Radiation hydrodynamics of axisymmetric accretion flow in a common envelope environment.

Details Radiation hydrodynamics of axisymmetric accretion flow in a common envelope environment. Radiation hydrodynamics of axisymmetric accretion flow in a common envelope environment.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297..739k&link_type=abstract

Astronomy and Astrophysics, v.297, p.739

Astronomy and Astrophysics

Astrophysics

8

Hydrodynamics, Accretion, Shock Waves, Stars: Novae

Scientific paper

We have carried out two-dimensional, axisymmetric calculations of the flow past a low-mass main-sequence star moving within the matter ejected by a white dwarf in a nova explosion. The calculations include a realistic envelope structure of the star, and the effects of radiative transport. Three cases, with and without radiation pressure, are studied. In the first case (where the radiation pressure is neglected), the flow is supersonic and a bow shock forms in front of the star. The heating of the stellar envelope by the ambient gas leads to an expansion of the envelope, producing a net mass loss from the star. In the second case (where radiation pressure is included), the flow becomes subsonic due to the additional pressure, so that no shock forms, and the net accretion rate is zero. An additional case, where the possibility of a lower ambient temperature is entertained, results in supersonic flow even with the radiation pressure included, and a bow shock forms ahead of the object. The consequences of our results for a common envelope phase in novae is discussed.

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