Spherical accretion onto a neutron star is analyzed, taking into account the effect of radiation pressure on the gas flow but neglecting the pressure of the infalling gas. The radiative-transfer equations are derived to first order in v/c, and the system is solved numerically with an approximate treatment of the opacity variation. Numerical results are given for a neutron star having a radius of 1 million cm and a mass of 1 solar mass. These results imply that the radiation flux in the comoving frame is greater than the Eddington limit and indicate that there are no transitions from supersonic to subsonic flow. Results are also discussed for a black hole of arbitrary mass.
The effect of radiation pressure on spherical accretion / Maraschi, L; Reina, C.; Treves, A.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 66:1-2(1978), pp. 99-101.
The effect of radiation pressure on spherical accretion
Reina, C.;Treves, A.
1978-01-01
Abstract
Spherical accretion onto a neutron star is analyzed, taking into account the effect of radiation pressure on the gas flow but neglecting the pressure of the infalling gas. The radiative-transfer equations are derived to first order in v/c, and the system is solved numerically with an approximate treatment of the opacity variation. Numerical results are given for a neutron star having a radius of 1 million cm and a mass of 1 solar mass. These results imply that the radiation flux in the comoving frame is greater than the Eddington limit and indicate that there are no transitions from supersonic to subsonic flow. Results are also discussed for a black hole of arbitrary mass.| File | Dimensione | Formato | |
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