Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.317..599d&link_type=abstract
Nature (ISSN 0028-0836), vol. 317, Oct. 17, 1985, p. 599-601.
Astronomy and Astrophysics
Astronomy
4
Binary Stars, Neutron Stars, Nonthermal Radiation, Radio Sources (Astronomy), Stellar Models, X Ray Sources, Angular Momentum, Galactic Bulge, Interstellar Matter, Stellar Winds
Scientific paper
The extended non-thermal radio sources G 357.7-0.1 and G 5.3-1.0 in the galactic bulge have about the same energy content in the form of relativistic particles and magnetic fields as the brightest ordinary supernova remnants, but differ from the latter in having a marked axial symmetry. Helfand and Becker have argued that these structural properties can be explained most plausibly if these "remnants" were produced by the ejection of matter with high kinetic energy by accreting binary systems. The authors show that the only type of neutron star binary that can fulfil both the condition of longevity and of a continuous high-mass transfer rate is a relatively wide binary in which the companion of the neutron star is a low-mass giant, with an orbital period of the order of weeks to months.
de Kool Martijn
van den Heuvel Edward Peter Jacobus
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