Mathematics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266l..73m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 266, Mar. 15, 1983, p. L73-L77. Research supported by the Servizio A
Mathematics
29
Active Galactic Nuclei, Cosmology, Galactic Evolution, Luminosity, Quasars, X Ray Sources, Functions (Mathematics), Spatial Distribution
Scientific paper
The cosmological evolution and the X-ray luminosity function of X-ray selected active galactic nuclei (AGNs) are derived and discussed. The sample used consists of 31 AGNs extracted from a fully identified sample of X-ray sources from the Einstein Observatory Medium Sensitivity Survey and is therefore exclusively defined by its X-ray properties. The distribution in space is found to be strongly nonuniform. The amount of cosmological evolution required by the X-ray data is derived in the framework of pure luminosity evolution and is found to be smaller than the amount determined from optically selected samples. The X-ray luminosity function is derived. It can be satisfactorily represented by a single power law only over a limited range of absolute luminosities. Evidence that the luminosity function flattens at low luminosity or steepens at high luminosity, or both, is presented and discussed.
Avni Yoav
Danziger John
Gioia Isabella Maria
Giommi Paolo
Griffiths Richard E.
No associations
LandOfFree
The cosmological evolution and luminosity function of X-ray selected active galactic nuclei 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 The cosmological evolution and luminosity function of X-ray selected active galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The cosmological evolution and luminosity function of X-ray selected active galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1466043