Advection-dominated Outflows

Details Advection-dominated Outflows Advection-dominated Outflows

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...489l..29x&link_type=abstract

Astrophysical Journal Letters v.489, p.L29

Physics

20

Accretion, Accretion Disks, Black Hole Physics, Galaxies: Jets, Hydrodynamics, Ism: Jets And Outflows

Scientific paper

We obtained self-similar solutions for rotating advection-dominated (no radiative cooling) hydrodynamical bipolar outflows without the presence of a magnetic field. These solutions are two-dimensional and can have arbitrary power-law scaling with radius. The outflow is driven by the pressure, the centrifugal force, and the viscous diffusion, which also transports angular momentum outward. Depending on the density distribution as well as the radial velocity near the equatorial plane of the flow, two types of outflows are found: accretion outflow and ejection outflow. The viscosity parameter ( alpha ) affects the outflow in a complicated way, but, in general, high viscosity helps to generate bipolar outflow. Our solutions encompass previously studied cases.

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