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CALCULO DIDACTICO DE LA EDAD DEL UNIVERSO Y LA IMPORTANCIA DE LA CONSTANTE COSMOLOGICA EN UN MODELO FRW
(Lat. Am. J. Phys. Educ, 2013-01-16)
Bayesian correction of H(z) data uncertainties
(2018-07-01)
We compile 41 H(z) data from literature and use them to constrain OΛCDM and flat ΛCDM parameters. We show that the available H(z) suffers from uncertainties overestimation and propose a Bayesian method to reduce them. As ...
The cosmic coincidence in Brans–Dicke cosmologies
(2005)
Among the suggested solutions to the cosmological constant problem, we nd the idea
of a dynamic vacuum, with an energy density decaying with the universe expansion. We
investigate the possibility of a variation in the ...
Dark energy parametrizations and their effect on dark halos
(Iop Publishing Ltd, 2006-07-01)
There are a plethora of dark energy parametrizations that can fit current supernovae Ia data. However, these data are only sensitive to redshifts up to order one. In fact, many of these parametrizations break down at higher ...
Dark energy parametrizations and their effect on dark halos
(Iop Publishing Ltd, 2006-07-01)
There are a plethora of dark energy parametrizations that can fit current supernovae Ia data. However, these data are only sensitive to redshifts up to order one. In fact, many of these parametrizations break down at higher ...
Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
(2009)
Chandra observations of large samples of galaxy clusters detected in X-rays by ROSAT provide a new, robust determination of the cluster mass functions at low and high redshifts. Statistical and systematic errors are now ...
Dark energy parametrizations and their effect on dark halos
(Iop Publishing Ltd, 2014)
Compatibility of the large quasar groups with the concordance cosmological model
(2016)
We study the compatibility of large quasar groups with the concordance cosmological model. Large quasar groups are very large spatial associations of quasars in the cosmic web, with sizes of 50-250 h(-1) Mpc. In particular, ...
THE ATACAMA COSMOLOGY TELESCOPE: COSMOLOGY FROM GALAXY CLUSTERS DETECTED VIA THE SUNYAEV–ZEL’DOVICH EFFECT
(The Astrophysical Journal, 2011)