Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies

Details Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8414082p&link_type=abstract

Unknown

Astronomy and Astrophysics

Astronomy

Galactic Nuclei, Luminosity, Quasars, Seyfert Galaxies, X Ray Spectra, Emission Spectra, Heao 2, Intergalactic Media, Line Spectra, X Ray Astronomy, X Ray Sources

Scientific paper

Results of the analysis of 28 Einstein SSS observations of 15 high X-ray luminosity (L(x) 10 to the 435 power erg/s) quasars and Seyfert type 1 nuclei are presented. The 0.75-4.5 keV spectra are in general well fit by a simple model consisting of a power law plus absorption by cold gas. The averager spectral index alpha is 0.66 + or - .36, consistent with alpha for the spectrum of these objects above 2 keV. In all but one case, no evidence was found for intrinsic absorption, with an upper limit of 2 x 10 to the 21st power/sq cm. Neither was evidence found for partial covering of the active nucleus by dense, cold matter (N(H) 10 to the 22nd power/sq cm; the average upper limit on the partial covering fraction is 0.5. There is no obvious correlation between spectral index and 0175-4.5 keV X-ray luminosity (which ranges from 3 x 10 to the 43rd to 47th powers erg/s or with other source properties. The lack of intrinsic X-ray absorption allows us to place constraints on the density and temperature of the broad-line emission region, and narrow line emission region, and the intergalactic medium.

Affiliated with

Also associated with

No associations

Rating

Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies 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 Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft X-ray spectral observations of quasars and high X-ray luminosity Seyfert galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1488843