A look at Supernova 1987A

Details A look at Supernova 1987A A look at Supernova 1987A

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987lpih.sympq....s&link_type=abstract

Presented at the International Symposium on Lepton and Photon Interactions at High Energies, Hamburg, Fed. Republic of Germany,

Computer Science

Neutrinos, Radioactive Decay, Supernova 1987A, Angular Distribution, Detection, Stellar Mass

Scientific paper

Supernova 1987A is reviewed with emphasis on the neutrino observations. It is shown that the results fit well with the expectations for neutrino temperatures (T approx. 4 epsilonO and 4.5 MeV) and total energy emitted (2 epsilonO and 4 times 10 to the 53rd power ergs). It is argued that the detection tends to favor collapse models that yield emission for 10 second timescales with a 1 epsilonO 2 second early accretion phase followed by Kelvin-Helmholtz cooling as opposed to prompt shocks with the immediate onset of cooling. It is also argued that the probable detection of one or more electron scattering event favors a superthermal tail at high energies. Neutrino mass limits and flavor limits are comparable to laboratory experiments. An estimate for future collapse rates in our galaxy of 1/7 year is made based on nucleosynthesis yields. The supernova also has eliminated many axion and majoron models.

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