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.
Author details: | Lidia M. OskinovaORCiDGND, Achim FeldmeierORCiDGND, Peter KretschmarORCiD |
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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): | Keine öffentliche Lizenz: Unter Urheberrechtsschutz |
External remark: | Bibliographieeintrag der Originalveröffentlichung/Quelle |