.4 |
| format | Artículo científico |
| id | redalyc_81040206 |
| language | pt |
| publishDate | 2006 |
| publisher | Universidade Nove de Julho |
| spellingShingle | Ages of white dwarf-red subdwarf systems Todd Henry Ingeniería Binaries Subdwarfs White dwarfs Aging estimates Ages of white dwarf-red subdwarf systems Todd Henry John Subasavage Thom Beaulieu Hektor Monteiro Wei-Chun Jao Ingeniería Binaries Subdwarfs White dwarfs Aging estimates We provide the first age estimates for two recently discoveredwhite dwarf-red subdwarf systems, LHS 193AB and LHS300AB. These systems provide a new opportunity for linkingthe reliable age estimates for the white dwarfs to the (measurable)metallicities of the red subdwarfs. We have obtainedprecise photometry in the VJRKCIKCJH bands and spectroscopycovering from 6,000°A to 9,000°A (our spectral coverage)forthe two new systems, as well as for a comparison white dwarfmainsequence red dwarf system, GJ 283 AB. Using modelgrids, we estimate the cooling age as well as temperature, surfacegravity, mass, progenitor mass and total lifetimes of thewhite dwarfs. The results indicate that the two new systemsare probably ancient thick disk objects with ages of at least 6-9gigayears (Gyr). 2006 artículo científico 1678-5428 https://www.redalyc.org/articulo.oa?id=81040206 pt http://www.redalyc.org/revista.oa?id=810 Exacta application/pdf Universidade Nove de Julho Exacta (Brasil) Num.2 Vol.4 |
| title | Ages of white dwarf-red subdwarf systems |
| topic | Ingeniería Binaries Subdwarfs White dwarfs Aging estimates |
| url | https://www.redalyc.org/articulo.oa?id=81040206 |