Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss..98..115u&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 98, no. 1, Jan. 1984, p. 115-147.
Astronomy and Astrophysics
Astrophysics
25
Astrophysics, Explosions, Stellar Evolution, Supermassive Stars, Supernovae, Astronomical Photography, Chemical Composition, Hydrogen Clouds, Light Curve, Magellanic Clouds
Scientific paper
An investigation of the outburst of the unique supernova SN 1961v in the galaxy NGC 1058 is carried out. An analysis of hydrodynamic models of supernova outbursts and a comparison with a considerable body of observational data on SN 1961v clearly show that the SN 1961v phenomenon is an explosion of a very massive star (VMS) of a mass of 2000 M_sun; and a radius of about 100 R_sun; which results in expelling the envelope with a kinetic energy of 1.8×1052erg. The light curve of SN 1961v furnishes direct evidence for the heterogeneity of the presupernova interior. Two astrophysical phenomena - the peculiar outburst of SN 1961v and the most luminous object R136a in the Large Magellanic Cloud (LMC) which reveals a striking similarity with the presupernova - are evidence for the existence of VMSs. The evolution of VMSs similar to the object R136a may be terminated by explosions like the outburst of SN 1961v.
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