An orbital period for the dwarf nova AH Herculis

Details An orbital period for the dwarf nova AH Herculis An orbital period for the dwarf nova AH Herculis

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..552m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, July 1984, p. 552-556. Research supported by the Sm

Astronomy and Astrophysics

Astronomy

4

Binary Stars, Cataclysmic Variables, Dwarf Novae, Orbit Calculation, Stellar Motions, Astronomical Photometry, Light Curve

Scientific paper

AH Her is the best-studied dwarf nova which displays rapid coherent oscillations at maximum light, yet its orbital period is not determined. Eleven nights of observations with the 1-meter Wise Observatory telescope with chopping secondary, and 'Nather' photometer, yield a period P = 0.247 + or - 0.008 day, in excellent agreement with that predicted from the decline rate of the outburst. The source of flickering in the system (presumably the hot spot) is shown to fluctuate with the same amplitude whether AH Her is in outburst or not. The implication is that the accretion stream, hot spot, and outer disk are unaffected by, and do not take part in the eruption.

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