Evolutionary period changes in rotating hot pre-white dwarf stars

Details Evolutionary period changes in rotating hot pre-white dwarf stars Evolutionary period changes in rotating hot pre-white dwarf stars

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...298..752k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 298, Nov. 15, 1985, p. 752-755. Research sponsored by McDonald Observatory.

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13

Computational Astrophysics, Pulsars, Stellar Evolution, Stellar Rotation, White Dwarf Stars, Angular Velocity, Periodic Variations, Stellar Models

Scientific paper

The splitting of high order nonradial g-modes due to slow rotation in models of hot prewhite dwarf stars of 0.60 solar mass are calculated. The effects of rotational spin-up, produced by gravitational contraction, on the rate of evolutionary period change for the cases of uniform and differential rotation are investigated. For models in the luminosity range of PG 1159 - 035 (L of about 100 solar luminosities), it is found that rotation rates of a few thousand seconds for modes with m less than about -2 produce values of d(ln P)/dt that are consistent with the measurement of the rate of period change of the 516-second period of PG 1159 - 035.

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