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  • Marcaide, J. M.Departamento de Astronomía, Universitat de València, Valencia, Spain & Harvard-Smithsonian Ctr. Astrophys., Cambridge, United States (author)

Discovery of shell-like radio-structure in SN1993J

  • Article/chapterEnglish1995

Publisher, publication year, extent ...

  • London :Nature Publishing Group,1995
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:hh-22863
  • https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-22863URI
  • https://doi.org/10.1038/373044a0DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • SUPERNOVA explosions are poorly understood, partly because of difficulties in modelling them theoretically(1), and partly because there have been no supernovae observed in our Galaxy since the invention of the telescope. But the recent discovery(2) of supernova SN1993J in the nearby galaxy M81 offers an opportunity to investigate the evolution of the remnant, and its interaction with the surrounding interstellar medium, at high resolution. Here we present radio observations of SN1993J, made using very-long-baseline interferometry, which show the development of a shell structure. This 8-month-old radio shell is the youngest ever discovered in a supernova. The data suggest that the supernova explosion and the expanding shell of the remnant have nearly spherical symmetry, with small deviations where some parts of the shell are brighter than others. If these deviations arise because of variations in the density of the shell, this may reconcile earlier reports of symmetric radio emission(3) with the observed optical asymmetry(4,5), as the density variations could easily cause the latter. We infer that the radio emission is generated at the interface(6-9), where the surrounding gas is shocked by the ejecta.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Alberdi, A.Inst. de Astrofis. de Andalucia, Spain (author)
  • Ros, E.Departamento de Astronomía, Universitat de València, Valencia, Spain (author)
  • Diamond, P.National Radio Astronomy Observatory, Socorro, United States (author)
  • Schmidt, B.Harvard-Smithsonian Ctr. Astrophys., Cambridge, United States (author)
  • Shapiro, I.I.Harvard-Smithsonian Ctr. Astrophys., Cambridge, United States (author)
  • Bååth, L.B.1948-Onsala Space Observatory, Onsala, Sweden(Swepub:hh)baath (author)
  • Davis, R. J.Nuffield Radio Astron. Laboratories, Macclesfield, Cheshire, United Kingdom (author)
  • Debruyn, A. G.Netherlands Found. Res. in Astron., Dwingeloo, Netherlands (author)
  • Elosegui, P.Harvard-Smithsonian Ctr. Astrophys., Cambridge, United States (author)
  • Guirado, J. C.Inst. de Astrofis. de Andalucia, CSIC, Granada, Spain (author)
  • Jones, D. L.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States (author)
  • Krichbaum, T. P.Max-Planck-Inst. F. Radioastronomie, Bonn, Germany (author)
  • Mantovani, F.Istituto di Radioastronomia, CNR, Bologna, Italy (author)
  • Preston, R. A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States (author)
  • Ratner, M. I.Harvard-Smithsonian Ctr. Astrophys., Cambridge, United States (author)
  • Rius, A.Inst. de Astronomia y Geodesia, Fac. de Ciencias Matemáticas, Madrid, Spain (author)
  • Rogers, A. E. E.MIT-Haystack Observatory, Westford, United States (author)
  • Schilizzi, R. T.Joint Institute for VLBI in Europe, Dwingaloo, Netherlands (author)
  • Trigilio, C.Istituto di Radioastronomia, CNR, Noto, Italy (author)
  • Whitney, A. R.MIT-Haystack Observatory, Westford, United States (author)
  • Witzel, A.Max-Planck-Inst. F. Radioastronomie, Bonn, Germany (author)
  • Zensus, A.National Radio Astronomy Observatory, Socorro, United States (author)
  • Departamento de Astronomía, Universitat de València, Valencia, Spain & Harvard-Smithsonian Ctr. Astrophys., Cambridge, United StatesInst. de Astrofis. de Andalucia, Spain (creator_code:org_t)

Related titles

  • In:NatureLondon : Nature Publishing Group373:6509, s. 44-450028-08361476-4687

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