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      https://www.ias.ac.in/article/fulltext/joaa/042/0031

    • Keywords

       

      Ultraviolet: galaxies; galaxies: elliptical and lenticular; cD; galaxies: spiral; galaxies: interaction; galaxies: evolution.

    • Abstract

       

      Dorado is a nearby (17.69 Mpc) strongly evolving galaxy group in the Southern Hemisphere. We are investigating the star formation in this group. This paper provides a FUV imaging of NGC 1533, IC 2038 and IC 2039, which form a substructure, south west of the Dorado group barycentre. FUV CaF2-1UVIT-Astrosat images enrich our knowledge of the system provided by GALEX. In conjunction with deep optical wide-field, narrow-band Ha and 21-cm radio images we search for signatures of the interaction mechanisms looking in the FUV morphologies and derive the star formation rate. The shape of the FUVluminosity profile suggests the presence of a disk in all three galaxies. FUV emission is detected out to the optical size for IC 2038, and in compact structures corresponding to Ha and H ii bright features in NGC 1533. A faint FUV emission, without an optical counterpart, reminiscent of the H i structure that surrounds the outskirts of NGC 1533 and extends up to IC 2038/2039, is revealed above the local background noise.

    • Author Affiliations

       

      R. RAMPAZZO1 2 P. MAZZEI2 A. MARINO2 L. BIANCHI3 S. CIROI4 E. V. HELD2 E. IODICE5 J. POSTMA6 E. RYAN-WEBER7 M. SPAVONE5 M. USLENGHI8

      1. INAF Osservatorio Astrofisico di Asiago, Via Osservatorio 8, 36012 Asiago, Italy.
      2. INAF Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padua, Italy.
      3. Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA.
      4. Department of Physics and Astronomy, University of Padova, Vicolo dell’Osservatorio 3, 35122 Padua, Italy.
      5. INAF-Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131 Naples, Italy.
      6. University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada.
      7. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
      8. INAF-IASF, Via A. Curti, 12, 20133 Milan, Italy.
    • Dates

       
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