Strongly decelerated expansion of SN1979C
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Strongly decelerated expansion of SN1979C

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Strongly decelerated expansion of SN1979C

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dc.contributor.author Marcaide Osoro, Juan María
dc.contributor.author Pérez Torres, Miguel Ángel
dc.contributor.author Ros Ibarra, Eduardo
dc.contributor.author Alberdi, A.
dc.contributor.author Diamond, P. J.
dc.contributor.author Guirado Puerta, Jose Carlos
dc.contributor.author Lara, L.
dc.contributor.author Van Dyk, S. D.
dc.contributor.author Weiler, K.W.
dc.date.accessioned 2010-06-18T08:00:36Z
dc.date.available 2010-06-18T08:00:36Z
dc.date.issued 2002
dc.identifier.uri http://hdl.handle.net/10550/12983
dc.description.abstract We observed SN1979C in M100 on 4 June 1999, about twenty years after explosion, with a very sensitive four-antenna VLBI array at the wavelength of λ 18 cm. The distance to M100 and the expansion velocities are such that the supernova cannot be fully resolved by our Earth-wide array. Model-dependent sizes for the source have been determined and compared with previous results. We conclude that the supernova shock was initially in free expansion for 6+- 2 yrs and then experienced a very strong deceleration. The onset of deceleration took place a few years before the abrupt trend change in the integrated radio flux density curves. We estimate the shocked swept-up mass to be Msw ~1.6 Mo, assuming a standard density profile for the CSM. Such a swept-up mass for SN1979C suggests a mass of the hydrogen-rich envelope ejected at explosion no larger than Menv ~ 0.9 Mo. If SN1979C originated in a binary star, the low value of Menv suggests that the companion of the progenitor star stripped o most of the hydrogen-rich envelope mass of the presupernova star prior to the explosion. en
dc.language.iso en en
dc.relation http://www.aanda.org/articles/aa/pdf/2002/11/aah3030.pdf en
dc.source Marcaide Osoro, Juan María ; Pérez Torres, Miguel Ángel ; Ros, E. ; Alberdi, A. ; Diamond, P. J. ; Guirado Puerta, Jose Carlos ; Lara, L. ; Van Dyk, S.D. ; Weiler, K.W., 2002, Strongly decelerated expansion of SN1979C, Astronomy and Astrophysics, vol. 384, no. 2, p. 408-413 en
dc.subject Interferometric ; Supernovae ; SN1979C ; ISM ; Supernova remnants ; Radio continuum ; Stars ; M100 ; Galaxies en
dc.title Strongly decelerated expansion of SN1979C en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20011794 en
dc.description.private Marcaide Osoro, Juan Maria, J.M.Marcaide@uv.es ; Perez Torres, Miguel Angel, M.Angel.Perez@uv.es ; Guirado Puerta, Jose Carlos, Jose.C.Guirado@uv.es en
dc.identifier.idgrec 053997 en

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