Testing Slim-Disk Models on the Thermal Spectra of LMC X-3
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Straub, O.
Bursa, M.
Abramowicz, M. A.
Kluźniak, W.
Remillard, R. A.
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https://doi.org/10.1051/0004-6361/201117385Metadata
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Straub, O., M. Bursa, A. Sądowski, J. F. Steiner, M. A. Abramowicz, W. Kluźniak, J. E. McClintock, R. Narayan, and R. A. Remillard. 2011. Testing Slim-Disk Models on the Thermal Spectra of LMC X-3. Astronomy & Astrophysics 533: A67.Abstract
Slim-disk models describe advective accretion flows at high luminosities, while reducing to the standard thin disk form in the low luminosity limit. We have developed a new spectral model, slimbb, within the framework of XSPEC, which describes fully relativistic slim-disk accretion and includes photon ray-tracing that starts from the disk photosphere, rather than the equatorial plane. We demonstrate the features of this model by applying it to RXTE spectra of the persistent black-hole X-ray binary LMC X-3. LMC X-3 has the virtues of exhibiting large intensity variations while maintaining itself in soft spectral states which are well described using accretion-disk models, making it an ideal candidate to test the aptness of slimbb. Our results demonstrate consistency between the low-luminosity (thin-disk) and high luminosity (slim-disk) regimes. The results also illustrate that advection alone does not solve the problem of the origin of the surprisingly soft high-luminosity spectra in LMC X-3. We show that X-ray continuum-fitting in the high accretion rate regime can powerfully test black-hole accretion disk models.Other Sources
http://arxiv.org/pdf/1106.0009v1.pdfhttp://www.researchgate.net/profile/James_Steiner/publication/51909220_Testing_slim-disk_models_on_the_thermal_spectra_of_LMC_X-3/links/0c960515e74a766676000000
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