title   
  

On the outbursts of black hole soft x-ray transients

Ertan, Ünal and Alpar, M. Ali (2002) On the outbursts of black hole soft x-ray transients. Astronomy and Astrophysics, 393 (1). pp. 205-214. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361:20020998

Abstract

We suggest a new scenario to explain the outburst light curves of black hole soft X-ray transients together with the secondary maximum and the bump seen on their decay phases. Our explanations are based on the disk instability models considering the effect of X-ray irradiation. The scenario is consistent with the observed X-ray delays by a few days with respect to the optical rise for both the main outburst and the later maxima. We test our scenario by numerically solving the disk diffusion equation. The obtained model curve fits well to the observed X-ray outburst photon flux curve of the black hole soft X-ray transient GS/GRS 1124-68, a typical representative of the four BH SXTs with very similar light curves.

Item Type:Article
Uncontrolled Keywords:accretion; accretion disks; instabilities; stars : binaries : cose; X-rays : general
Subjects:Q Science > QB Astronomy
Q Science > QC Physics
ID Code:13573
Deposited By:Ünal Ertan
Deposited On:21 Dec 2009 22:43
Last Modified:25 May 2011 14:06

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