• Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • 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

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.