Characteristics of the X-ray Spectrum of the Ultra-Luminous X-ray Object in M82

Details Characteristics of the X-ray Spectrum of the Ultra-Luminous X-ray Object in M82 Characteristics of the X-ray Spectrum of the Ultra-Luminous X-ray Object in M82

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001tysc.confe.148m&link_type=abstract

Two Years of Science with Chandra, Abstracts from the Symposium held in Washington, DC, 5-7 September, 2001, meeting abstract.

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Black Hole And Neutron Star Binaries

Scientific paper

We discovered an Ultra Luminous X-ray source (ULX) in M82 with the Chandra HRC (Matsumoto et al. 2001; Kaaret et al. 2001). The source is a strong candidate for an Intermediate-Mass Black Hole. The X-ray luminosity of the ULX reached 1041 erg s-1, and the source is considered to be an extreme version of ULXs found in other galaxies (e.g. Makishima et al. 2000). However, we found that the ASCA spectrum of the M82 ULX can be fitted with either a thermal bremsstrahlung model or a multi-color disk model, and in either case its temperature is not correlated with its X-ray luminosity. This is quite different from the characteristics of the ULXs in other galaxies, and the M82 ULX may be distinctly different from other ULXs.

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