Constraints on the evolution of AM Herculis stars derived from the observed distribution of orbital periods

Details Constraints on the evolution of AM Herculis stars derived from the observed distribution of orbital periods Constraints on the evolution of AM Herculis stars derived from the observed distribution of orbital periods

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...259..159r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 259, no. 1, p. 159-166.

Astronomy and Astrophysics

Astrophysics

28

Binary Stars, Cataclysmic Variables, Stellar Evolution, Stellar Orbits, Novae, Star Distribution, Stellar Radiation

Scientific paper

We show that in the framework of the model of disrupted magnetic braking for explaining the period gap of cataclysmic variables (Hameury et al. 1988), the extremely small width of the period spike of Delta P = 2 min in the period distribution of AM Her stars places very tight constraints on the angular momentum loss rate in AM Her systems below the period gap and on the formation and evolution of AM Her systems above the gap. Furthermore, the dispersion of the secondary masses of the systems in the period spike must be delta M2 not greater than about 2 x 10 exp -3 solar mass.

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