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Clumped stellar winds in supergiant high-mass X-ray binaries

  • The clumping of massive star winds is an established paradigm, which is confirmed by multiple lines of evidence and is supported by stellar wind theory. We use the results from time-dependent hydrodynamical models of the instability in the line-driven wind of a massive supergiant star to derive the time-dependent accretion rate on to a compact object in the Bondi-Hoyle-Lyttleton approximation. The strong density and velocity fluctuations in the wind result in strong variability of the synthetic X-ray light curves. Photoionization of inhomogeneous winds is different from the photoinization of smooth winds. The degree of ionization is affected by the wind clumping. The wind clumping must also be taken into account when comparing the observed and model spectra of the photoionized stellar wind.

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Metadaten
Author details:Lida M. OskinovaORCiD, Achim FeldmeierORCiDGND, Peter KretschmarORCiD
URN:urn:nbn:de:kobv:517-opus4-413916
DOI:https://doi.org/10.25932/publishup-41391
ISSN:1866-8372
Title of parent work (English):Postprint der universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
Publication series (Volume number):Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (573)
Publication type:Postprint
Language:English
Date of first publication:2019/02/05
Publication year:2012
Publishing institution:Universität Potsdam
Release date:2019/02/05
Tag:X-rays: binaries; accretion; instabilities; stars: mass loss
Issue:573
Number of pages:2
First page:287
Last Page:288
Source:Proceedings of the International Astronomical Union 8 (2012) Symposium 290 pp. 287-288 DOI 10.1017/S1743921312020042
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät
DDC classification:5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften
Peer review:Referiert
Publishing method:Open Access
Grantor:Cambridge University Press (CUP)
License (German):License LogoKeine öffentliche Lizenz: Unter Urheberrechtsschutz
External remark:Bibliographieeintrag der Originalveröffentlichung/Quelle
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