Volume 503, Number 3, September I 2009
|Page(s)||869 - 872|
|Section||Interstellar and circumstellar matter|
|Published online||16 July 2009|
1.6 GHz VLBI observations of SN 1979C: almost-free expansion
Dpt. Astronomia i Astrofísica, Universitat de València, C/ Dr. Moliner 50, 46100 Burjassot, Spain e-mail: J.M.Marcaide@uv.es
2 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
3 Instituto de Astrofísica de Andalucía (CSIC), C/ Camino bajo de Huétor 50, 18008 Granada, Spain
4 Naval Research Laboratory, Washington D.C., USA
Accepted: 7 July 2009
We report on 1.6 GHz Very-Long-Baseline-Interferometry (VLBI) observations of supernova SN 1979C made on 18 November 2002. We derive a model-dependent supernova size. We also present a reanalysis of VLBI observations made by us on June 1999 and by other authors on February 2005. We conclude that, contrary to our earlier claim of strong deceleration in the expansion, SN 1979C has been undergoing almost-free expansion (; ) for over 25 years.
Key words: radio continuum: stars / supernovae: individual: SN 1979C
© ESO, 2009
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