• Spectral Variability of FSRQs

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      https://www.ias.ac.in/article/fulltext/joaa/032/01-02/0087-0090

    • Keywords

       

      Galaxies: active; galaxies: quasars: general; galaxies: photometry.

    • Abstract

       

      The optical variability of 29 flat spectrum radio quasars in SDSS Stripe 82 region are investigated by using DR7 released multi-epoch data. All FSRQs show variations with overall amplitude ranging from 0.24 mag to 3.46 mag in different sources. About half of FSRQs show a bluer-when-brighter trend, which is commonly observed for blazars. However, only one source shows a redder-when-brighter trend, which implies it is rare in FSRQs. In this source, the thermal emission may be responsible for the spectral behaviour.

    • Author Affiliations

       

      Minfeng Gu1 Y. L. Ai2 3

      1. Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China.
      2. National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan, P.O. Box 110, China.
      3. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China.
    • Dates

       
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