卢炬甫
天体物理理论
个性化签名
 姓名：卢炬甫
 目前身份：
 担任导师情况：
 学位：

学术头衔：
博士生导师
 职称：

学科领域：
天体物理学
 研究兴趣：天体物理理论
厦门大学教授、博士生导师，1970年毕业于中国科技大学，1985年在意大利International School for Advanced Studies获博士学位，从事天体物理理论研究，作为第一完成人的项目“黑洞吸积与喷流的动力学研究”获2002年度教育部提名国家科学技术奖自然科学一等奖。

主页访问
3585

关注数
0

成果阅读
152

成果数
10
【期刊论文】Global dynamics of radiatively inefficient accretion flows: advection versus convection
卢炬甫 ， JuFu Lu， ShuangLiang Li and WeiMin Gu
Mon. Not. R. Astron. Soc. 352, 147152 (2004)，0001，（）：
1年11月30日
We obtain global solutions for radiatively inefficiently accretion flows around black holes. Whether and where convection develops in a flow are selfconsistently determined by mixinglength theory. The solutions can be divided into three types according to the strength of normal viscosity. Type I solutions correspond to large viscosity parameter α 0.1they are purely advectiondominated with no convection; they have been extensively studied in the literature. Type II solutions are for moderate α 0.01, and have a threezone structure. The inner zone is advectiondominated, the middle zone is convectiondominated and ranges from a few tens to a few thousands of gravitational radii, and the outer zone is convectively stable and outwardly matches a Keplerian disc. The net energy flux throughout the flow is inward, as in type I solutions. Type III solutions, which are for small α 0.001, consist of two zones as Abramowicz et al. suggested previously: an inner advectiondominated zone and an outer convectiondominated zone, separated at a radius of a few tens of gravitational radii. This type of solution has an outward net energy flux. In both type II and type III solutions, the radial density profile is between the 1/2 law of the selfsimilar convectiondominated accretion flow model and the 3/2 law of the selfsimilar advectiondominated accretion flow model, and the efficiency of energy release is found to be extremely low. Our results are in good agreement with those of recent numerical simulations.
accretion,， accretion discsblack hole physicsconvectionhydrodynamics.，

14浏览

0点赞

0收藏

0分享

189下载

0评论

引用
【期刊论文】GLOBAL DYNAMICS OF ADVECTIONDOMINATED ACCRETION REVISITED
卢炬甫 ， JUFU LU， ， WEIMIN GU， AND FENG YUAN
THE ASTROPHYSICAL JOURNAL, 523: 340349, 1999 September 20，0001，（）：
1年11月30日
We numerically solve the set of dynamical equations describing advectiondominated accretion flows (ADAFs) around black holes, using a method similar to that of Chakrabarti. We choose the sonic radius of the
accretion,， accretion disksblack hole physicshydrodynamics

9浏览

0点赞

0收藏

0分享

157下载

0评论

引用
卢炬甫 ， JuFu Lu， and Feng Yuan
Mon. Not. R. Astron. Soc. 295, 6674 (1998)，0001，（）：
1年11月30日
This paper presents global solutions of adiabatic accretion flows with isothermal shocks in Kerr black hole geometry. It is known that in the previously studied cases, where the flow including the shock is either entirely adiabatic or entirely isothermal, there can be no more than one stable shock solution, and the solution can only be of ax type. However, the solution topology in the present case shows remarkable new characteristics: for the same flow parameters there can be two stable shock solutions satisfying physical boundary conditions, and the solution can be of three types, namely ax, xa and aa type. In addition, shocks in the present case occur for a parameter region different from that for RankineHugoniot shocks. These results greatly increase the possibilities of shock formation in astrophysical flows. It is also significant that the effects of framedragging of a rapid Kerr black hole on the shock formation are discovered. Finally, a brief comparison is made between shocked inviscid flows and two types of shockfree viscous flows, namely those of Shakura & Sunyaev and Narayan & Yi, and some comments are made about the fact that numerous authors who have studied transonic global solutions of accretion flows have found no shocks.
accretion,， accretion discsblack hole physicshydrodynamicsshock waves.，

17浏览

0点赞

0收藏

0分享

175下载

0评论

引用
【期刊论文】Standing RankineHugoniot shocks in accretion and wind flows in Kerr geometry
卢炬甫 ， JuFu Lu， ， K.N. Yu， Feng Yuan， and E.C.M. Young
Astron. Astrophys. 321, 665671 (1997)，0001，（）：
1年11月30日
This paper presents a fully relativistic study on the standing shock formation in thin, stationary, axisymmetric, adiabatic fluid flows in Kerr geometry. Wend out the energyangular momentum parameter space for which the flow may develop shocks. The multiplicity of the formal shock location is removed by employing the boundary conditions and stability analysis: the stable shock location is practically unique. The effects of the framedragging of a rapid rotating black hole on the shock properties are pointed out. Finally, we discuss the validity of the assumptions made about the flow and conclude that shocks are likely to be common in astrophysical flows.
accretion,， accretion disksblack hole physicshydrodynamicsrelativityshock waves

