Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267l..77b&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 267, April 15, 1983, p. L77-L81. Research supported
Astronomy and Astrophysics
Astrophysics
48
Gravitational Collapse, Milky Way Galaxy, Neutrinos, Stellar Evolution, Stellar Radiation, Radiation Detectors, Sensitivity
Scientific paper
Comparisons are made between the sensitivities of the one existing chlorine vat neutrino detector and gravity wave detectors for providing evidence of stellar collapse. The galactic star fraction within detection range is calculated as a controlling factor for the detectors. An expected collapse rate of 0.1 per year is projected by using a model of star distribution in the disk and standard values for Population I star lifetimes. A maximum detection radius of 1.5 kpc is obtained, as well as a detection rate of 0.0006/yr, two orders of magnitude less than the observational upper limit. For stars between 3-10 solar masses, the expected detection rate is 0.01/yr. The existing solar neutrino detector is concluded not to have registered a stellar collapse in the last 10 yr. Only 6 pecent of the stars in the galaxy can be monitored with present gravity wave detectors, and methods for increasing their effectiveness to 90 percent are indicated.
Bahcall John N.
Piran Tsvi
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