Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-25T18:27:05.423Z Has data issue: false hasContentIssue false
  • English
  • Français

The optical variability of radio-loud quasars

Published online by Cambridge University Press:  21 February 2013

Minfeng Gu  and
Y. L. Ai
Minfeng Gu
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, 200030 Shanghai, PR China email: [email protected]
Y. L. Ai
Affiliation:
National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, Yunnan, PR China
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The optical variability of a sample of 44 FSRQs and 18 SSRQs in the SDSS stripe 82 region is investigated by using the multi-epoch data covering nine years. The variabilities are clearly detected in each source with the amplitude in r band, from 0.18 to 3.46 mag. Twenty-five of 44 FSRQs show a bluer-when-brighter trend (BWB), while only one FSRQ shows a redder-when-brighter trend, which is in contrast to our previous results. Eight of 18 SSRQs display a BWB. We found an anti-correlation between the Eddington ratio and the variability amplitude in r band for SSRQs, which is similar to that in radio-quiet AGNs. This implies that the thermal emission from the accretion disk may be responsible for the variability in SSRQs.

Keywords

Galaxies: activequasars: generalgalaxies: photometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 217 - 218
Copyright
Copyright © International Astronomical Union 2013

References

Gu, M. F., Lee, C. U., Pak, S., Yim, H. S., & Fletcher, A. B. 2006, A&A, 450, 39Google Scholar
Gu, M. F. & Ai, Y. L. 2011a, A&A, 528, A95Google Scholar
Gu, M. F. & Ai, Y. L. 2011b, A&A, 534, A59Google Scholar
Rani, B., Gupta, A. C., Strigachev, A., et al. 2010, MNRAS, 404, 1992Google Scholar