Experimental upper limit to the galactic stellar-collapse rate

Details Experimental upper limit to the galactic stellar-collapse rate Experimental upper limit to the galactic stellar-collapse rate

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvl..62.2069d&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 62, May 1, 1989, p. 2069-2072. Research supported by DOE.

Physics

6

Gravitational Collapse, Milky Way Galaxy, Neutrinos, Stellar Cores, Cerenkov Counters, Cosmic Dust, Cosmic Gases, Electron Energy, Supernova 1987A

Scientific paper

A search is made for bursts of low-energy (20-60 MeV) neutrino interactions, signaling stellar core collapse, in a large underground water-Cerenkov detector. Over a period of 5.6 years (2.1 live years) no bursts were observed. A 90 percent confidence-level (CL) upper limit to the rate of stellar collapse in the galaxy is set at less than 1.5/yr. A limit of less than 1.1 stellar collapses per year (90 percent CL) is set for a smaller volume of the Galaxy (10 kpc radius) which includes the galactic center and more than 50 percent of the stars in the Milky Way.

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