Physics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.301..491v&link_type=abstract
Nature, vol. 301, Feb. 10, 1983, p. 491-493.
Physics
8
Binary Stars, Gamma Ray Bursts, Neutron Stars, Stellar Mass, Mass To Light Ratios, Red Dwarf Stars, Stellar Evolution, Stellar Luminosity, Stellar Radiation, X Ray Sources
Scientific paper
In the light of recent data imposing stringent new limitations on the mass and luminosity of gamma ray bursters, the possibility of obtaining such low luminosity systems as the evolutionary end products of galactic low-mass binary systems with a neutron star primary is investigated. The evolution of a binary system with a primary of 1.0 solar mass is analyzed by a simple argument in which X-ray heating of the dwarf star results in an increased rate of atmospheric escape through the L1 Lagrangian point. This again feeds the accretion on the neutron star, further increasing the X-ray luminosity and perhaps resulting in a runaway situation. From the final configuration it is concluded that, while the binary nature cannot be the prime cause of the bursting activity, it may be useful for two currently proposed gamma ray burst models involving galactic magnetic neutron stars. It is also shown that binaries can be viable candidates for the bursts despite the strong observational constraints.
Bonazzola Silvano
Hameury Jean-Marie
Heyvaerts Jean
Ventura Joana
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