Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry

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Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry. / Klioner, S. A.; Mignard, F.; Lindegren, L.; Bastian, U.; McMillan, P. J.; Hernandez, J.; Hobbs, D.; Ramos-Lerate, M.; Biermann, M.; Bombrun, A.; de Torres, A.; Gerlach, E.; Hilger, T.; Lammers, U.; Steidelmueller, H.; Stephenson, C. A.; Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; Babusiaux, C.; Creevey, O. L.; Evans, D. W.; Eyer, L.; Hutton, A.; Jansen, F.; Jordi, C.; Luri, X.; Panem, C.; Pourbaix, D.; Randich, S.; Sartoretti, P.; Soubiran, C.; Walton, N. A.; Arenou, F.; Bailer-Jones, C. A. L.; Cropper, M.; Drimmel, R.; Katz, D.; Lattanzi, M. G.; Fabricius, C.; Smith, M.; Anderson, R. I.; Hauser, M.; Lindstrom, H. E. P.; Morris, D.; Pagani, C.; Siebert, A.; Zhao, H.; Gaia Collaboration.

I: Astronomy & Astrophysics, Bind 649, A9, 28.04.2021.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Klioner, SA, Mignard, F, Lindegren, L, Bastian, U, McMillan, PJ, Hernandez, J, Hobbs, D, Ramos-Lerate, M, Biermann, M, Bombrun, A, de Torres, A, Gerlach, E, Hilger, T, Lammers, U, Steidelmueller, H, Stephenson, CA, Brown, AGA, Vallenari, A, Prusti, T, de Bruijne, JHJ, Babusiaux, C, Creevey, OL, Evans, DW, Eyer, L, Hutton, A, Jansen, F, Jordi, C, Luri, X, Panem, C, Pourbaix, D, Randich, S, Sartoretti, P, Soubiran, C, Walton, NA, Arenou, F, Bailer-Jones, CAL, Cropper, M, Drimmel, R, Katz, D, Lattanzi, MG, Fabricius, C, Smith, M, Anderson, RI, Hauser, M, Lindstrom, HEP, Morris, D, Pagani, C, Siebert, A, Zhao, H & Gaia Collaboration 2021, 'Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry', Astronomy & Astrophysics, bind 649, A9. https://doi.org/10.1051/0004-6361/202039734

APA

Klioner, S. A., Mignard, F., Lindegren, L., Bastian, U., McMillan, P. J., Hernandez, J., Hobbs, D., Ramos-Lerate, M., Biermann, M., Bombrun, A., de Torres, A., Gerlach, E., Hilger, T., Lammers, U., Steidelmueller, H., Stephenson, C. A., Brown, A. G. A., Vallenari, A., Prusti, T., ... Gaia Collaboration (2021). Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry. Astronomy & Astrophysics, 649, [A9]. https://doi.org/10.1051/0004-6361/202039734

Vancouver

Klioner SA, Mignard F, Lindegren L, Bastian U, McMillan PJ, Hernandez J o.a. Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry. Astronomy & Astrophysics. 2021 apr. 28;649. A9. https://doi.org/10.1051/0004-6361/202039734

Author

Klioner, S. A. ; Mignard, F. ; Lindegren, L. ; Bastian, U. ; McMillan, P. J. ; Hernandez, J. ; Hobbs, D. ; Ramos-Lerate, M. ; Biermann, M. ; Bombrun, A. ; de Torres, A. ; Gerlach, E. ; Hilger, T. ; Lammers, U. ; Steidelmueller, H. ; Stephenson, C. A. ; Brown, A. G. A. ; Vallenari, A. ; Prusti, T. ; de Bruijne, J. H. J. ; Babusiaux, C. ; Creevey, O. L. ; Evans, D. W. ; Eyer, L. ; Hutton, A. ; Jansen, F. ; Jordi, C. ; Luri, X. ; Panem, C. ; Pourbaix, D. ; Randich, S. ; Sartoretti, P. ; Soubiran, C. ; Walton, N. A. ; Arenou, F. ; Bailer-Jones, C. A. L. ; Cropper, M. ; Drimmel, R. ; Katz, D. ; Lattanzi, M. G. ; Fabricius, C. ; Smith, M. ; Anderson, R. I. ; Hauser, M. ; Lindstrom, H. E. P. ; Morris, D. ; Pagani, C. ; Siebert, A. ; Zhao, H. ; Gaia Collaboration. / Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry. I: Astronomy & Astrophysics. 2021 ; Bind 649.

Bibtex

@article{3c2ab8c0cb634809be3513c867dbaf2e,
title = "Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry",
abstract = "Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quality five-parameter astrometric solutions.Aims. The proper motions of QSO-like sources are used to reveal a systematic pattern due to the acceleration of the solar systembarycentre with respect to the rest frame of the Universe. Apart from being an important scientific result by itself, the acceleration measured in this way is a good quality indicator of the Gaia astrometric solution.Methods. Theeffect of the acceleration was obtained as a part of the general expansion of the vector field of proper motions in vector spherical harmonics (VSH). Various versions of the VSH fit and various subsets of the sources were tried and compared to get the most consistent result and a realistic estimate of its uncertainty. Additional tests with the Gaia astrometric solution were used to get a better idea of the possible systematic errors in the estimate.Results. Our best estimate of the acceleration based on Gaia EDR3 is (2.32 +/- 0.16) x 10(-10) m s(-2) (or 7.33 +/- 0.51 km s(-1) Myr-1) towards alpha = 269.1 degrees +/- 5.4 degrees, delta = -31.6 degrees +/- 4.1 degrees, corresponding to a proper motion amplitude of 5.05 +/- 0.35 mu as yr(-1). This is in good agreement with the acceleration expected from current models of the Galactic gravitational potential. We expect that future Gaia data releases will provide estimates of the acceleration with uncertainties substantially below 0.1 mu as yr(-1).",
keywords = "astrometry, proper motions, reference systems, Galaxy, kinematics and dynamics, methods: data analysis, LARGE-MAGELLANIC-CLOUD, PROPER MOTION, VIRGO CLUSTER, MILKY-WAY, MASS, DISTANCE, GALAXY, BAR, PERTURBATION, KINEMATICS",
author = "Klioner, {S. A.} and F. Mignard and L. Lindegren and U. Bastian and McMillan, {P. J.} and J. Hernandez and D. Hobbs and M. Ramos-Lerate and M. Biermann and A. Bombrun and {de Torres}, A. and E. Gerlach and T. Hilger and U. Lammers and H. Steidelmueller and Stephenson, {C. A.} and Brown, {A. G. A.} and A. Vallenari and T. Prusti and {de Bruijne}, {J. H. J.} and C. Babusiaux and Creevey, {O. L.} and Evans, {D. W.} and L. Eyer and A. Hutton and F. Jansen and C. Jordi and X. Luri and C. Panem and D. Pourbaix and S. Randich and P. Sartoretti and C. Soubiran and Walton, {N. A.} and F. Arenou and Bailer-Jones, {C. A. L.} and M. Cropper and R. Drimmel and D. Katz and Lattanzi, {M. G.} and C. Fabricius and M. Smith and Anderson, {R. I.} and M. Hauser and Lindstrom, {H. E. P.} and D. Morris and C. Pagani and A. Siebert and H. Zhao and {Gaia Collaboration}",
year = "2021",
month = apr,
day = "28",
doi = "10.1051/0004-6361/202039734",
language = "English",
volume = "649",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry

AU - Klioner, S. A.

AU - Mignard, F.

AU - Lindegren, L.

AU - Bastian, U.

AU - McMillan, P. J.

AU - Hernandez, J.

AU - Hobbs, D.

AU - Ramos-Lerate, M.

AU - Biermann, M.

AU - Bombrun, A.

AU - de Torres, A.

AU - Gerlach, E.

AU - Hilger, T.

AU - Lammers, U.

AU - Steidelmueller, H.

AU - Stephenson, C. A.

AU - Brown, A. G. A.

AU - Vallenari, A.

AU - Prusti, T.

AU - de Bruijne, J. H. J.

AU - Babusiaux, C.

AU - Creevey, O. L.

