Summary
We present the results of a systematic morphological analysis of the X-ray emission of the hot interstellar medium (ISM) in 54 normal elliptical galaxies observed with the Chandra satellite. We find evidence for the gas not to be resting completely in hydrostatic equilibrium. In particular, we find that optical and X-ray ellipticities are uncorrelated, contrary to expectations from hydrostatic equilibrium. We also demonstrate that the degree of asymmetry in the gas correlates positively with both the 20 cm radio luminosity and the X-ray luminosity of the central point source, emphasizing the general importance of AGN feedback even in normal elliptical galaxies.
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Diehl, S., Statler, T.S. (2007). Morphological Signatures of AGN Feedback in the Hot Interstellar Medium of Normal Elliptical Galaxies. In: Böhringer, H., Pratt, G., Finoguenov, A., Schuecker, P. (eds) Heating versus Cooling in Galaxies and Clusters of Galaxies. Eso Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73484-0_29
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DOI: https://doi.org/10.1007/978-3-540-73484-0_29
Publisher Name: Springer, Berlin, Heidelberg
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