TY  - GEN
A1  - Oskinova, Lida
A1  - Feldmeier, Achim
A1  - Kretschmar, Peter
T1  - Clumped stellar winds in supergiant high-mass X-ray binaries
T2  - Postprint der universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - 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.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 573 
KW  - accretion
KW  - instabilities
KW  - stars: mass loss
KW  - X-rays: binaries
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/41391
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-413916
SN  - 1866-8372
IS  - 573
SP  - 287
EP  - 288
ER  -