Results 21 to 30 of about 92,572 (312)
Reheating via gravitational particle production in simple models of quintessence or $\Lambda$CDM inflation [PDF]
, 2017 We have tested some simple $\Lambda$CDM (the same test is also valid for quintessence) inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck's team and leading to a reheating temperature, which is ...
Haro, Jaume, Saló, Llibert Aresté
core +4 more sources
Temporal and Spectral Variability of OJ 287 before the April–June 2020 Outburst
Galaxies, 2020 We present the results of a temporal and spectral study of the BL Lacertae object OJ 287 in optical, UV, and X-ray bands with observations performed by Swift satellite during September 2019–March 2020.
Nibedita Kalita +2 more
doaj +1 more source
Predicting cosmological observables with PyCosmo
Astronomy and Computing, 2021 Astronomy and Computing ...
F. Tarsitano +9 more
openaire +3 more sources
Cosmological observations in non-local F(R) cosmology [PDF]
Astrophysics and Space Science, 2011 12 pages, 7 figures, will be published in Astrophysics and space ...
Farajollahi, H. +3 more
openaire +3 more sources
Observational aspects of an inhomogeneous cosmology [PDF]
Proceedings of VIII International Workshop on the Dark Side of the Universe — PoS(DSU 2012), 2013 One of the biggest mysteries in cosmology is Dark Energy, which is required to explain the accelerated expansion of the universe within the standard model. But maybe one can explain the observations without introducing new physics, by simply taking one step back and re-examining one of the basic concepts of cosmology, homogeneity. In standard cosmology,
Saulder, Christoph +2 more
openaire +3 more sources
Observational constraints on cosmological superstrings [PDF]
Theoretical Physics, 2016 From theoretical point of view and not being in contradiction with current observational data, the cosmic strings should have fundamentally different origin and are characterized by wide range of energies. The paper is devoted to search for possible cosmological observational tests on superstring theory, among them to identification of observational ...
O. S. Sazhina, A. I. Mukhaeva
openalex +3 more sources
“Observables” in causal set cosmology [PDF]
Physical Review D, 2003 LaTeX, 1+19 pages, 2 ...
Brightwell, Graham +4 more
openaire +2 more sources
Observational cosmology using characteristic numerical relativity
, 2010 The characteristic formalism in numerical relativity, which has been developed to study gravitational waves, and the observer metric approach in observational cosmology both make use of coordinate systems based on null cones.
Bishop, N. T., van der Walt, P. J.
core +1 more source
Statefinder diagnostic for cosmology with the abnormally weighting energy hypothesis
, 2007 In this paper, we apply the statefinder diagnostic to the cosmology with the Abnormally Weighting Energy hypothesis (AWE cosmology), in which dark energy in the observational (ordinary matter) frame results from the violation of weak equivalence ...
A. Füzfa +22 more
core +1 more source
Reionization and Cosmology with 21 cm Fluctuations [PDF]
, 2009 Measurement of the spatial distribution of neutral hydrogen via the redshifted 21 cm line promises to revolutionize our knowledge of the epoch of reionization and the first galaxies, and may provide a powerful new tool for observational cosmology from ...
J. Stuart B. Wyithe +4 more
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