%0 Journal Article
%X The cosmological constant Lambda, i.e., the energy density stored in the true vacuum state of all existing fields in the Universe, is the simplest and the most natural possibility to describe the current cosmic acceleration. However, despite its observational successes, such a possibility exacerbates the well-known Lambda problem, requiring a natural explanation for its small, but nonzero, value. In this paper we study cosmological consequences of a scenario driven by a varying cosmological term, in which the vacuum energy density decays linearly with the Hubble parameter, Lambda[proportional]H. We test the viability of this scenario and study a possible way to distinguish it from the current standard cosmological model by using recent observations of type Ia supernova (Supernova Legacy Survey Collaboration), measurements of the baryonic acoustic oscillation from the Sloan Digital Sky Survey, and the position of the first peak of the cosmic microwave background angular spectrum from the three-year Wilkinson Microwave Anisotropy Probe.
%8 Abril
%T Observational constraints on late-time Lambda(t) cosmology
%K Observational constraints, Lambda(t), COSMOLOGY.
%@nexthigherunit 8JMKD3MGPCW/3EUAPES
%@secondarytype PRE PI
%@archivingpolicy denypublisher denyfinaldraft24
%@usergroup administrator
%@usergroup banon
%@usergroup rosemary
%@group
%@group
%@group CRN-CIE-INPE-MCT-BR
%3 Observational constraints on late-time Lambda(t) cosmology.htm
%@secondarykey INPE--PRE/
%@issn 0378-4371
%2 sid.inpe.br/mtc-m17@80/2008/05.14.10.56.06
%@affiliation Universidade Federal da Bahia. Instituto de Física
%@affiliation Observatório Nacional. Departamento de Astronomia
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Physica A: Statistical Mechanics and its Applications
%@versiontype publisher
%4 sid.inpe.br/mtc-m17@80/2008/05.14.10.56
%@documentstage not transferred
%D 2008
%V 77
%@doi 10.1103/PhysRevD.77.083504
%A Carneiro, S.,
%A Dantas, M. A.,
%A Alcaniz, Jailson Souza de,
%@dissemination WEBSCI; PORTALCAPES.
%@area CEA
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}