Hard and soft spectral states of ULXs
I discuss some differences between the observed spectral states of ultraluminous X-ray sources (ULXs) and the canonical scheme of spectral states defined in Galactic black holes. The standard interpretation of ULXs with a curved spectrum, or a moderately steep power-law with soft excess and high-ene...
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| Format: | Journal Article |
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Wiley - V C H Verlag GmbH & Co. KGaA
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/39815 |