Supernova 1987A: the Ejecta Mass and the Explosion Energy

Details Supernova 1987A: the Ejecta Mass and the Explosion Energy Supernova 1987A: the Ejecta Mass and the Explosion Energy

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..937...25u&link_type=abstract

SUPERNOVA 1987A: 20 YEARS AFTER: Supernovae and Gamma-Ray Bursters. AIP Conference Proceedings, Volume 937, pp. 25-32 (2007).

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Astronomical Observations, Supernovae

Scientific paper

We studied a peculiar type IIP SN 1987A and compared it with a normal type IIP SN 1999em. We computed the hydrodynamic and time-dependent atmosphere models interpreting simultaneously both the photometric and spectroscopic observations. The bolometric light curve of SN 1987A and the spectral evolution of its Hα line are consistent with a presupernova radius of 35+/-5 Rsolar, an ejecta mass of 18.0+/-1.5 Msolar, an explosion energy of (1.50+/-0.12)×1051 erg, and a radioactive 56Ni mass of 0.0765 Msolar. We found that the hydrogen recombination in the atmospheres of the peculiar type IIP SN 1987A and the normal type IIP SN 1999em at the photospheric epoch, as well as most likely other type IIP supernovae, is essentially a time-dependent phenomenon. Nearly the same iron cores of the presupernovae and roughly the same explosion energies of SN 1987A and SN 1999em together imply a unique explosion mechanism for these core collapse supernovae.

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