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Behavior of Matter Near the Outer Region of the Accretion Disk in Her X-1

Published online by Cambridge University Press:  07 August 2017

Nikolai G. Bochkarev  and
Eugenia A. Karitskaya
Nikolai G. Bochkarev
Affiliation:
Sternberg Astronomical Inst., Moscow 119899, USSR
Eugenia A. Karitskaya
Affiliation:
Inst. for Astronomy, USSR Acad. Sci., Moscow 109017, USSR

Abstract

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Detailed analysis of numerous observational data for Her X-1 / HZ Her shows that Her X-1 has a rare type of accretion regime: impulses of mass transfer every 0.81 d. Semi-empirical analysis show complicated 3 D type of gas flow near the outer disk rim of Her X-1: interaction of gas stream with disk forms blobs, which are disintegrated into small drops of matter (“sprays”) by an interaction with gaseous corona around the outer disk rim. Fall of the sprays on different parts of the disk decreases time of accreting mass flow along disk radius. Evaporation of sprays is a source of mass supporting the disk corona. The corona and disintegrated blobs (sprays) have numerous observational manifestations in optical and X-ray ranges. Evaporation of the corona from the Roche lobe could be an important source of orbital angular momentum loss and, consequently, a source of orbital period variation.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 449 - 452
Copyright
Copyright © Kluwer 1992 

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