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URN: urn:nbn:de:kobv:517-opus-18115
URL: http://opus.kobv.de/ubp/volltexte/2008/1811/
Cohen, D. H. ;
Leutenegger, M. A. ;
Townsend, R. H. D.
Quantitative analysis of resolved X-ray emission line profiles of O stars
Kurzfassung in Englisch
By quantitatively fitting simple emission line profile models that include both atomic opacity and porosity to the Chandra X-ray spectrum of ζ Pup, we are able to explore the trade-offs between reduced mass-loss rates and wind porosity. We find that reducing the mass-loss rate of ζ Pup by roughly a factor of four, to 1.5 × 10−6 M⊙ yr−1, enables simple non-porous wind models to provide good fits to the data. If, on the other hand, we take the literature mass-loss rate of 6×10−6 M⊙ yr−1, then to produce X-ray line profiles that fit the data, extreme porosity lengths – of h∞ ≈ 3 R∗ – are required. Moreover, these porous models do not provide better fits to the data than the non-porous, low optical depth models. Additionally, such huge porosity lengths do not seem realistic in light of 2-D numerical simulations of the wind instability.
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RVK - Regensburger Verbundklassifikation: |
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US 1999.07 |
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Collection 1: |
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Universität Potsdam / Tagungen / Clumping in hot-star winds: International Workshop, Potsdam, Germany, 18. - 22. June 2007 / Talks and Discussions (organized by sections) / X-rays |
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Collection 2: |
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Universität Potsdam / Tagungen / Clumping in hot-star winds: International Workshop, Potsdam, Germany, 18. - 22. June 2007 / Talks and Discussions (in alphabetical order) |
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Collection 3: |
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Universität Potsdam / Tagungen / Clumping in hot-star winds: International Workshop, Potsdam, Germany, 18. - 22. June 2007 |
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Institut: |
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Extern |
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DDC-Sachgruppe: |
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Astronomie |
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Dokumentart: |
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c InProceedings (Aufsatz / Paper einer Konferenz etc.) |
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Sprache: |
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Englisch |
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Erstellungsjahr: |
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2007 |
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Publikationsdatum: |
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25.04.2008 |
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Bemerkung: |
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The complete edition of the proceedings "Clumping in hot-star winds" is available:
urn:nbn:de:kobv:517-opus-13981 |
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Lizenz: |
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Keine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht
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