摘要
We report on the effects of isotropic thermal conduction in non-radiative collisionless accretion flows in two dimensions.In comparison to accretion flows without conduction,we find that the disk generally becomes cooler and thinner.Specifically,the magnitude of this effect depends on the kinetic viscosity coefficient.If it is proportional to density,the density profile of the accretion flow is flat,therefore the effect is not very obvious.But,if it is proportional to r1/2,as is usual for the "α" disk description,the density profile is steeper.Therefore,the effect will be much more obvious,with the temperature profile of the accretion flow becoming much flatter.This will have important observational consequences.
We report on the effects of isotropic thermal conduction in non-radiative collisionless accretion flows in two dimensions.In comparison to accretion flows without conduction,we find that the disk generally becomes cooler and thinner.Specifically,the magnitude of this effect depends on the kinetic viscosity coefficient.If it is proportional to density,the density profile of the accretion flow is flat,therefore the effect is not very obvious.But,if it is proportional to r1/2,as is usual for the "α" disk description,the density profile is steeper.Therefore,the effect will be much more obvious,with the temperature profile of the accretion flow becoming much flatter.This will have important observational consequences.
基金
supported by the National Natural Science Foundation of China (Grants Nos. 10773024, 10833002, 10821302, and 10825314)
the Bairen Program of Chinese Academy of Sciences
the National Basic Research Program of China (Grant No. 2009CB824800)
