SCO X-1 - A mini quasar?

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Binary Stars, Extragalactic Radio Sources, Hydrogen Clouds, Neutron Stars, Quasars, X Ray Sources, Mach Number, Radio Galaxies, Relativistic Electron Beams, Stellar Envelopes, Supernovae

Scientific paper

A model is proposed for the Galactic triple radio source and X-ray binary Sco X-1 that envisages its origin inside an H I cloud: the high-pressure ambient medium postulated for confining the bright radio lobes is due to the supernova explosion which occurred some 3×103 yr ago and which gave birth to the (now accreting) neutron star. The supernova shell has already faded away, similar to what is likely to happen to Tycho's shell whose expansion speed has decreased by a factor of 2.6 after no more than 400 yr. The feeding jets are relativistic.

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