Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....81l...7v&link_type=abstract
Astronomy and Astrophysics, vol. 81, no. 3, Jan. 1980, p. L7-L10.
Astronomy and Astrophysics
Astrophysics
69
Binary Stars, Early Stars, Neutron Stars, Stellar Models, Angular Momentum, Eddington Approximation, Mass Transfer, Stellar Evolution, Stellar Mass Ejection, Stellar Rotation, Supernova Remnants, X Ray Spectra
Scientific paper
A model is presented in which SS 433 is a binary system consisting of an evolved early-type star and an old neutron star with a rate of mass transfer of 0.00001 to 0.0001 solar masses/yr (the system being simply a later stage of evolution of a normal massive X-ray binary). The transferred matter flows to the compact star through a disk but the Eddington limit prevents the bulk of it from being accreted, causing mass ejection from the inner part of the disk in the form of two opposed jets. The orbit of the system should be shrinking on a timescale of approximately 10,000 yrs and the orbital period is expected to be in the range of 5 to 20 days; non-alignment of the rotational and orbital angular momentum vectors causes the disk to precess with a 164-day period. This non-alignment is easily explained if the orbital period before spiraling-in was greater than or equal to 9 days.
Ostriker Jeremiah P.
Petterson Jacobus A.
van den Heuvel Edward Peter Jacobus
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