Optical spectral variability of PG QSOs

Details Optical spectral variability of PG QSOs Optical spectral variability of PG QSOs

2000-11-03

arxiv.org/abs/astro-ph/0011076v1

Astronomy and Astrophysics

Astrophysics

3 pages, 3 figures, Guillermo Haro Advanced Lectures on the Starburst-AGN Connection, Tonantzintla, Mexico, June 26-30 2000

Scientific paper

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.

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