The accretion disk limit cycle mechanism in GK Persei

Details The accretion disk limit cycle mechanism in GK Persei The accretion disk limit cycle mechanism in GK Persei

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309l..43c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 309, Oct. 1, 1986, p. L43-L46.

Physics

29

Accretion Disks, Dwarf Novae, Magnetohydrodynamic Stability, Stellar Models, Black Body Radiation, Interstellar Extinction, Light Curve, Stellar Mass Accretion, Viscosity

Scientific paper

The accretion disk thermal instability (limit cycle) mechanism for dwarf novalike outbursts is applied to the old nova GK Per in order to find values of the input parameters which reproduce the observed outbursts and to constrain the physics associated with the disk and the mass transfer process. It is found that models in which the dimensionless viscosity parameter has the value of 0.003 in the cold phase and 0.015 in the hot phase reproduce the observed spacing and duration of the eruptions. The calculated light curves at V and 1750 A are close to those observed during recent eruptions of GK Per if the interstellar reddening E(B-V) to this system is roughly 0.3.

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