Abstract We report about a thin, energy accumulating α-disk which orbits a Kerr black hole. With increasing internal forces the thin, “standard” disks develop into energy accumulating disks. This “accumulating” disks are geometrically thin as long as its internal forces remain below a bound, allowing nearly geodesic orbits. Depending on the matter properties, the “accumulating” disk can differe essentially from the corresponding standard disk. In the innermost region, the “accumulating” disk can be rapidly cooled by means of bremsstrahlung - leading to a rapid energy release there. In disks, orbiting highly Kerr holes and possessing a hot disk radiation component (T≥ T(UV emision)), the temperature T drops down to recombination temperatures in the innermost region. In an “accumulating” disk, orbiting a low mass neutron star, runaway disk instabilities may appear for low accretion rates Ṁ0 and high star angular momentums a∗ only. “Accumulating” disks around supermassive black holes are stable against runaway instabilities for low angular momentums a∗ of the black hole only.
Rapid energy release of “accumulating” accretion disks in the time scale of the last stable orbit in the Kerr-field
Advances in Space Research ; 8 , 2-3 ; 175-178
1988-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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