Infrared peak in HZ Herculis prior to X-ray eclipse

Journal Article · Tue Apr 01 00:00:00 EST 1986 · Sov. Astron. Lett. (Engl. Transl.); (United States)

OSTI ID:6581113

Gnedin, IU N; Kirian, V V; Krat, A V; Pogodin, M A; Tarasov, A E

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. 16 references.

• Research Organization: Glavnaia Astronomicheskaia Observatoriia, Pulkovo, USSR; Krymskaya Astrofizicheskaia Observatoriia, Nauchny, Ukrainian SSR
• OSTI ID: 6581113
• Journal Information: Sov. Astron. Lett. (Engl. Transl.); (United States), Vol. 12
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
INFRARED SPECTRA
COSMIC X-RAY SOURCES
ECLIPSE
ENERGY SPECTRA
COSMIC RAY SOURCES
SPECTRA
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources