Mathematics – Logic
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..126c&link_type=abstract
IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr
Mathematics
Logic
4
Cosmology, Gravitational Lenses, Quasars, Space Density, Amplification, Continuous Spectra, Mass Distribution
Scientific paper
Amplification of quasar light by a cosmological density of compact objects causes significant effects on many quasars in magnitude-limited samples. For lens masses solar mass less than 100,000 solar mass the continuum would be amplified by a magnitude or more but the line emission would not. Examination of the UV selected sample of Marshall et al. (1983) gives limits to more than 90 percent statistical confidence of Omega(c) less than 0.1 for a mass between 200 and 100,000 solar mass, where Omega(c) is the mean density of objects of mass M relative to the closure density. Preliminary results from an X-ray selected sample may probe to more than 0.1 solar mass and give a value for Omega(c) of less than one. These limits indicate that the remnants of an early population of massive stars cannot make a cosmologically significant contribution to the mass density of the universe. On a separate topic, recent work on the enhanced surface density of quasars near galaxies due to lensing by stars in the galaxy halos is reviewed.
No associations
LandOfFree
Gravitational lens effects of a cosmological density of compact objects 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 Gravitational lens effects of a cosmological density of compact objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational lens effects of a cosmological density of compact objects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1508097