Spatially-resolved dust properties of the GRB 980425 host galaxy

Publication: Research - peer-reviewJournal article – Annual report year: 2014

  • Author: Michałowski, Michał J.

    Ghent University, Belgium

  • Author: Hunt, L. K.

    National Institute for Astrophysics, Italy

  • Author: Palazzi, E.

    National Institute for Astrophysics, Italy

  • Author: Savaglio, S.

    Max Planck Institute, Germany

  • Author: Gentile, G.

    Vrije Universiteit Brussel, Belgium

  • Author: Rasmussen, Jesper

    Plasma Physics and Fusion Energy, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kgs. Lyngby, Denmark

  • Author: Baes, M.

    Ghent University, Belgium

  • Author: Basa, S.

    Aix Marseille Universite, France

  • Author: Bianchi, S.

    National Institute for Astrophysics, Italy

  • Author: Berta, S.

    Max Planck Institute, Germany

  • Author: Burlon, D.

    University of Sydney, Australia

  • Author: Ceron, J. M. Castro

    European Space Astronomy Centre and European Space Agency, Spain

  • Author: Covino, S.

    National Institute for Astrophysics, Italy

  • Author: Cuby, J. -G.

    Aix Marseille Universite, France

  • Author: D'Elia, V.

    ASI Science Data Center , Italy

  • Author: Ferrero, P.

    Universidad de La Laguna, Spain

  • Author: Götz, D.

    University Paris Diderot - Paris 7, France

  • Author: Hjorth, J.

    University of Copenhagen, Denmark

  • Author: Koprowski, M. P.

    University of Edinburgh, United Kingdom

  • Author: Borgne, D. Le

    Pierre and Marie Curie University - University of Paris VI, France

  • Author: Floc'h, E. Le

    University Paris Diderot - Paris 7, France

  • Author: Malesani, D.

    University of Copenhagen, Denmark

  • Author: Murphy, T.

    University of Sydney, Australia

  • Author: Pian, E.

    National Institute for Astrophysics, Italy

  • Author: Piranomonte, S.

    National Institute for Astrophysics, Italy

  • Author: Rossi, A.

    Thüringer Landessternwarte Tautenburg, Germany

  • Author: Sollerman, J.

    Stockholm University, Sweden

  • Author: Tanvir, N. R.

    University of Leicester, United Kingdom

  • Author: Postigo, A. de Ugarte

    Instituto de Astrofísica de Andalucía, Spain

  • Author: Watson, D.

    University of Copenhagen, Denmark

  • Author: van der Werf, P.

    Leiden University, Netherlands

  • Author: Vergani, S. D.

    National Institute for Astrophysics, Italy

  • Author: Xu, D.

    University of Copenhagen, Denmark

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Gamma-ray bursts (GRBs) have been proposed as a tool to study star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxy of the closest known GRB 980425 at z=0.0085 using our new high-resolution observations from Herschel, APEX, ALMA and ATCA. We modeled the spectral energy distributions of the host and of the star-forming region displaying the Wolf-Rayet signatures in the spectrum (WR region), located 800 pc away from the GRB position. The host is characterised by low dust content and high fraction of UV-visible star-formation, similar to other dwarf galaxies. Such galaxies are abundant in the local universe, so it is not surprising to find a GRB in one of them, assuming the correspondence between the GRB rate and star-formation. The WR region contributes substantially to the host emission at the far-infrared, millimeter and radio wavelengths and we propose this to be a consequence of its high gas density. If dense environments are also found close to the positions of other GRBs, then the ISM density should also be considered as an important factor influencing whether a given stellar population can produce a GRB, in a similar way as metallicity.
Original languageEnglish
JournalAstronomy & Astrophysics
Volume562
Issue numberA70
Number of pages13
ISSN0004-6361
DOIs
StatePublished - 2014

Bibliographical note

© ESO 2014

CitationsWeb of Science® Times Cited: 19
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