Abstract
γ-Ray bursts have been attributed to binary systems1–3 with the burst resulting from an accretion instability1,2, or a thermonuclear explosion at the surface of an accreting magnetic neutron star4–6. Recent deep sky surveys in the X-ray7–9 and optical wavelengths (S. Illovaiski and C. Chevalier, personal communication), impose stringent new limitations on the theory. Assuming an average distance of ∼300 pc, these observations limit the optical absolute magnitude of bursters in quiescence to Mv>13 and their X-ray luminosity to <1031 erg s−1 for polar cap accretion (K. Hurley, S. Illovaiski and G. Pizzichini, personal communication). If these are local binary systems in our Galaxy, as suggested by their isotropic distribution in the sky10,11, the binary companion would clearly have to be a very low mass object. Although very peculiar, the presence of such an ‘invisible’ companion is possibly hinted at by the recently proposed identification of the 19 November 1978 γ-ray burst to a 1928 optical transient event lasting ⩽10 min discovered by Schaefer12. Motivated by these data, we examine here the possibility of obtaining such low luminosity systems as the evolutionary end products of galactic low-mass binary systems with a neutron star primary.
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Ventura, J., Bonazzola, S., Hameury, J. et al. Can γ-ray bursts originate from low-mass binaries?. Nature 301, 491–493 (1983). https://doi.org/10.1038/301491a0
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DOI: https://doi.org/10.1038/301491a0
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