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      https://www.ias.ac.in/article/fulltext/joaa/042/0059

    • Keywords

       

      Galaxies: structure; galaxies: evolution; galaxies: interaction.

    • Abstract

       

      Malin 1, being a class of giant low surface galaxies, continues to surprise us even today. The HST/F814W observation has shown that the central region of Malin 1 is more like a normal SB0/a galaxy, while the rest of the disk has the characteristic of a low surface brightness system. The AstroSat/UVITobservations suggest scattered recent star formation activity all over the disk, especially along the spiral arms. The central 900 ($\sim$14 kpc) region, similar to the size of the Milky Way’s stellar disk, has a number of far-UV clumps—indicating recent star-formation activity. The high resolution UVIT/F154W image revealsfar-UV emission within the bar region ($\sim$4 kpc)—suggesting the presence of hot, young stars in the bar. These young stars from the bar region are perhaps responsible for producing the strong emission lines such as Ha, [Oii] seen in the SDSS spectra. Malin 1B, a dwarf early-type galaxy, is interacting with the central region and probably responsible for inducing the recent star-formation activity in this galaxy.

    • Author Affiliations

       

      KANAK SAHA1 SURAJ DHIWAR2 3 SUDHANSHU BARWAY4 CHAITRA NARAYAN5 SHYAM TANDON1

      1. Inter-University Centre for Astronomy and Astrophysics, Pune 411 007, India.
      2. Department of Physics, Savitribai Phule Pune University, Pune 411 007, India.
      3. Dayanand Science College, Barshi Road, Latur 413 512, India.
      4. Indian Institute of Astrophysics (IIA), II Block, Koramangala, Bengaluru 560 034, India.
      5. National Centre for Radio Astrophysics-TIFR, Pune 411 007, India.
    • Dates

       
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