X-ray Emission Mechanisms of LINERs |
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| Authors: | S Komossa D Breitschwerdt H Böhringer J Meerschweinchen |
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| Institution: | (1) Max-Planck-Inst. für extraterrestrische Physik, Postfach 1603, D-85740 Garching, Germany;(2) Weststrasse 19, 3063 Obernkirchen 2, Germany |
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| Abstract: | We present here an analysis of the X-ray properties of a sample of LINER galaxies observed with the ROSAT PSPC and HRI instruments. A spatial analysis shows that the bulk of the X-ray emission is consistent with arising from a
point source; some extended emission appears at weak emission levels. The X-ray spectra are formally best described by a power
law with photon indexΓx ≈ −2 or thermal emission from a Raymond-Smith plasma with highly subsolar abundances (Z ≤ 0.1).Several emission mechanisms that might contribute to the observed X-ray spectra are discussed. In particular, we take
the very subsolar abundances derived from Raymond-Smith fits as an indication of a more complex emission mechanism, like the
presence of a second hard component or plasma out of equilibrium.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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