Determining the cosmological parameters from the linewidths of active galaxies

Details Determining the cosmological parameters from the linewidths of active galaxies Determining the cosmological parameters from the linewidths of active galaxies

1999-05-13

arxiv.org/abs/astro-ph/9905165v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS. 8 pages LaTeX, uses mn.sty

Scientific paper

10.1046/j.1365-8711.1999.02802.x

We have previously shown that the linewidth distribution in AGN can be accounted for by an axisymmetric broad emission line region. In this paper we show that the linewidth distribution changes with redshift and that these changes are dependent on H_0 and q_0. We show that relatively small samples of AGN at high redshift with measured linewidth at half maximum can be used to distinguish between values of H_0 and q_0. Furthermore larger low redshift samples can be used to distinguish between luminosity functions and hence different models of quasar evolution.

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