Spin up of the white dwarf in the intermediate polar AO Psc/H2252-035

Details Spin up of the white dwarf in the intermediate polar AO Psc/H2252-035 Spin up of the white dwarf in the intermediate polar AO Psc/H2252-035

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.236..151v&link_type=abstract

In ESA Recent Results on Cataclysmic Variables p 151-153 (SEE N86-20287 10-93)

Physics

Cataclysmic Variables, Spin, White Dwarf Stars, Light Curve, Magnetic Stars, Periodic Variations, Stellar Magnetic Fields, Stellar Mass Accretion, Stellar Spectrophotometry

Scientific paper

From photometric observations of AO Psc/H2252-035, made with the 90 cm telescope at ESO, times of maximum light for the orbital and the 2 pulsational light curve are derived. Combining these with previous values reveals that both pulse periods show a secular decrease. The spin-up rate of the white dwarf equals -6.6 +or- 1.1 10 to the minus 11th power 10-11, in good agreement with the prediction of Lamb and Patterson (1983) for an accreting magnetized white dwarf, rotating near its equilibrium period. However, the inferred low value of the white-dwarf magnetic field is in conflict with the conclusion of King, Frank and Ritter (1985), that there is no systematic difference between the white-dwarf magnetic fields in polars and intermediate polars.

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