Instability in a braking disk: Herculis X-1 in the inactive state

Details Instability in a braking disk: Herculis X-1 in the inactive state Instability in a braking disk: Herculis X-1 in the inactive state

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287..559m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 2, p. 559-563

Astronomy and Astrophysics

Astrophysics

5

Accretion Disks, Binary Stars, Braking, Mass Flow, Stability, Mass Distribution, Neutron Stars, Stellar Activity, Stellar Luminosity, Stellar Mass Accretion, Stellar Mass Ejection, Stellar Models

Scientific paper

We study the properties of the accretion disk in the binary system HZ Her/Her X-1 during an 'inactive' phase. Such phases without accretion onto the neutron star are known from historical plate collections. We show that a disk instability, comparable to the one causing the dwarf nova outbursts will probably lead to cyclic light variations. But the higher luminosity of the secondary star makes them hardly detectable.

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