General Relativity and Gravitation
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
Consistency of the mass variation formula for black holes accreting cosmological fluids
General Relativity and Gravitation - Tập 44 - Trang 985-992 - 2011
We address the spherical accretion of generic fluids onto black holes. We show that, if the black hole metric satisfies certain conditions, in the presence of a test fluid it is possible to derive a fully relativistic prescription for the black hole mass variation. Although the resulting equation may seem obvious due to a form of it appearing as a step in the derivation of the Schwarzschild metric...... hiện toàn bộ
Perfect Fluids: Field-theoretical Description and Gauge Symmetry Issue
General Relativity and Gravitation - - 1999
We show that combinations of (in general,non-linear) two- and threeform fields, analogous to theMaxwell (one-form) field, completely describe perfectfluids, including the rotating ones. In the non-rotating case, the two-form field is sufficient, and afree three-form field proves to be equivalent toappearance of the cosmological term in Einstein'sequations (the square-root non-linearity correspondi...... hiện toàn bộ
Quantum-Gravitational Diffusion and Stochastic Fluctuations in the Velocity of Light
General Relativity and Gravitation - Tập 32 - Trang 127-144 - 2000
We argue that quantum-gravitational fluctuations in the space-time background give the vacuum non-trivial optical properties that include diffusion and consequent uncertainties in the arrival times of photons, causing stochastic fluctuations in the velocity of light in vacuo. Our proposal is motivated within a Liouville string formulation of quantum gravity that also suggests a frequency-dependent...... hiện toàn bộ
A quantum viewpoint of gravitational radiation
General Relativity and Gravitation - Tập 22 Số 5 - Trang 501-505 - 1990
Entropy của các Lỗ Đen Đối Xứng Spherically Do các Trường Spin Tùy Ý Dịch bởi AI
General Relativity and Gravitation - Tập 34 - Trang 1193-1205 - 2002
Bằng cách sử dụng mô hình màng dựa trên mô hình tường gạch, chúng tôi đã tính toán năng lượng tự do và entropi của các lỗ đen đối xứng cầu do spin tùy ý. Kết quả cho thấy entropi của một trường vô hướng và entropi của một trường Fermionic có công thức tương tự nhau. Chỉ có một hệ số nằm giữa chúng.
#lỗ đen #entropi #mô hình màng #spin #trường vô hướng #trường fermionic
Effects of expanding dark universe on the astrophysical limits
General Relativity and Gravitation - Tập 54 Số 8 - Trang 1-14 - 2022
In this paper, gravitational field within a spherically symmetric star overwhelmed through dynamical de Sitter space is obtained. Indeed, closer situation to reality manifesting effects of the dark energy on the properties of astronomical compact objects is considered. It seems the cosmological constant does not play an outstanding role in astronomical scales, however I showed that mass of a typca...... hiện toàn bộ
Some peculiarities of motion of neutral and charged test particles in the field of a spherically symmetric charged object in general relativity
General Relativity and Gravitation - Tập 43 - Trang 1347-1363 - 2011
We propose the method of investigation of radial motions for charged and neutral test particles in the Reissner–Nordström field by means of mass potential. In this context we analyze special features of interaction of charges and their motions in General Relativity and construct the radial motion classification. For test particles and a central source with charges q and Q, respectively, the condit...... hiện toàn bộ
A note on the solution of a spinor equation
General Relativity and Gravitation - Tập 27 - Trang 973-979 - 1995
An equation of spinor algebra, which is specified by two positive integers,M andN, is solved by relating it to the problem of integrating a two-dimensional Hamiltonian homogeneous polynomial system of ordinary differential equations, whose degree isN}-1. The case in whichN=1 reduces to a well-known result of spinor algebra. The caseM=N=4 is of relevance in the study of symmetry operators of Maxwel...... hiện toàn bộ
Letter: Spherically Symmetric Metrics with Shear Controlling Expansion
General Relativity and Gravitation - Tập 36 - Trang 459-464 - 2004
An isotropic spatially inhomogeneous spacetime with the stress tensor satisfying the limiting case of the strong energy condition [T00 + 1/2)T] = 0 in the locally inertial coordinates where the observer's four-velocity is u
a = δ0
a satisfying the constraint u
a ua = −1 is studied. Special metrics with accelerating expansions of the inhomogeneous spacetime merely controlled by the shear are presen...... hiện toàn bộ
2012 Awards for essays on gravitation
General Relativity and Gravitation - Tập 43 - Trang 3237-3238 - 2011
Tổng số: 4,792
- 1
- 2
- 3
- 4
- 5
- 6
- 10