Study investigates diffuse emission from the Cigar Galaxy arxiv
We present the first spatially resolved, X-ray spectroscopic study of the 4-8 keV diffuse emission found in the central part of the nearby starburst galaxy M82 on a few arcsecond scales. The new details that we see allow a number of important conclusions to be drawn on the nature of the hot gas and its origin as well as feedback on the ISM. We use archival data from Chandra with an exposure time of 570 ks. The Fexxv emission at 6.
Our decomposition of the diffuse emission spectrum indicates that ~70% of the 4-8 keV luminosity originates from the inverse Compton emission. The metal-rich hot gas with kT~5 keV makes a minor contribution to the 4-8 keV continuum, but it accounts for the majority of the observed Fexxv line. This hot gas appears to emerge from the circumnuclear starburst ring and fill the galactic chimneys identified as mid-infrared and radio emission voids.
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