BeppoSAX observations of Narrow-Line Seyfert 1 galaxies. II. Ionized iron features in Arakelian 564
Abstract
The BeppoSAX observations of the bright Narrow-Line Seyfert 1 galaxy Ark 564 are presented along with a high quality optical spectrum taken at the 1.5 m telescope at La Silla. The 0.1-10 keV X-ray spectrum is characterized by a strong soft component which is best described by blackbody-like emission with a temperature of ~ 160 eV. At higher energies a steep (Gamma =~ 2.4) power-law tail is present. There is evidence of an ionized reflector in the form of an iron line and edge. We do not find significant evidence of soft X-ray features if the spectrum is modelled with a two component continuum. The optical and X-ray spectral properties support the hypothesis of a high accretion rate onto a low mass black hole.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2001
- DOI:
- 10.1051/0004-6361:20000152
- arXiv:
- arXiv:astro-ph/0010476
- Bibcode:
- 2001A&A...365..400C
- Keywords:
-
- X-RAYS: GALAXIES;
- GALAXIES: SEYFERT;
- GALAXIES: INDIVIDUAL: ARK 564;
- Astrophysics
- E-Print:
- 9 pages, 7 figures, accepted by Astronomy and Astrophysics