On the clock mechanism and the implausibility of the 35 day precessing disk in HZ Herculis/Hercules X-1

Details On the clock mechanism and the implausibility of the 35 day precessing disk in HZ Herculis/Hercules X-1 On the clock mechanism and the implausibility of the 35 day precessing disk in HZ Herculis/Hercules X-1

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..716k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 15, 1983, p. 716-721.

Astronomy and Astrophysics

Astrophysics

19

Accretion Disks, Binary Stars, Stellar Mass Accretion, X Ray Sources, A Stars, Mass Ratios, Stellar Models

Scientific paper

The concept of the precessing accretion disk in HZ Her/Her X-1 in its varied forms, to account for the 35 day periodicity in the X-ray flux, has met many objections from a number of workers on various grounds, but it is still being invoked in current publications. These objections are reviewed and additional arguments are presented against the precessing accretion disk model. The implausibility of the disk models is demonstrated. An alternate clock mechanism, based on nonlinear oscillations in the normal star, which provides the modulation of the mass flow is discussed.

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