Gravitational astrometry from within the solar system
Date Issued
2018
Author(s)
Abstract
Mission like Gaia (ESA, launched in 2013) requires to treat gravity properly when compiling microsecond stellar catalogues. This will open the opportunity to put in practice methods of Relativistic Astrometry mainly devoted to model the celestial sphere with the percepts of General Relativity (GR) and promotes the use of highly accurate astrometry to test locally fundamental physics. Gaia will be able to carry out general relativistic tests by means of both global and differential astrometric measurements. Global tests will be done through the full astrometric reconstruction of the celestial sphere, while the differential experiments will be implemented in the form of repeated Eddington-like measurements. After one century, Gaia will perform the largest experiment in GR ever made with astrometric methods (since 1919): a relativistic all-sky reconstruction which includes also QSO at different redshifts. Moreover, at zero redshift, dealing with local cosmology, accurate absolute motions of stars within our Galaxy will provide tests on current cosmological models via the detections of cosmological signatures in the disk and halo.
Coverage
The Fourteenth Marcel Grossmann Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories : Proceedings of the MG14 Meeting on General Relativity
All editors
Bianchi, Massimo; Jantzen, Robert T.; Ruffini, Remo
Start page
3707
Conferenece
14th Marcel Grossman Meeting on General Relativity
Conferenece place
Roma, University "La Sapienza"
Conferenece date
12-18 July, 2015
Ads BibCode
2018mgm..conf.3707C
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
9789813226609_0485.pdf
Description
Pdf editoriale
Size
135.63 KB
Format
Adobe PDF
Checksum (MD5)
1bac34c3679369e40c38ed0b3e0aa583