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Testing wind as an explanation for the spin problem in the continuum-fitting method
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SYSNO ASEP 0463886 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Testing wind as an explanation for the spin problem in the continuum-fitting method Tvůrce(i) You, B. (PL)
Straub, O. (PL)
Czerny, B. (PL)
Sobolewska, M. (PL)
Rózanska, A. (PL)
Bursa, Michal (ASU-R) RID, ORCID
Dovčiak, Michal (ASU-R) RID, ORCIDZdroj.dok. Astrophysical Journal - ISSN 0004-637X
Roč. 821, č. 2 (2016), 104/1-104/15Poč.str. 15 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova accretion disks ; black hole physics ; X-rays binaries Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Institucionální podpora ASU-R - RVO:67985815 UT WOS 000377102700033 EID SCOPUS 84969724123 DOI 10.3847/0004-637X/821/2/104 Anotace The continuum-fitting method is one of the two most advanced methods of determining the black hole spin in accreting X-ray binary systems. There are, however, still some unresolved issues with the underlying disk models. One of these issues manifests as an apparent decrease in spin for increasing source luminosity. Here, we perform a few simple tests to establish whether outflows from the disk close to the inner radius can address this problem. We employ four different parametric models to describe the wind and compare these to the apparent decrease in spin with luminosity measured in the sources LMC X-3 and GRS 1915+105. Wind models in which parameters do not explicitly depend on the accretion rate cannot reproduce the spin measurements. Models with mass accretion rate dependent outflows, however, have spectra that emulate the observed ones. The assumption of a wind thus effectively removes the artifact of spin decrease. This solution is not unique; the same conclusion can be obtained using a truncated inner disk model. To distinguish among the valid models, we will need high-resolution X-ray data and a realistic description of the Comptonization in the wind. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2017
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