1. Home
    2. Journals
    3. Journal of Astrophysics and Astronomy
    4. Volume 27
    5. Issue 2-3

    • Photospheric, chromospheric and helioseismic signatures of a large flare in super-active region NOAA 10486

      Ashok Ambastha

      Volume 27 Issue 2-3 June 2006 pp 255-265

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/027/02-03/0255-0265

    • Keywords

       

      Solar flares; flare trigger; ring diagram

    • Abstract

       

      NOAA 10486 produced several powerful flares, including the 4B/X17.2 superflare of October 28, 2003/11:10 UT. This flare was extensively covered by theHα and GONG instruments operated at the Udaipur Solar Observatory (USO). The central location of the active region on October 28,2003 was well-suited for the ring diagram analysis to obtain the 3-D power spectra and search for helioseismic response of this large flare on the amplitude, frequency and width of the p-modes. Further, using USO observations, we have identified the sites of new flux emergences, large proper motions and line-of-sight velocity flows in the active region and their relationship with the flare.

    • Author Affiliations

       

      Ashok Ambastha1

      1. Physical Research Laboratory, Udaipur Solar Observatory, Udaipur - 313 001, India

    • Dates

       
      Published
      9 June 2006

  • 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

© 2023-2024 Indian Academy of Sciences, Bengaluru.

Contact | Site index