The variability of 30 PG quasars has been observed in the red band during 3 years. A rest-frame structure function analysis shows an increase of variability with the time interval up to 0.2 mag rms after 2 years. A comparison with the IUE data available for PG quasars shows that the variability increases with the rest-frame frequency at each time interval. Evidence for this effect is supported by the analysis of the average variability of other published quasar samples. The effect can account completely for the increase of variability with redshift found in other studies.

Di Clemente, A., Giallongo, E., Natali, G., Trevese, D., Vagnetti, F. (1996). The variability of quasars. II. Frequency dependence. THE ASTROPHYSICAL JOURNAL, 463(2 PART I), 466-472.

The variability of quasars. II. Frequency dependence

VAGNETTI, FAUSTO
1996-01-01

Abstract

The variability of 30 PG quasars has been observed in the red band during 3 years. A rest-frame structure function analysis shows an increase of variability with the time interval up to 0.2 mag rms after 2 years. A comparison with the IUE data available for PG quasars shows that the variability increases with the rest-frame frequency at each time interval. Evidence for this effect is supported by the analysis of the average variability of other published quasar samples. The effect can account completely for the increase of variability with redshift found in other studies.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/05 - Astronomia e Astrofisica
English
Con Impact Factor ISI
galaxies, photometry; quasars, general
http://arxiv.org/pdf/astro-ph/9512159.pdf
Di Clemente, A., Giallongo, E., Natali, G., Trevese, D., Vagnetti, F. (1996). The variability of quasars. II. Frequency dependence. THE ASTROPHYSICAL JOURNAL, 463(2 PART I), 466-472.
Di Clemente, A; Giallongo, E; Natali, G; Trevese, D; Vagnetti, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/44589
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