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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/034/04/0317-0327

    • Keywords

       

      Quasars: general; quasars: absorption lines; methods: statistical.

    • Abstract

       

      The measurement of the variations of absorption lines over time is a good method to study the physical conditions of absorbers. In this paper, we measure the variations of the line strength of 36 narrow Mg II𝜆𝜆2796, 2803 associated absorption doublets, which are imprinted on 31 quasar spectra with two observations of the Sloan Digital Sky Survey (SDSS). The timescales of these quasar span 1.1–5.5 years at the quasar rest-frame. On these timescales, we find that these narrow Mg II associated absorption doublets are stable, with no one 𝜆2796 line showing strength variation beyond 2 times error (2𝜎).

    • Author Affiliations

       

      Zhi-Fu Chen1 2 Cai-Juan Pan1 Guo-Qiang Li2 Wei-Rong Huang2 Mu-Sheng Li2

      1. Department of Physics and Telecommunication Engineering of Baise University, Baise 533000, China.
      2. Center for Astrophysics of Guangzhou University, Guangzhou 510006, China.
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

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