Emission from Stars, Binaries, AGN and Hot Gas in Early-type Galaxies

Christine Jones, CfA

From Chandra observations of a large sample of nearby early type galaxies, we determine the fraction of the X-ray emission due to stars, low mass X-ray binaries and hot gas. In low mass galaxies such as M32 and NGC3379, the stars and binaries generally dominate the unresolved X-ray emission, while in massive galaxies, the emission is due primarily to hot interstellar gas. This hot gas provides a fossil record of the past activity of the AGN. For several galaxies, we also describe the impact of AGN outbursts on the hot gas, focussing primarily on IC1262, Cen A, NGC5813 and the Virgo galaxies NGC4636, NGC4472 and NGC4552.