BeppoSAX observation of Hercules A and MRC 0625-536
Abstract
We present BeppoSAX observations of the two FR I type radio galaxies Hercules A (3C 348) and MRC 0625-536 in the energy range 0.2-200 keV. Data analysis shows that the X-ray flux from Hercules A is consistent with a diffuse thermal plasma emitting at T ~ 4-5 keV with a possible, but somewhat uncertain, contribution of a softer component at T ~ 3 keV. The non thermal emission from the active nucleus must be significantly smaller than the thermal one, and no indication of relevant core obscuration by a surrounding torus was detected. The flux from MRC 0625-536 originates from an extended region and has been fitted to a thermal law with T ~ 5.7 keV and with a column density consistent with the galactic absorption. A spatially resolved spectral analysis does not show a relevant variation of the temperature and of the metallicity across the diffuse emission zone. A non thermal spectral component, related to the nuclear activity, may be present in the innermost region with some possible amount of local obscuration, contributing la 10% to the total luminosity. Hard X-ray emission from MRC 0625-536 has been detected in the PDS (15-200 keV) that may be related either to its galactic core or to the intracluster region.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 2001
- DOI:
- 10.1051/0004-6361:20000334
- arXiv:
- arXiv:astro-ph/0011455
- Bibcode:
- 2001A&A...366..788T
- Keywords:
-
- GALAXIES: ACTIVE;
- GALAXIES: CLUSTERS: INDIVIDUAL: A 3391;
- GALAXIES: INDIVIDUAL: HERCULES A;
- MRC 0625-536;
- GALAXIES: NUCLEI;
- X-RAYS: GALAXIES;
- Astrophysics
- E-Print:
- 8 pages, 3 figures