Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350l..33b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. L33-L35.
Astronomy and Astrophysics
Astrophysics
26
Kinetic Energy, Radiative Transfer, Stellar Envelopes, Stellar Mass, Supernova 1987A, Equations Of State, Shock Waves, Stellar Mass Ejection, Stellar Structure
Scientific paper
A relation between mass and kinetic energy for the hydrogen envelope of SN 1987A is derived, using direct observations of the luminosities and photospheric velocities of the supernova. With a schematic but realistic treatment of the radiative transfer problem it is found that the observations determine uniquely the kinetic energy of the envelope once its mass is known. No input from the existing computer calculations of supernova explosions is used therefore, the results are independent from any model assumed for the explosion mechanism and can actually constrain such models. Although the mass of the envelope has not so far been determined from observations, from different studies of the progenitor star there seems to be evidence for a quite large value, in the range M(env) greater than 7 solar masses. Corresponding to this, the approach gives for SN 1987A a kinetic energy of the ejecta of 1 foe or more, the energy scaling roughly linearly with M(env).
Bethe Hans A.
Pizzochero Pierre
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