MG14 - Talk detail |
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Participant |
Fabrika, Sergei | |||||||
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Institution |
Special Astrophysical Observatory - Bukovo - Nizhnij Arkhyz - Karachai-Cherkess Repb. - Russia | |||||||
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Session |
AC1 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Ultraluminous X-ray Sources as Super-Eddington Accretion Disks | |||||
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Abstract |
The origin of Ultraluminous X-ray sources (ULXs) in external galaxies whose X-ray luminosities exceed those of the brightest black holes in our Galaxy by hundreds and thousands of times is mysterious. The most popular models for the ULXs involve either intermediate mass black holes (IMBHs) with standard accretion disks or stellar-mass black holes (~10 solar masses) accreting at super-Eddington rates. Here we review the ULX properties, their X-ray spectra indicate a presence of hot winds in their accretion disks supposing the supercritical accretion. However, the strongest evidences come from optical spectroscopy. The spectra of the ULX counterparts are very similar to that of SS 433, the only known supercritical accretor in our Galaxy. |
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