Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Wiltshire, D. L."'
Autor:
Buchert, T., Carfora, M., Ellis, G. F. R., Kolb, E. W., MacCallum, M. A. H., Ostrowski, J. J., Räsänen, S., Roukema, B. F., Andersson, L., Coley, A. A., Wiltshire, D. L.
Publikováno v:
Class. Quantum Grav. 32 (2015) 215021
No. In a number of papers Green and Wald argue that the standard FLRW model approximates our Universe extremely well on all scales, except close to strong field astrophysical objects. In particular, they argue that the effect of inhomogeneities on av
Externí odkaz:
http://arxiv.org/abs/1505.07800
The unexpected dimness of Type Ia supernovae at redshifts z >~ 1 has over the past 7 years been seen as an indication that the expansion of the universe is accelerating. A new model cosmology, the "fractal bubble model", has been proposed by one of u
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504192
Autor:
Mignemi, S., Wiltshire, D. L.
Publikováno v:
Phys.Rev. D70 (2004) 124012
We generalize a class of magnetically charged black holes holes non-minimally coupled to two scalar fields previously found by one of us [gr-qc/9910041] to the case of multiple scalar fields. The black holes possess a novel type of primary scalar hai
Externí odkaz:
http://arxiv.org/abs/hep-th/0408215
Autor:
Schreiber, K. U., Velikoseltsev, A., Rothacher, M., Klugel, T., Stedman, G. E., Wiltshire, D. L.
Publikováno v:
J.Geophys.Res. 109 (2004) B06405
We report the first direct measurements of the very small effect of forced diurnal polar motion, successfully observed on three of our large ring lasers, which now measure the instantaneous direction of Earth's rotation axis to a precision of 1 part
Externí odkaz:
http://arxiv.org/abs/physics/0406156
Autor:
Gibbons, G. W., Wiltshire, D. L.
Publikováno v:
Nucl.Phys.B287:717,1987
By means of a simple model we investigate the possibility that spacetime is a membrane embedded in higher dimensions. We present cosmological solutions of d-dimensional Einstein-Maxwell theory which compactify to two dimensions. These solutions are a
Externí odkaz:
http://arxiv.org/abs/hep-th/0109093
Autor:
Ng, S. C. C., Wiltshire, D. L.
Publikováno v:
Phys.Rev. D64 (2001) 123519
We investigate the potential of a future supernovae data set, as might be obtained by the proposed SNAP satellite, to discriminate between two possible explanations for the observed dimming of the high redshift type IA supernovae, namely either (i) a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107142
Autor:
Wiltshire, D. L.
This is an introductory set of lecture notes on quantum cosmology, given in 1995 to an audience with interests ranging from astronomy to particle physics. Topics covered: 1. Introduction: 1.1 Quantum cosmology and quantum gravity; 1.2 A brief history
Externí odkaz:
http://arxiv.org/abs/gr-qc/0101003
Autor:
Wiltshire, D. L.
Quintessence models with a dark energy generated by pseudo Nambu-Goldstone bosons provide a natural framework in which to test the possibility that type Ia supernovae luminosity distance measurements are at least partially due to an evolution of the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010443
Autor:
Ng, S. C. C., Wiltshire, D. L.
Publikováno v:
Phys.Rev. D63 (2001) 023503
We study observational constraints on cosmological models with a quintessence field in the form of a dynamical pseudo Nambu-Goldstone boson. After reviewing the properties of the solutions, from a dynamical systems phase space analysis, we consider t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0004138
Autor:
Wiltshire, D. L.
Publikováno v:
Gen.Rel.Grav.32:515-528,2000
We derive exact series solutions for the Wheeler-DeWitt equation corresponding to a spatially closed Friedmann-Robertson-Walker universe with cosmological constant for arbitrary operator ordering of the scale factor of the universe. The resulting wav
Externí odkaz:
http://arxiv.org/abs/gr-qc/9905090