An infrared peak in HZ Herculis prior to X-ray eclipse

Details An infrared peak in HZ Herculis prior to X-ray eclipse An infrared peak in HZ Herculis prior to X-ray eclipse

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..300g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, Apr. 1986, p. 300-303) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, Mar.-Apr

Astronomy and Astrophysics

Astronomy

Eclipsing Binary Stars, Infrared Spectra, Spectral Energy Distribution, X Ray Binaries, Infrared Photometry, Orbital Elements

Scientific paper

In the summer and autumn of 1984, HZ Her (one of the stars in the Hercules X-1 binary system) was observed in the IR (J, H, and K bands) with the 125-cm AZT-11 telescope of the Crimean Astrophysical Observatory. The observations of the star disclosed a sharp IR peak at orbital phase phi = 0.91, shortly before an X-ray eclipse, reaching a power greater than about 10 to the 36th erg/s. Although several hypotheses are suggested to provide an interpretation of this phenomenon, none of the proposed mechanisms can fully explain the peculiarities in the object's light curves close to eclipse.

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