Determining PPN gamma with Gaia's astrometric core solution
(2010) 261st Symposium of the International-Astronomical-Union 261. p.315-319- Abstract
- The ESA space astrometry mission Gala, due for launch in early 2012, will in addition to its huge output of fundamental astrometric and astrophysical data also provide stringent tests of general relativity. In this paper we present an updated analysis of Gaia's capacity to measure the PPN parameter gamma as part of its core astrometric solution. The analysis is based on small-scale astrometric solutions taking into account the simultaneous determination of stellar astrometric parameters and the satellite attitude. In particular, the statistical correlation between PPN gamma and the stellar parallaxes is considered. Extrapolating the results to a full-scale solution using some 100 million stars, we find that PPN gamma could be obtained to... (More)
- The ESA space astrometry mission Gala, due for launch in early 2012, will in addition to its huge output of fundamental astrometric and astrophysical data also provide stringent tests of general relativity. In this paper we present an updated analysis of Gaia's capacity to measure the PPN parameter gamma as part of its core astrometric solution. The analysis is based on small-scale astrometric solutions taking into account the simultaneous determination of stellar astrometric parameters and the satellite attitude. In particular, the statistical correlation between PPN gamma and the stellar parallaxes is considered. Extrapolating the results to a full-scale solution using some 100 million stars, we find that PPN gamma could be obtained to about 10(-6), which is significantly better than today's best estimate from the Cassini mission of 2 x 10(-5). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1678383
- author
- Hobbs, David
LU
; Holl, Berry LU ; Lindegren, Lennart LU
; Raison, Frederic ; Klioner, Sergei and Butkevich, Alexey
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- data analysis, gravitation, Astrometry, relativity
- host publication
- Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium)
- volume
- 261
- pages
- 315 - 319
- publisher
- Cambridge University Press
- conference name
- 261st Symposium of the International-Astronomical-Union
- conference dates
- 2009-04-27 - 2009-05-01
- external identifiers
-
- wos:000280569700050
- scopus:84864434714
- ISSN
- 1743-9221
- 1743-9213
- DOI
- 10.1017/S1743921309990561
- language
- English
- LU publication?
- yes
- id
- c9c388ef-d6ce-4c09-9a20-96e35462216f (old id 1678383)
- date added to LUP
- 2016-04-01 10:29:52
- date last changed
- 2025-01-14 16:19:59
@inproceedings{c9c388ef-d6ce-4c09-9a20-96e35462216f, abstract = {{The ESA space astrometry mission Gala, due for launch in early 2012, will in addition to its huge output of fundamental astrometric and astrophysical data also provide stringent tests of general relativity. In this paper we present an updated analysis of Gaia's capacity to measure the PPN parameter gamma as part of its core astrometric solution. The analysis is based on small-scale astrometric solutions taking into account the simultaneous determination of stellar astrometric parameters and the satellite attitude. In particular, the statistical correlation between PPN gamma and the stellar parallaxes is considered. Extrapolating the results to a full-scale solution using some 100 million stars, we find that PPN gamma could be obtained to about 10(-6), which is significantly better than today's best estimate from the Cassini mission of 2 x 10(-5).}}, author = {{Hobbs, David and Holl, Berry and Lindegren, Lennart and Raison, Frederic and Klioner, Sergei and Butkevich, Alexey}}, booktitle = {{Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium)}}, issn = {{1743-9221}}, keywords = {{data analysis; gravitation; Astrometry; relativity}}, language = {{eng}}, pages = {{315--319}}, publisher = {{Cambridge University Press}}, title = {{Determining PPN gamma with Gaia's astrometric core solution}}, url = {{http://dx.doi.org/10.1017/S1743921309990561}}, doi = {{10.1017/S1743921309990561}}, volume = {{261}}, year = {{2010}}, }