X-ray emission mechanisms of liners

Autor(en)

Stefanie Komossa, Dieter Breitschwerdt, Hans Böhringer, J Meerschweinchen

Abstrakt

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(en)

Institut für Astrophysik

Externe Organisation(en)

Max-Planck-Institut für extraterrestrische Physik

Journal

Astrophysics and Space Science

Band

272

Seiten

295-298

Anzahl der Seiten

4

ISSN

0004-640X

DOI

https://doi.org/10.1023/A:1002617101356

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/xray-emission-mechanisms-of-liners(0598d459-5afa-4773-90ac-f3f8cc144082).html