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Short-period AM CVn systems as optical, X-ray and gravitational-wave sources

Nelemans, G. ; Yungelson, L. R. ; Portegies Zwart, S. F.

Monthly notices of the Royal Astronomical Society, 2004-03, Vol.349 (1), p.181-192 [Periódico revisado por pares]

23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803: Blackwell Science Ltd

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  • Título:
    Short-period AM CVn systems as optical, X-ray and gravitational-wave sources
  • Autor: Nelemans, G. ; Yungelson, L. R. ; Portegies Zwart, S. F.
  • Assuntos: binaries: close ; gravitational waves ; white dwarfs
  • É parte de: Monthly notices of the Royal Astronomical Society, 2004-03, Vol.349 (1), p.181-192
  • Notas: istex:83F42B2C9AC5F1EECCADE22D33F53EA39BF35D25
    ArticleID:MNR7479
    ark:/67375/WNG-ZC099TCX-H
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: Abstract We model the population of AM CVn systems in the Galaxy and discuss the detectability of these systems with optical, X-ray and gravitational-wave detectors. We concentrate on the short-period (P < 1500 s) systems, some of which are expected to be in a phase of direct-impact accretion. Using a self-consistent model for the star-formation history and radial distribution of stars in the Galaxy plus simple models for the emission of optical and X-ray radiation from the AM CVn systems and interstellar absorption, we derive the sample of short-period AM CVn systems that can be detected in the optical and/or X-ray bands. At the shortest periods, the detectable systems are all X-ray sources, some with periods as short as three minutes. At periods above 10 min, most detectable systems are optical sources. About one-third of the X-ray sources are also detectable in the optical band. We also calculate the gravitational-wave signal of the short-period AM CVn systems. We find that potentially several thousand AM CVn systems can be resolved by the gravitational-wave detector Laser Interferometer Space Antenna (LISA), comparable to the expected number of detached double white dwarfs that can be resolved. We estimate that several hundreds of the AM CVn systems resolvable by LISA are also detectable in the optical and/or X-ray bands.
  • Editor: 23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803: Blackwell Science Ltd
  • Idioma: Inglês
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