Variation of fundamental parameters and dark energy: A principal component approach

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Martins, CJAP (Autor) Outra

Revista

Título: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 86 Nº 025008

Página Inicial: 063515

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 21 Citações

Scopus - 20 Citações

Outras Informações

ID Authenticus: P-002-5EX

DOI: 10.1103/physrevd.86.063515

Abstract (EN): Received 12 October 2011; revised manuscript received 8 August 2012; published 17 September 2012) We discuss methods based on principal component analysis to constrain the dark energy equation of state using a combination of Type Ia supernovae at low redshift and spectroscopic measurements of varying fundamental couplings at higher redshifts. We discuss the performance of this method when future better-quality data sets are available, focusing on two forthcoming European southern observatory (ESO) spectrographs-Echelle spectrograph for rocky exoplanet and stable spectroscopic observations (ESPRESSO) for the very large telescope (VLT) and Cosmic dynamics explorer (CODEX) for the European extremely large telescope (E-ELT)-which include these measurements as a key part of their science cases. These can realize the prospect of a detailed characterization of dark energy properties almost all the way up to redshift 4.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9