English

BeppoSAX observation of Hercules A and MRC 0625-536

Astrophysics 2009-10-31 v1

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 0.22000.2 - 200 keV. Data analysis shows that the X-ray flux from Hercules A is consistent with a diffuse thermal plasma emitting at T45T \approx 4-5 keV with a possible, but somewhat uncertain, contribution of a softer component at T3T \approx 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 form an extended region and has been fitted to a thermal law with T5.7T \approx 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 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 \lapp10\lapp 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.

Keywords

Cite

@article{arxiv.astro-ph/0011455,
  title  = {BeppoSAX observation of Hercules A and MRC 0625-536},
  author = {E. Trussoni and L. Feretti and S. Massaglia and P. Parma},
  journal= {arXiv preprint arXiv:astro-ph/0011455},
  year   = {2009}
}

Comments

8 pages, 3 figures; to appear in Astronomy & Astrophysics