Exact solutions for shells collapsing towards a pre-existing black hole
Liu, Y; Zhang SN(张双南); Zhang, SN
刊名PHYSICS LETTERS B
2009
卷号679期号:2页码:#REF!
关键词Black holes Classical theories of gravity Space-time singularities
学科分类Physics
DOI10.1016/j.physletb.2009.07.033
通讯作者Liu, Y (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
文章类型Article
英文摘要The gravitational collapse of a star is an important issue both for general relativity and astrophysics, which is related to the well-known "frozen star" paradox. This paradox has been discussed intensively and seems to have been solved in the comoving-like coordinates. However, to a real astrophysical observer within a finite time, this problem should be discussed in the point of view of the distant rest-observer, which is the main purpose of this Letter. Following the seminal work of Oppenheimer and Snyder (1939), we present the exact solution for one or two dust shells collapsing towards a pre-existing black hole. We find that the metric of the inner region of the shell is time-dependent and the clock inside the shell becomes slower as the shell collapses towards the pre-existing black hole. This means the inner region of the shell is influenced by the property of the shell, which is contrary to the result in Newtonian theory. It does not contradict the Birkhofrs theorem, since in our case we cannot arbitrarily select the clock inside the shell in order to ensure the continuity of the metric. This result in principle may be tested experimentally if a beam of light travels across the shell, which will take a longer time than without the shell. It can be considered as the generalized Shapiro effect, because this effect is due to the mass outside, but not inside as the case of the standard Shapiro effect. We also found that in real astrophysical settings matter can indeed cross a black hole's horizon according to the clock of an external observer and will not accumulate around the event horizon of a black hole, i.e., no "frozen star" is formed for an external observer as matter falls towards a black hole. Therefore, we predict that only gravitational wave radiation can be produced in the final stage of the merging process of two coalescing black holes. Our results also indicate that for the clock of an external observer. matter, after crossing the event horizon, will never arrive at the "singularity" (i.e. the exact center of the black hole), i.e., for all black holes with finite lifetimes their masses are distributed within their event horizons, rather than concentrated at their centers. We also present a worked-out example of the Hawking's area theorem. (C) 2009 Published by Elsevier B.V.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:000269479800002
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226054
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
推荐引用方式
GB/T 7714
Liu, Y,Zhang SN,Zhang, SN. Exact solutions for shells collapsing towards a pre-existing black hole[J]. PHYSICS LETTERS B,2009,679(2):#REF!.
APA Liu, Y,张双南,&Zhang, SN.(2009).Exact solutions for shells collapsing towards a pre-existing black hole.PHYSICS LETTERS B,679(2),#REF!.
MLA Liu, Y,et al."Exact solutions for shells collapsing towards a pre-existing black hole".PHYSICS LETTERS B 679.2(2009):#REF!.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1035.pdf(356KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liu, Y]的文章
[张双南]的文章
[Zhang, SN]的文章
百度学术
百度学术中相似的文章
[Liu, Y]的文章
[张双南]的文章
[Zhang, SN]的文章
必应学术
必应学术中相似的文章
[Liu, Y]的文章
[张双南]的文章
[Zhang, SN]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 1035.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。