检索结果-南通市图书馆

Numerical simulation of hot accretion flows with thermal conduction

Science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 168-172页

作者： wu maochun,yuan feng & bu defu key laboratory for research in galaxies and cosmology,{2. astronomical Observatory,chinese academy of sciences,shanghai 200030,china 1. key laboratory for {2. in galaxies and cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China

We report on the effects of isotropic thermal conduction in non-radiative collisionless accretion flows in two *** comparison to accretion flows without conduction,we find that the disk generally becomes cooler and ***,the magnitude of this effect depends on the kinetic viscosity *** it is proportional to density,the density profile of the accretion flow is flat,therefore the effect is not very ***,if it is proportional to r1/2.as is usual for the "α" disk description,the density profile is ***,the effect will be much more obvious,with the temperature profile of the accretion flow becoming much *** will have important observational consequences.

关键词： black hole accretion disk thermal conduction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On the effect of injection of gas in the numerical simulation of accretion flows

引用

Science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 139-142页

作者： bu defu,{2. feng,wu maochun & YANG XiaoHong key laboratory for research in galaxies and cosmology,shanghai astronomical Observatory,{12.,shanghai 200030,china 1. key laboratory for {2. in galaxies and cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China

We investigate the effects of various ways of injection of gas at the outer boundary in the numerical simulations of non-viscous accretion *** study three *** Model A,we inject material around the equatorial *** Models B and C,fullrange θ injection is used(we employ spherical coordinates).In all three models,the injected material has the same density distribution with polar angle θ.From the equatorial region to the polar regions,angular momentum of the injected material of Model B decreases faster than that in Model *** all of the models,after a transient episode of infall at the beginning of the simulations,the gas piles up in the equatorial regions outside the black hole and forms a thick torus bounded by a centrifugal *** find that the accretion rates of Models B and C are more than ten times higher than that in Model *** Model A,there is weak accretion only in the torus and outflows are found on the surface of the *** Model B,we find strong inflows on the surface of its torus,and the accretion in the torus is *** Model C,strong inflows also occur on the surface of its torus,but the accretion regions are narrower and there are strong outflows in its *** all of our models,the time-averaged density,pressure and angular momentum in the equatorial region can be described by a radial power law,with P ∝r-3/2.P ∝r-2.and l∝r0.

关键词： accretion accretion discs-black hole physics-hydrodynamics numerical

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：