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Title: THE INFLUENCE OF SUPERNOVA REMNANTS ON THE INTERSTELLAR MEDIUM IN THE LARGE MAGELLANIC CLOUD SEEN AT 20-600 μm WAVELENGTHS

We present the analysis of supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) and their influence on the environment at far-infrared (FIR) and submillimeter wavelengths. We use new observations obtained with the Herschel Space Observatory and archival data obtained with the Spitzer Space Telescope, to make the first FIR atlas of these objects. The SNRs are not clearly discernible at FIR wavelengths; however, their influence becomes apparent in maps of dust mass and dust temperature, which we constructed by fitting a modified blackbody to the observed spectral energy distribution in each sightline. Most of the dust that is seen is pre-existing interstellar dust in which SNRs leave imprints. The temperature maps clearly reveal SNRs heating surrounding dust, while the mass maps indicate the removal of 3.7{sub −2.5}{sup +7.5} M {sub ☉} of dust per SNR. This agrees with the calculations by others that significant amounts of dust are sputtered by SNRs. Under the assumption that dust is sputtered and not merely pushed away, we estimate a dust destruction rate in the LMC of 0.037{sub −0.025}{sup +0.075} M {sub ☉} yr{sup –1} due to SNRs, yielding an average lifetime for interstellar dust of 2{sub −1.3}{sup +4.0}×10{sup 7} yr. We concludemore » that sputtering of dust by SNRs may be an important ingredient in models of galactic evolution, that supernovae may destroy more dust than they produce, and that they therefore may not be net producers of long lived dust in galaxies.« less
Authors:
;  [1] ; ; ; ;  [2] ;  [3] ;  [4] ;  [5] ; ; ;  [6] ;  [7] ; ; ; ;  [8] ;  [9] ;  [10] ;  [11] more »; « less
  1. Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG (United Kingdom)
  2. Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218 (United States)
  3. Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l'université, F-67000 Strasbourg (France)
  4. Department of Astronomy, 475 north Charter St., University of Wisconsin, Madison, WI 53706 (United States)
  5. Laboratory of Millimeter Astronomy, University of Maryland, College Park, MD 29742 (United States)
  6. Steward Observatory, University of Arizona, 933 North Cherry Ave., Tucson, AZ 85721 (United States)
  7. University of Western Sydney, Locked Bag 1797, Penrith South DC, NSW 1797 (Australia)
  8. CEA, Laboratoire AIM, Irfu/SAp, Orme des Merisiers, F-91191 Gif-sur-Yvette (France)
  9. Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22903 (United States)
  10. European Organization for Astronomical Research in the Southern Hemisphere (ESO), Karl-Schwarzschild-Straße 2, D-85748 Garching bei München (Germany)
  11. NASA Goddard Space Flight Center, Code 665, Greenbelt, MD 20771 (United States)
Publication Date:
OSTI Identifier:
22364443
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 799; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC DUST; ENERGY SPECTRA; FAR INFRARED RADIATION; GALACTIC EVOLUTION; INTERSTELLAR SPACE; LIFETIME; MAGELLANIC CLOUDS; MASS; SPACE; SUPERNOVA REMNANTS; SUPERNOVAE; TELESCOPES; WAVELENGTHS