Supercritical, steady-state, spherically symmetric accretion into a black hole

Details Supercritical, steady-state, spherically symmetric accretion into a black hole Supercritical, steady-state, spherically symmetric accretion into a black hole

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100..178f&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 1, July 1981, p. 178-182.

Astronomy and Astrophysics

Astronomy

4

Black Holes (Astronomy), Radiative Transfer, Steady State, Stellar Mass Accretion, H Ii Regions, Luminous Intensity

Scientific paper

The paper studies supercritical, spherically symmetric and time independent accretion into nonrotating black holes, which are embedded in a fully ionized H II region. It is shown that if one uses general relativistic equations to describe fluid and radiative transfer, there arises, besides the usual critical point due to the sound speed, a second one, which determines the luminosity produced by compression-work in the optically thick part of the flow. The number density of the hydrogen plasma far away from the black hole is assumed to be larger than n(infinity) equals 1,000,000/cu cm, and the temperature T(infinity) to be 10,000 K. Models for black hole masses M between 1 and 1000 solar masses and various accretion rates M are discussed. In all cases the resulting luminosities are very small compared to the Eddington luminosity.

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