The line-locking hypothesis, absorption by intervening galaxies, and the Z = 1.95 peak in redshifts

Details The line-locking hypothesis, absorption by intervening galaxies, and the Z = 1.95 peak in redshifts The line-locking hypothesis, absorption by intervening galaxies, and the Z = 1.95 peak in redshifts

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phys...17..237b&link_type=abstract

(Niels Bohr Institut, Teknisk Videnskabelige Forskningsrad, and Nordisk Institut for Teoretisk Atomfysik, Symposium on Quasars a

Other

26

Absorption Spectra, Galactic Clusters, Intergalactic Media, Quasars, Red Shift, Astronomical Spectroscopy, Cross Sections, Emission Spectra, Histograms, Hypotheses, Line Spectra, Locking

Scientific paper

The controversy over whether the absorption spectrum in QSOs is intrinsic or extrinsic is approached with attention to the peak of redshifts at z = 1.95. Also considered are the line-locking and the intervening galaxy hypotheses. The line locking hypothesis is based on observations that certain ratios found in absorption line QSOs are preferred, and leads inevitably to the conclusion that the absorption line systems are intrinsic. The intervening galaxy hypothesis is based on absorption redshifts resulting from given absorption cross-sections of galactic clusters and the intergalactic medium, and would lead to the theoretical conclusion that most QSOs show strong absorption, a conclusion which is not supported by empirical data. The 1.95 peak, on the other hand, is most probably an intrinsic property of QSOs. The peak is enhanced by redshift, and it is noted that both an emission and an absorption redshift peak are seen at 1.95.

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