NEUTRINO EMISSION FROM HIGH-ENERGY COMPONENT GAMMA-RAY BURSTS
- Fakultaet f. Physik and Astronomie, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany)
Gamma-ray bursts (GRBs) have the potential to produce the particle energies (up to 10{sup 21} eV) and energy budget (10{sup 44} erg yr{sup -1} Mpc{sup -3}) to accommodate the spectrum of the highest energy cosmic rays; on the other hand, there is no observational evidence that they accelerate hadrons. The Fermi Gamma-ray Space Telescope recently observed two bursts that exhibit a power-law high-energy extension of a typical (Band) photon spectrum that extends to {approx}30 GeV. On the basis of fireball phenomenology we argue that these two bursts, along with GRB941017 observed by EGRET in 1994, show indirect evidence for considerable baryon loading. Since the detection of neutrinos is the only unambiguous way to establish that GRBs accelerate protons, we use two methods to estimate the neutrino flux produced when they interact with fireball photons to produce charged pions and neutrinos. While the number of events expected from the two Fermi bursts discussed is small, should GRBs be the sources of the observed cosmic rays, a GRB941017-like event that has a hadronic power-law tail extending to several tens of GeV will be detected by the IceCube neutrino telescope.
- OSTI ID:
- 21464745
- Journal Information:
- Astrophysical Journal, Vol. 721, Issue 2; Other Information: DOI: 10.1088/0004-637X/721/2/1891; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMIC GAMMA BURSTS
ENERGY BALANCE
GAMMA RADIATION
GEV RANGE 10-100
NEUTRINOS
PHOTON EMISSION
PHOTONS
PIONS
PROTONS
TELESCOPES
BARYONS
BOSONS
COSMIC RADIATION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EMISSION
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MESONS
NUCLEONS
PRIMARY COSMIC RADIATION
PSEUDOSCALAR MESONS
RADIATIONS