AU - Evans, D. W.

AU - Eyer, L.

AU - Hutton, A.

AU - Jansen, F.

AU - Jordi, C.

AU - Luri, X.

AU - Panem, C.

AU - Pourbaix, D.

AU - Randich, S.

AU - Sartoretti, P.

AU - Soubiran, C.

AU - Walton, N. A.

AU - Arenou, F.

AU - Bailer-Jones, C. A. L.

AU - Cropper, M.

AU - Drimmel, R.

AU - Katz, D.

AU - Lattanzi, M. G.

AU - Fabricius, C.

AU - Smith, M.

AU - Anderson, R. I.

AU - Hauser, M.

AU - Lindstrom, H. E. P.

AU - Morris, D.

AU - Pagani, C.

AU - Siebert, A.

AU - Zhao, H.

AU - Gaia Collaboration

PY - 2021/4/28

Y1 - 2021/4/28

N2 - Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quality five-parameter astrometric solutions.Aims. The proper motions of QSO-like sources are used to reveal a systematic pattern due to the acceleration of the solar systembarycentre with respect to the rest frame of the Universe. Apart from being an important scientific result by itself, the acceleration measured in this way is a good quality indicator of the Gaia astrometric solution.Methods. Theeffect of the acceleration was obtained as a part of the general expansion of the vector field of proper motions in vector spherical harmonics (VSH). Various versions of the VSH fit and various subsets of the sources were tried and compared to get the most consistent result and a realistic estimate of its uncertainty. Additional tests with the Gaia astrometric solution were used to get a better idea of the possible systematic errors in the estimate.Results. Our best estimate of the acceleration based on Gaia EDR3 is (2.32 +/- 0.16) x 10(-10) m s(-2) (or 7.33 +/- 0.51 km s(-1) Myr-1) towards alpha = 269.1 degrees +/- 5.4 degrees, delta = -31.6 degrees +/- 4.1 degrees, corresponding to a proper motion amplitude of 5.05 +/- 0.35 mu as yr(-1). This is in good agreement with the acceleration expected from current models of the Galactic gravitational potential. We expect that future Gaia data releases will provide estimates of the acceleration with uncertainties substantially below 0.1 mu as yr(-1).

AB - Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quality five-parameter astrometric solutions.Aims. The proper motions of QSO-like sources are used to reveal a systematic pattern due to the acceleration of the solar systembarycentre with respect to the rest frame of the Universe. Apart from being an important scientific result by itself, the acceleration measured in this way is a good quality indicator of the Gaia astrometric solution.Methods. Theeffect of the acceleration was obtained as a part of the general expansion of the vector field of proper motions in vector spherical harmonics (VSH). Various versions of the VSH fit and various subsets of the sources were tried and compared to get the most consistent result and a realistic estimate of its uncertainty. Additional tests with the Gaia astrometric solution were used to get a better idea of the possible systematic errors in the estimate.Results. Our best estimate of the acceleration based on Gaia EDR3 is (2.32 +/- 0.16) x 10(-10) m s(-2) (or 7.33 +/- 0.51 km s(-1) Myr-1) towards alpha = 269.1 degrees +/- 5.4 degrees, delta = -31.6 degrees +/- 4.1 degrees, corresponding to a proper motion amplitude of 5.05 +/- 0.35 mu as yr(-1). This is in good agreement with the acceleration expected from current models of the Galactic gravitational potential. We expect that future Gaia data releases will provide estimates of the acceleration with uncertainties substantially below 0.1 mu as yr(-1).

KW - astrometry

KW - proper motions

KW - reference systems

KW - Galaxy

KW - kinematics and dynamics

KW - methods: data analysis

KW - LARGE-MAGELLANIC-CLOUD

KW - PROPER MOTION

KW - VIRGO CLUSTER

KW - MILKY-WAY

KW - MASS

KW - DISTANCE

KW - GALAXY

KW - BAR

KW - PERTURBATION

KW - KINEMATICS

U2 - 10.1051/0004-6361/202039734

DO - 10.1051/0004-6361/202039734

M3 - Journal article

VL - 649

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A9

ER -

ID: 270620262