Computer Science – Numerical Analysis
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....66..269l&link_type=abstract
Astronomy and Astrophysics, vol. 66, no. 1-2, May 1978, p. 269-274.
Computer Science
Numerical Analysis
2
Astronomical Models, Binary Stars, Black Holes (Astronomy), Globular Clusters, Stellar Evolution, X Ray Sources, Angular Momentum, Gravitational Waves, Mass Transfer, Numerical Analysis, Stellar Gravitation, White Dwarf Stars
Scientific paper
A model for globular-cluster X-ray sources is considered which consists of a binary system containing a 100-solar-mass black-hole component that accretes matter by Roche-lobe overflow from an evolving 1-solar-mass main-sequence companion, with the mass transfer driven by gravitational radiation. The choice of initial parameters for the binary system is discussed. Evolutionary computations are performed which show that X-rays with a maximum luminosity of 10 to the 37th power erg/s are produced for several hundred million years and that a phase of several billion years with an X-ray luminosity of approximately 10 to the 35th power erg/s then ensues. The results are compared with those obtained under the assumption of vanishing gravitational-radiation losses, and the evolution of the system is found to be very different in this case. The relevance of the model to gamma-ray bursts is briefly discussed.
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