Optical Ensemble Variability of Low to Moderate Redshift Galaxies in the Sloan Digital Sky Survey

Details Optical Ensemble Variability of Low to Moderate Redshift Galaxies in the Sloan Digital Sky Survey Optical Ensemble Variability of Low to Moderate Redshift Galaxies in the Sloan Digital Sky Survey

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7219d&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #72.19; Bulletin of the American Astronomical Society, V

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Using a large sample of 5,843 galaxies with a wide range of redshifts, we conduct statistical analyses correlating the ensemble variability with both rest frame time lag (the structure function) and the absolute magnitude of the galaxies. Since these objects have spectral features of quasars, but morphologically appear to be galaxies, they are likely to be a lower luminosity form of active galactic nuclei within visible hosts. We find that the structure function of lower-luminosity AGN follows the same general trend as that of quasars, which have been the focus of previous studies. Additionally, there is a correlation observed between ensemble variability and absolute magnitude.

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