Infrared light curves of AM Herculis

Details Infrared light curves of AM Herculis Infrared light curves of AM Herculis

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.271..334j&link_type=abstract

Nature, vol. 271, Jan. 26, 1978, p. 334, 335.

Astronomy and Astrophysics

Astronomy

12

Eclipsing Binary Stars, Infrared Astronomy, Light Curve, Stellar Radiation, Stellar Mass Accretion, White Dwarf Stars, X Rays

Scientific paper

AM Her has been identified as the optical counterpart of 3U 1809+50 by its common period of 3.1 h. The 2.2 micrometer light curve of AM Her was observed on the night of the 9-10 July, 1977, and the 1.2 micrometer curve was observed on the following night. The observations were made with a 1.5 m infrared flux collector. A standard infrared photometer with an InSb detector operated at 63 K was used. The obtained curves are presented in a graph. It is pointed out that the 1.2 micrometer light curve is very similar to the optical light curve and so could be explained by any model which describes the optical light curve. The model of Fabian et al. (1977) explains the primary minimum as the eclipse of the hot spot by the companion star. The second minimum is the eclipse of the white dwarf by this hot spot.

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