An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton

Details An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton

2003-06-26

arxiv.org/abs/astro-ph/0306550v1

Astron.Astrophys.408:119-126,2003

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Astronomy and Astrophysics; 8 pages, 5 figures

Scientific paper

10.1051/0004-6361:20030950

We present an XMM-Newton observation of the radio-quiet quasar Q0056-363 (z=0.162). This is the first time that this quasar is observed in the hard X-ray range (above 2 keV). We find that Q0056-363 is a powerful X-ray quasar, with a 0.3-12 keV unabsorbed luminosity of about 1.2 x 10^45 erg s-1 with the largest part (~67%) emitted below 2 keV. The spectrum reveals a large featureless soft X-ray excess below 2 keV and a strong broad FeKalpha line at 6.4 keV (in the quasar frame). The FeK alpha line is due to low to moderate ionization states of iron (i.e., < Fe XVII), with an equivalent width of about 250 eV and a velocity width of about 25,000 km s-1. Q0056-363 is presently the most luminous AGN known to exhibit such a broad and intense FeKalpha line profile from near neutral iron. The line can be fitted with a relativistic profile from an accretion disc around either a Schwarzschild (non-rotating) or a Kerr (rotating) black hole. A combination of two thermal Comptonization components and a disc reflection model is favored to explain both the continuum over the energy range 0.3-12 keV and the FeK alpha line. A patchy corona covering a large part of the inner disc surface is needed in order to be compatible with the accretion rate inferred from the spectral energy distribution of Q0056-363, unless the mass of the black hole is much higher than about 5 x 10^8 M_odot.

Affiliated with

Also associated with

No associations

Rating

An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An intense and broad FeKalpha line observed in the X-ray luminous quasar Q0056-363 with XMM-Newton will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-187582