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On the SN 1993J Radio Shell Structure

  • J.M. Marcaide
  • I. Martí-Vidal
  • E. Ros
  • A. Alberdi
  • J.C. Guirado
  • L. Lara
  • M.A. Pérez-Torres
  • K.W. Weiler
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 99)

Summary

An accurate measurement of the expansion deceleration of SN 1993J depends on how well the shell size and its emission structure are known. With the goal of determining the emission structure of the shell, we have developed a new approach, which we call “Green Function Deconvolution” (GFD), based on iterative use of Green functions on the sky plane to reconstruct the radial emission profiles of spherically symmetric sources. This approach works reasonably well in the case of optically thin emitting sources, which is not the case for SN 1993J since, as we find, the emission from the central part of SN 1993J further away from us is strongly or totally absorbed. We describe the GFD method and present our findings about the emission structure of the shell. We also present the expansion of SN 1993J based on a method complementary to GFD, which will be described elsewhere.

Keywords

Outer Radius Central Absorption Brightness Distribution Shell Size Emission Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • J.M. Marcaide
    • 1
  • I. Martí-Vidal
    • 1
  • E. Ros
    • 2
  • A. Alberdi
    • 3
  • J.C. Guirado
    • 1
  • L. Lara
    • 3
    • 4
  • M.A. Pérez-Torres
    • 3
  • K.W. Weiler
    • 5
  1. 1.Departamento de AstronomíaUniversitat de ValènciaBurjassotSpain
  2. 2.Max-Planck-Institut für RadioastronomieBonnGermany
  3. 3.IAA-CSICGranadaSpain
  4. 4.Universidad de GranadaGranadaSpain
  5. 5.Naval Research LaboratoryWashington DCUSA

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