X-ray evidence of an AGN in M82

Mathematics – Logic

Scientific paper

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Galactic Nuclei, Circumnuclear Matter, And Bulges, X-Ray Sources, X-Ray Bursts, Irregular And Morphologically Peculiar Galaxies

Scientific paper

M82, which is the most famous starburst galaxy, shows hard X-ray emission. However, the origin of the hard component is unclear. Therefore, we conducted a monitoring observation of M82 with ASCA in 1996. A significant time variability of the hard component was found between 3×1040 erg/s and 1×1041 erg/s on various time scales from 10 ks to a month. This strongly suggests that a low-luminosity AGN (LLAGN) exists in M82. A broad iron line emission was found, which is similar to other LLAGNs. .

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