Thermal instability accretion disk model for the X-ray transient A0620-00

Details Thermal instability accretion disk model for the X-ray transient A0620-00 Thermal instability accretion disk model for the X-ray transient A0620-00

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...343..229h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 343, Aug. 1, 1989, p. 229-240. Research supported by the University of Texa

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Accretion Disks, Astronomical Models, Black Holes (Astronomy), Thermal Instability, X Ray Sources, Angular Momentum, Companion Stars, Computational Astrophysics, K Stars, Mass Transfer

Scientific paper

The limit-cycle thermal instability model for accretion disks is used to study the soft X-ray transient A0620-00. Thermal instability in geometrically thin, Keplerian alpha-model disks is reviewed. The observational constraints on A0620-00 are presented and the parameters chosen for the model are discussed. It is found that, with the adopted parameters, the model requires a central object mass of about 7 solar masses to fit the burst recurrence time. This is consistent with a black hole as the central object. The results suggest that a mass transfer instability may be responsible for outbursts.

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