We present a combined analysis of the optical spectral variability for two samples of QSOs, 42 objects at z < 0.4 monitored at the Wise Observatory, plus 59 objects up to z approximate to 3 in the field of the Magellanic Clouds, detected and/or monitored within the MACHO Project database. Our analysis shows some increase of the observed spectral variability as a function of redshift, with a large scatter. These data are compared with a model based on the addition of flares of different, temperatures to a stationary quasar SED, also taking into account the intrinsic scatter of the SEDs.
Vagnetti, F., Trevese, D. (2006). Redshift dependence of QSO spectral variability. In AGN Variability From X-Rays to Radio Waves (pp.33-36). SAN FRANCISCO : ASTRONOMICAL SOC PACIFIC.
Redshift dependence of QSO spectral variability
VAGNETTI, FAUSTO;
2006-01-01
Abstract
We present a combined analysis of the optical spectral variability for two samples of QSOs, 42 objects at z < 0.4 monitored at the Wise Observatory, plus 59 objects up to z approximate to 3 in the field of the Magellanic Clouds, detected and/or monitored within the MACHO Project database. Our analysis shows some increase of the observed spectral variability as a function of redshift, with a large scatter. These data are compared with a model based on the addition of flares of different, temperatures to a stationary quasar SED, also taking into account the intrinsic scatter of the SEDs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
