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Record Details

Record 44 of 1939
Gamma-ray bursts and the birthrate of bare neutron stars
Author and Affiliation:
Ramaty, R.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Dar, A.(NASA Goddard Space Flight Center, Greenbelt, MD)
Nussinov, S.(Tel Aviv Univ., Israel)
Kozlovsky, B.(NASA Goddard Space Flight Center, Greenbelt, MD)
Abstract: Accretion of matter onto the surface of a white dwarf in a binary system can push it over the Chandrasekhar mass limit and may cause it to collapse into a neutron star without mass ejection or with the ejection of only a small mass. Such an optically quiet stellar collapse should be accompanied by a neutrino burst which could be detected with underground neutrino detectors if the collapse took place in our own Galaxy or in very close nearby galaxies. However, the frequency of such collapses is not known. Here we show that, if the ejected mass is less than 3 x 10 exp -4 solar mass, the electron-positron pairs resulting from neutrino-antineutrino annihilations outside the neutrinosphere produce a gamma-ray burst which could be observed out to distances of at least 300 Mpc, and that the observed rate of gamma-ray bursts sets stringent upper limits on the frequency of bare or nearlly bare neutron star births.
Publication Date: Jan 01, 1992
Document ID:
19930036218
(Acquired Dec 28, 1995)
Accession Number: 93A20215
Subject Category: ASTROPHYSICS
Document Type: Conference Proceedings
Publication Information: In: Gamma-ray bursts - Observations, analyses and theories (A93-20206 06-90); p. 62-66.; (SEE A93-20206)
Publisher Information: Cambridge University Press, Cambridge, United Kingdom and New York, United Kingdom
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GAMMA RAY BURSTS; GRAVITATIONAL COLLAPSE; NEUTRON STARS; STELLAR PHYSICS; ANNIHILATION REACTIONS; ELECTRON-POSITRON PAIRS; PAIR PRODUCTION; STELLAR MASS EJECTION
Imprint And Other Notes: In: Gamma-ray bursts - Observations, analyses and theories (A93-20206 06-90), p. 62-66.
Availability Source: Other Sources
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