X-ray emission mechanisms of liners
- Author(s)
- Stefanie Komossa, Dieter Breitschwerdt, Hans Böhringer, J Meerschweinchen
- 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 powerlaw with photon index GX ˜ -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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Max-Planck-Institut für extraterrestrische Physik
- Journal
- Astrophysics and Space Science
- Volume
- 272
- Pages
- 295-298
- No. of pages
- 4
- ISSN
- 0004-640X
- DOI
- https://doi.org/10.1023/A:1002617101356
- Publication date
- 2000
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/xray-emission-mechanisms-of-liners(0598d459-5afa-4773-90ac-f3f8cc144082).html