Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.0206n&link_type=abstract
American Astronomical Society, HEAD meeting #4, #02.06; Bulletin of the American Astronomical Society, Vol. 31, p.697
Astronomy and Astrophysics
Astronomy
Scientific paper
Spectrum of Seyfert 1 Galaxies (S1G hereafter) is very similar to that of several Galactic Black Hole Candidates (GBHCs) in their hard state, suggestive that both classes of objects have similar physical processes. However, recent work has shown that reprocessing features make the patchy corona-disk model problematic for GBHCs. To address the similarities and differences in spectrum of Seyferts and GBHCs, we consider the structure of the ionized X-ray skin near an active magnetic flare. We show that the X-ray skin is subject to a thermal instability, similar in nature to the well known ionization instability of quasar emission line regions. Due to the much higher ionizing X-ray flux in GBHCs, the only stable solution for the upper layer of the accretion disk is that in which it is highly ionized and is at the Compton temperature ( ~ few keV).We show that this may account for the difference in spectrum of GBHCs and S1G. In addition, same instability, applied to S1G, leads to the X-ray skin temperature being in the range T ~ 1-3x 10(5) Kelvin in a rather broad parameter space, which then may explain the observed spectral shape of BBB in Seyfert Galaxies. We also show that in more luminous AGN, this relatively low temperature and low ionization parameter solution disappears, and one expects to recover the same solution as that for GBHCs in the hard state. We propose that the latter effect explains the abrupt dissapearance of the iron line in the high luminosity AGN.
No associations
LandOfFree
Influence of the Ionization Pressure Instability on the reflection and iron lines in AGN and GBHCs 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 Influence of the Ionization Pressure Instability on the reflection and iron lines in AGN and GBHCs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of the Ionization Pressure Instability on the reflection and iron lines in AGN and GBHCs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-888783