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Gamma-ray bursts and the birthrate of bare neutron starsAccretion 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.
Document ID
19930036218
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Ramaty, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Dar, A.
(NASA Goddard Space Flight Center Greenbelt, MD; Technion - Israel Inst. of Technology, Haifa, United States)
Nussinov, S.
(Tel Aviv Univ. Israel)
Kozlovsky, B.
(NASA Goddard Space Flight Center Greenbelt, MD; Tel Aviv Univ., Israel)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Gamma-ray bursts - Observations, analyses and theories (A93-20206 06-90)
Publisher: Cambridge University Press
Subject Category
Astrophysics
Accession Number
93A20215
Distribution Limits
Public
Copyright
Other

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