10浏览

0点赞

0收藏

0分享

241下载

0评论

引用
【期刊论文】Isothermal Shocks in Adiabatic BlackHole Accretion Flows
卢炬甫 ， JuFu LU， and Feng YUAN
Publ. Astron. Soc. Japan 49, 525533 (1997)，0001，（）：
1年11月30日
This paper presents global solutions of adiabatic accretion flows with isothermal shocks in the potential of a nonrotating black hole. It is known that in the previously studied cases, where flow including shock is either entirely adiabatic or entirely isothermal, there can be no more than one stable shock solution, and the solution can only be of the ax type; however, the solution topology in the present case shows new remarkable characteristics: for the same flow parameters there can be two stable shock solutions satisfying the physical boundary conditions, and the solution can be of three types, namely ax, xa, and aa type. In addition, shocks in the present case occur for a parameter region that is different from that for RankineHugoniot shocks to occur. These results greatly increase the possibilities of shock formation in astrophysical flows. It is also noted that in the present case the efficiency of energy release at the shock can be as high as a few percent. Finally, a brief comparison is made between shocked inviscid flows and two types of shockfree viscous flow, namely that of Shakura and Sunyaev (1973, AAA 09.066.049) and that of Narayan and Yi (1994, AAA 61.064.083).
Accretion,， accretion disksBlack holesHydrodynamicsShock waves

26浏览

0点赞

0收藏

0分享

134下载

0评论

引用
【期刊论文】On the Keplerian circular motion of relativistic fluids
卢炬甫 ， JuFu Lu， K.N. Yu， and E.C.M. Young
Astron. Astrophys. 304, 662666 (1995)，0001，（）：
1年11月30日
We clarify the concept of Keplerian circular motion of fluidsin the theory of general relativity, showing how it overlaps with as well as differs from the counterpart in the particle case. Applying the concept to the study of accretion disks, we prove a constraint on the sonic transition of accretion flows.
accretion disksblack hole physicshydrodynamicsrelativity

15浏览

0点赞

0收藏

0分享

71下载

0评论

引用
【期刊论文】Jets with angular momentum from the vicinity of Kerr black holes
卢炬甫 ， J.F. Lu， and S. Pineault
Astron. Astrophys. 229, 416423 (1990)，0001，（）：
1年11月30日
The motion of adiabatic jets propagating along the symmetry axis of a Kerr black hole is studied in the case where the outflowing matter possesses angular momentum. A simple parametrization is used for the crosssectional area of the jets and the results applied to conical and paraboloidal jets. Inclusion of angular momentum in the outflowing material has the effect of shifting the critical point inward closer to the black hole, thus contributing to the radial acceleration of the flow. When the black hole is rotating, this inward shift is more pronounced for direct flows than retrograde ones: for a maximally rotating Kerr hole, the relative shift (with respect to a Schwarzschild black hole) varies from about 12% to 30% for the range of values of angular momentum considered. Rotation in the outflowing matter has the effect of reducing the mass outflow rate. Other parameters being the same, conical jets have their critical points considerably closer to the black hole than paraboloidal jets.
black holesgalaxies: jets ofhydrodynamicsrelativity

18浏览

0点赞

0收藏

0分享

88下载

0评论

引用
【期刊论文】Accretion diskdriven jet precession in active galactic nuclei
卢炬甫 ， J. F. Lu，
Astron. Astrophys. 229, 424426 (1990)，0001，（）：
1年11月30日
The diskdriven precession model, proposed originally for SS 433 by Sarazin et al. (1980), is applied to extragalactic radio jets. Byeresenting a statistical relationship between the precession period and optical luminosity fo the sources, it is shown that the observational evidence is in favor of the model.
accretion disksblacl holesgalaxies: jets foquasars: jets of

16浏览

0点赞

0收藏

0分享

65下载

0评论

引用
【期刊论文】Adiabatic jets from funnels of thick disks
卢炬甫 ， J. F. Lu，
Astron. Astrophys. 168, 346348 (1986)，0001，（）：
1年11月30日
Transonic motion of adiabatic jets from funnels of thick accretion disks around Kerr black holes is studied. Provided the matter at the bottom of the funnel possesses a high enough enthalpy, the location of the sonic point of the flow can be very close to its lower limit, and an extremely relativistic terminal velocity can be achieved.
black holesjetshydrodynamicsrelativity

13浏览

0点赞

0收藏

0分享

89下载

0评论

引用
【期刊论文】Nonuniqueness of transonic solution for accretion onto a Schwarzschild black hole
卢炬甫 ， J. F. Lu，
Astron. Astrophys. 148, 176178 (1985)，0001，（）：
1年11月30日
Received September 10, 1984; accepted February 12, 1985 Summary. The fact that the adiabatic transonic accretion of rotating matter onto a black hole has nonunique, bimodal, solution was demonstrated previously only in terms of an approximate, Newtonian, model. Here the correct generalrelativistic equations are used to prove the bimodal character of accretion onto a Schwarzschild black hole.
black holesstars: accretionrelativity

14浏览

0点赞

0收藏

0分享

76下载

0评论

引用