Thermally Driven Winds from Radiatively Inefficient Accretion Flows

Details Thermally Driven Winds from Radiatively Inefficient Accretion Flows Thermally Driven Winds from Radiatively Inefficient Accretion Flows

2009-06-19

arxiv.org/abs/0906.3761v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

15 pages, 5 figures, accepted by PASJ

Scientific paper

Radiatively inefficient accretion flows (RIAFs) are common feature of low-luminosity accretion flows, including quiescent states of X-ray binaries and low-lunimosity active galactic nuclei. Thermally driven winds are expected from such hot accretion flows. By assuming that the flow has self-similarity structure in the radial direction, we solve the vertical structure of the wind and accretion flows simultaneously and evaluate the mass loss rates by wind. We find that the ratio of the outflow rate to the accretion rate is approximately unity for a viscosity parameter, alpha lesssim 0.1, despite some uncertainties in the angular momentum and temperature distributions. That is, the accretion rate in the RIAFs is roughly proportional to the radius. Moreover, we elucidate the effect of cooling by wind on the underneath accretion flow, finding that this effect could be important for calculating energy spectrum of the RIAF. Observational implications are briefly discussed in the context of Sgr A*.

Affiliated with

Also associated with

No associations

Rating

Thermally Driven Winds from Radiatively Inefficient Accretion Flows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermally Driven Winds from Radiatively Inefficient Accretion Flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally Driven Winds from Radiatively Inefficient Accretion Flows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-13232