Refining the relativistic model for Gaia: Cosmological effects in the BCRS

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

This paper represents a first attempt of embedding the Barycentric Celestial Reference System, the fundamental relativistic reference system to be used for the modelling of Gaia observations, into some cosmological background. The general Robertson-Walker metric is transformed into local coordinates where the cosmological effects are represented as tidal potentials. A version of a cosmological BCRS is then suggested to lowest order. The effects of cosmological background on the motion of the Solar System are estimated and found to be completely negligible. The relation to the de Sitter and Schwarzschild-de Sitter solutions is discussed.

Details

Original languageEnglish
Title of host publicationProceeding of Symposium “The Three-Dimensional Universe with Gaia”
Pages305-308
Number of pages4
Publication statusPublished - 2005
Peer-reviewedYes

Publication series

SeriesEuropean Space Agency, (Special Publication) ESA SP
VolumeSP-576
ISSN0379-6566

Conference

TitleSymposium - The Three-Dimensional Universe with Gaia
Duration4 - 7 October 2004
CityParis
CountryFrance

External IDs

Scopus 23744496045
ORCID /0000-0003-4682-7831/work/170585853

Keywords

Keywords

  • Cosmology, Gaia reference frame, Relativity