Optical spectral variability of PG QSOs
Astrophysics
2007-05-23 v1
Abstract
In previous studies we have shown that the optical variability of quasars increases, on average, with redshift. We explained this dependance in terms of a hardening of the spectrum during bright phases, coupled with the increase of the rest-frame frequency for increasing redshift. We re-analize now these correlations on the basis of new light curves of PG quasars, recently published by the Wise Observatory group.
Cite
@article{arxiv.astro-ph/0011076,
title = {Optical spectral variability of PG QSOs},
author = {D. Trevese and F. Vagnetti},
journal= {arXiv preprint arXiv:astro-ph/0011076},
year = {2007}
}
Comments
3 pages, 3 figures, Guillermo Haro Advanced Lectures on the Starburst-AGN Connection, Tonantzintla, Mexico, June 26-30 2000