On trapped surface formation in gravitational collapse
نویسندگان
چکیده
A class of perfect fluid collapse models is constructed to examine the final fate of a continual gravitational collapse. While the pressure could be negative in the interior of the cloud, the weak-energy condition is satisfied. The collapsing star radiates away its matter as the process of gravitational collapse evolves, so as to avoid the formation of trapped surfaces. The collapsing interior is matched to an exterior, which is a generalized Vaidya spacetime, to complete the model. The implications of such a result towards the resolution of the singularity issue and various black hole paradoxes at classical and quantum levels are indicated. PACS numbers: 04.20.Dw, 04.70.−s, 04.70.Bw
منابع مشابه
A new proof for non-occurrence of trapped surfaces in spherical collapse
We present here a very simple, short and new proof which shows that no trapped surface is ever formed in spherical gravitational collapse of isolated bodies. Although this derivation is of purely mathematical nature and without any assumption, it is shown, in the Appendix, that, physically, trapped surfaces do not form in order that the 3 speed of the fluid as measured by an observer at a fixed...
متن کاملانقباض گرانشی یک لایه نورگونه با تقارن استوانه‌ای در خلاء
Barrabès-Israel null shell formalism is used to study the gravitational collapse of a thin cylindrical null shell in vacuum. In general the lightlike matter shell whose history coincides with a null hypersurface is characterized by a surface energy density. In addition, a gravitational impulsive wave is present on this null hypersurface whose generators admit both the shear and expansion. In ...
متن کاملExploring an S-matrix for gravitational collapse
We analyze further a recently proposed S-matrix description of transplanckian scattering in the specific case of axisymmetric collisions of extended sources, where some of the original approximations are not necessary. We confirm the claim that such an approximate description appears to capture the essential features of (the quantum counterpart of) classical gravitational collapse. More specifi...
متن کاملA new proof for non-occurrence of trapped surfaces and information paradox
We present here a very simple, short and new proof which shows that no trapped surface is ever formed in spherical gravitational collapse of isolated bodies. Although this derivation is of purely mathematical nature and without any assumption, it is shown, in the Appendix, that, physically, trapped surfaces do not form in order that the 3 speed of the fluid as measured by an observer at a fixed...
متن کاملCritical Formation of Trapped Surfaces in the Collision of Non-expanding Gravitational Shock Waves in de Sitter Space-Time
We study the formation of marginally trapped surfaces in the head-on collision of two shock waves in de Sitter space-time as a function of the cosmological constant and the energy of the shock wave. For D = 4 it is shown that there exists a critical value of the ratio of these quantities above which no solution to the trapped surface equation is found. For the ratio below the critical value the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007