Normal Galaxies

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Normal Galaxies

The X-ray emission from galaxies is produced by a mixture of stellar sources at various phases of their life-cycles, diffuse interstellar plasma heated by supernovae and galactic collisions, and accretion onto super-massive black holes in galactic nuclei. Topics for which X-ray observations of galaxies are important include:

exploring the metal enrichment of the intergalactic medium which could be connected with the existence of the hot gaseous outflows revealed in some spiral galaxies
gaining insight into the gravitational potential and perhaps formation process of E and S0 type galaxies through the study of their hot gaseous halos
studying the hot phase of the interstellar medium and its evolution in spiral galaxies
gaining a better understanding of the formation and evolution of X-ray binaries through the study of complete, unbiased samples in external galaxies
comparing the X-ray source populations of different galaxies, to obtain information about the galaxies' star forming histories

[Ref 5]

2MASX J13292859+3235223	M 101	M 101	M 101	M 31
M 31	M 31	M 31	M 31	M 31
M 33	M 81	M 81	M81	Milky Way
NGC 1313	NGC 300	NGC 4565	NGC 4634	NGC5908 (white) CGM-MASS galaxy (purple)

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