Determining PPN gamma with Gaia's astrometric core solution

David Hobbs; Berry Holl; Lennart Lindegren; Frederic Raison; Sergei Klioner; Alexey Butkevich

doi:10.1017/S1743921309990561

Determining PPN gamma with Gaia's astrometric core solution

David Hobbs, Berry Holl, Lennart Lindegren, Frederic Raison, Sergei Klioner, Alexey Butkevich

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

Sammanfattning

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).

Originalspråk	engelska
Titel på värdpublikation	Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium)
Förlag	Cambridge University Press
Sidor	315-319
Volym	261
DOI	https://doi.org/10.1017/S1743921309990561
Status	Published - 2010
Evenemang	261st Symposium of the International-Astronomical-Union - Virginia Beach, VA Varaktighet: 2009 apr. 27 → 2009 maj 1

Publikationsserier

Namn
Volym	261
ISSN (tryckt)	1743-9221
ISSN (elektroniskt)	1743-9213

Konferens

Konferens	261st Symposium of the International-Astronomical-Union
Period	2009/04/27 → 2009/05/01

Ämnesklassifikation (UKÄ)

Astronomi, astrofysik och kosmologi

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10.1017/S1743921309990561

Citera det här

@inproceedings{c9c388efd6ce4c099a2096e35462216f,

title = "Determining PPN gamma with Gaia's astrometric core solution",

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).",

keywords = "data analysis, gravitation, Astrometry, relativity",

author = "David Hobbs and Berry Holl and Lennart Lindegren and Frederic Raison and Sergei Klioner and Alexey Butkevich",

year = "2010",

doi = "10.1017/S1743921309990561",

language = "English",

volume = "261",

publisher = "Cambridge University Press",

pages = "315--319",

booktitle = "Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium)",

address = "United Kingdom",

note = "261st Symposium of the International-Astronomical-Union ; Conference date: 27-04-2009 Through 01-05-2009",

}

Hobbs, D, Holl, B, Lindegren, L, Raison, F, Klioner, S & Butkevich, A 2010, Determining PPN gamma with Gaia's astrometric core solution. i Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium). vol. 261, Cambridge University Press, s. 315-319, 261st Symposium of the International-Astronomical-Union, 2009/04/27. https://doi.org/10.1017/S1743921309990561

Determining PPN gamma with Gaia's astrometric core solution. / Hobbs, David; Holl, Berry; Lindegren, Lennart et al.
Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium). Vol. 261 Cambridge University Press, 2010. s. 315-319.

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

TY - GEN

T1 - Determining PPN gamma with Gaia's astrometric core solution

AU - Hobbs, David

AU - Holl, Berry

AU - Lindegren, Lennart

AU - Raison, Frederic

AU - Klioner, Sergei

AU - Butkevich, Alexey

PY - 2010

Y1 - 2010

N2 - 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).

AB - 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).

KW - data analysis

KW - gravitation

KW - Astrometry

KW - relativity

U2 - 10.1017/S1743921309990561

DO - 10.1017/S1743921309990561

M3 - Paper in conference proceeding

VL - 261

SP - 315

EP - 319

BT - Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis (IAU Symposium)

PB - Cambridge University Press

T2 - 261st Symposium of the International-Astronomical-Union

Y2 - 27 April 2009 through 1 May 2009

ER -

Determining PPN gamma with Gaia's astrometric core solution

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