HUGE EJECTION OF ANTIELECTRON NEUTRINOS FROM MASSIVE ACCRETION DISKS

Journal Article · Thu May 20 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/715/1/86· OSTI ID:21448770

Yokosawa, M; Uematsu, S; Abe, J ^[1]

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1. Department of Physics, Faculty of Natural Science, Ibaraki University, Mito Bunkyo 2-1-1, Post Num. 310-8512 (Japan)

The standard massive accretion disk with Keplerian angular momentum (standard accretion disk) producing gamma-ray bursts (GRBs) is investigated on the bases of the microphysics of neutrinos and general relativity. Since the accretion disk gradually heated by viscosity is efficiently cooled by antielectron neutrinos, the accreting flow maintains a relatively low temperature, T {approx} 3 x 10{sup 10} K, over a long range of accreting radius that produces very high dense matter around a rotating black hole, {rho} {>=} 10{sup 13} g cm{sup -3}. Thus, the massively accreting matter is in the domain of heavy nuclei all over the accreting flow onto a central black hole where the fraction of evaporated free neutrons is large, Y{sub n} {approx} 0.8, and that of protons is infinitesimal, Y{sub p} {approx} 10{sup -4}. The electron neutrinos in the disk are almost absorbed by rich neutrons while the antielectron neutrinos are little absorbed by rarefied protons. The mean energy of antielectron neutrinos ejected from the disk is extraordinarily high, because the antielectron neutrinos are degenerated in the high dense disk. The huge antielectron neutrinos with high mean energy and large luminosity, are ejected from the massive accretion disk. The antielectron neutrinos are possibly the sources of the relativistic jets producing GRBs.

• OSTI ID: 21448770
• Journal Information: Astrophysical Journal, Vol. 715, Issue 1; Other Information: DOI: 10.1088/0004-637X/715/1/86; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCRETION DISKS
BLACK HOLES
COSMIC GAMMA BURSTS
ELECTRON NEUTRINOS
GENERAL RELATIVITY THEORY
LUMINOSITY
MATTER
PROTONS
BARYONS
COSMIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
NEUTRINOS
NUCLEONS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PRIMARY COSMIC RADIATION
RADIATIONS
RELATIVITY THEORY