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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/042/0046

    • Keywords

       

      Galaxies; active galactic nuclei; star formation.

    • Abstract

       

      We report the discovery of a bright, compact ultraviolet source at a projected separation of 1.1 kpc from the known active galactic nucleus (AGN) in Mrk 766 based on AstroSat/UVIT observations. We perform radial profile analysis and derive the UV flux almost free from the nearby contaminating sources. The new source is about 2.5 and 5.6 times fainter than the AGN in the far and near UV bands. The two sources appear as a pair of nuclei in Mrk 766. We investigate the nature of the new source based on the UV flux ratio, X-ray and optical emission. The new source is highly unlikely to be another accreting supermassive black hole in Mrk 766 as it lacks X-ray emission. We find that the UV/optical flux of the new source measured at four different bands closely follow the shape of the template spectrum of starburst galaxies. This strongly suggests that the new source is a compact star-forming region.

    • Author Affiliations

       

      P. P. DEKA1 G. C. DEWANGAN1 K. P. SINGH2 J. POSTMA3

      1. Inter-University Centre for Astronomy and Astrophysics (IUCAA), SPPU Campus, Pune 411 007, India.
      2. Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, Manauli P.O., SAS Nagar, Mohali 140 306, India.
      3. Department of Physics and Astronomy, University of Calgary, 2500 University Dr. NW, Calgary AB T2N 1N4, Canada.

    • Dates

       
      Published
      14 June 2021
      Manuscript received
      7 November 2020
      Accepted
      16 December 2020
      Final version published online
      14 June 2021

  • 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

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