Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Bell, Donald P."'
We present solutions of force-free pulsar magnetospheres coupled with a uniform external magnetic field aligned with the dipole magnetic moment of the pulsar. The inclusion of the uniform magnetic field has the following consequences: The equatorial
Externí odkaz:
http://arxiv.org/abs/1810.04177
Publikováno v:
2017 Class. Quantum Grav. 34 205006
We elucidate the dynamics of a thin spherical material shell with a tangential pressure, using a new approach. This is both simpler than the traditional method of extrinsic curvature junction conditions (which we also employ), and suggests an express
Externí odkaz:
http://arxiv.org/abs/1710.10360
Autor:
Lynden-Bell, Donald, Bičák, Jiří
Publikováno v:
Class. Quant. Grav. 33, 075001 (2016)
Lema\^{i}tre-Tolman-Bondi (LTB) solutions have traditionally been confined to systems with no pressure in which the gravity is due to massive dust, but the solutions are little changed in form if, as in cosmology, the pressure is uniform in space at
Externí odkaz:
http://arxiv.org/abs/1603.01479
Autor:
Lynden-Bell, Donald, Katz, Joseph
Large contributions to the near closure of the Universe and to the acceleration of its expansion are due to the gravitation of components of the stress-energy tensor other than its mass density. To familiarise astronomers with the gravitation of thes
Externí odkaz:
http://arxiv.org/abs/1312.6043
Autor:
Lynden-Bell, Donald, Katz, Joseph
Publikováno v:
Class. Quantum Grav. 29 (2012) 115010
In electromagnetism a current along a wire tightly wound on a torus makes a solenoid whose magnetic field is confined within the torus. In Einstein's gravity we give a corresponding solution in which a current of matter moves up on the inside of a to
Externí odkaz:
http://arxiv.org/abs/1205.1616
Publikováno v:
Biograph.Mem.Fell.Roy.Soc. 58:245-264 (2012)
Allan Sandage was an observational astronomer who was happiest at a telescope. On Hubble's sudden death Allan Sandage inherited the programmes using the world's largest optical telescope at Palomar to determine the distances and number counts of gala
Externí odkaz:
http://arxiv.org/abs/1111.5646
Publikováno v:
Class. Quantum Grav. 28 (2011) 065004
Starting from the gravitational potential of a Newtonian spheroidal shell we discuss electrically charged rotating prolate spheroidal shells in the Maxwell theory. In particular we consider two confocal charged shells which rotate oppositely in such
Externí odkaz:
http://arxiv.org/abs/1102.5242
Publikováno v:
Class. Quantum Grav. 25 (2008) 165018
We calculate the rotation of the inertial frames within an almost flat cylindrical region surrounded by a pulse of non-axially-symmetric gravitational waves that rotate about the axis of our cylindrical polar coordinates. Our spacetime has only one K
Externí odkaz:
http://arxiv.org/abs/0807.3077
Publikováno v:
Class. Quantum Grav. 25 (2008) 165017
Linear and rotational dragging effects of gravitational waves on local inertial frames are studied in purely vacuum spacetimes. First the linear dragging caused by a simple cylindrical pulse is investigated. Surprisingly strong transversal effects of
Externí odkaz:
http://arxiv.org/abs/0807.3072
Publikováno v:
Phys.Rev.D76:063501,2007
Linear perturbations of Friedmann-Robertson-Walker universes with any curvature and cosmological constant are studied in a general gauge without decomposition into harmonics. Desirable gauges are selected as those which embody best Mach's principle:
Externí odkaz:
http://arxiv.org/abs/0803.4106