Gaia Early Data Release 3 Summary of the contents and survey properties

Επιστημονική δημοσίευση - Άρθρο Περιοδικού uoadl:3196272 77 Αναγνώσεις

Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
Gaia Early Data Release 3 Summary of the contents and survey properties
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Context. We present the early installment of the third Gaia data
release, Gaia EDR3, consisting of astrometry and photometry for 1.8
billion sources brighter than magnitude 21, complemented with the list
of radial velocities from Gaia DR2.
Aims. A summary of the contents of Gaia EDR3 is presented, accompanied
by a discussion on the differences with respect to Gaia DR2 and an
overview of the main limitations which are present in the survey.
Recommendations are made on the responsible use of Gaia EDR3 results.
Methods. The raw data collected with the Gaia instruments during the
first 34 months of the mission have been processed by the Gaia Data
Processing and Analysis Consortium and turned into this early third data
release, which represents a major advance with respect to Gaia DR2 in
terms of astrometric and photometric precision, accuracy, and
homogeneity. Results. Gaia EDR3 contains celestial positions and the
apparent brightness in G for approximately 1.8 billion sources. For 1.5
billion of those sources, parallaxes, proper motions, and the (G(BP) -
G(RP)) colour are also available. The passbands for G, G(BP), and G(RP)
are provided as part of the release. For ease of use, the 7 million
radial velocities from Gaia DR2 are included in this release, after the
removal of a small number of spurious values. New radial velocities will
appear as part of Gaia DR3. Finally, Gaia EDR3 represents an updated
materialisation of the celestial reference frame (CRF) in the optical,
the Gaia-CRF3, which is based solely on extragalactic sources. The
creation of the source list for Gaia EDR3 includes enhancements that
make it more robust with respect to high proper motion stars, and the
disturbing effects of spurious and partially resolved sources. The
source list is largely the same as that for Gaia DR2, but it does
feature new sources and there are some notable changes. The source list
will not change for Gaia DR3.
Conclusions. Gaia EDR3 represents a significant advance over Gaia DR2,
with parallax precisions increased by 30 per cent, proper motion
precisions increased by a factor of 2, and the systematic errors in the
astrometry suppressed by 30-40% for the parallaxes and by a factor
similar to 2.5 for the proper motions. The photometry also features
increased precision, but above all much better homogeneity across
colour, magnitude, and celestial position. A single passband for G,
G(BP), and G(RP) is valid over the entire magnitude and colour range,
with no systematics above the 1% level
Έτος δημοσίευσης:
2021
Συγγραφείς:
Brown, A. G. A.
Vallenari, A.
Prusti, T.
de Bruijne, J. H.
J.
Babusiaux, C.
Biermann, M.
Creevey, O. L.
Evans, D.
W.
Eyer, L.
Hutton, A.
Jansen, F.
Jordi, C.
Klioner,
S. A.
Lammers, U.
Lindegren, L.
Luri, X.
Mignard, F. and
Panem, C.
Pourbaix, D.
Randich, S.
Sartoretti, P. and
Soubiran, C.
Walton, N. A.
Arenou, F.
Bailer-Jones, C. A. L.
and Bastian, U.
Cropper, M.
Drimmel, R.
Katz, D. and
Lattanzi, M. G.
van Leeuwen, F.
Bakker, J.
Cacciari, C. and
Castaneda, J.
De Angeli, F.
Ducourant, C.
Fabricius, C. and
Fouesneau, M.
Fremat, Y.
Guerra, R.
Guerrier, A. and
Guiraud, J.
Jean-Antoine Piccolo, A.
Masana, E.
Messineo, R.
and Mowlavi, N.
Nicolas, C.
Nienartowicz, K.
Pailler, F. and
Panuzzo, P.
Riclet, F.
Roux, W.
Seabroke, G. M.
Sordo,
R.
Tanga, P.
Thevenin, F.
Gracia-Abril, G.
Portell, J.
and Teyssier, D.
Altmann, M.
Andrae, R.
Bellas-Velidis, I.
and Benson, K.
Berthier, J.
Blomme, R.
Brugaletta, E. and
Burgess, P. W.
Busso, G.
Carry, B.
Cellino, A.
Cheek, N.
and Clementini, G.
Damerdji, Y.
Davidson, M.
Delchambre, L.
and Dell'Oro, A.
Fernandez-Hernandez, J.
Galluccio, L. and
Garcia-Lario, P.
Garcia-Reinaldos, M.
Gonzalez-Nunez, J. and
Gosset, E.
Haigron, R.
Halbwachs, J. -L.
Hambly, N. C. and
Harrison, D. L.
Hatzidimitriou, D.
Heiter, U.
Hernandez, J.
and Hestroffer, D.
Hodgkin, S. T.
Holl, B.
Janssen, K. and
Jevardat de Fombelle, G.
Jordan, S.
Krone-Martins, A. and
Lanzafame, A. C.
Loeffler, W.
Lorca, A.
Manteiga, M. and
Marchal, O.
Marrese, P. M.
Moitinho, A.
Mora, A. and
Muinonen, K.
Osborne, P.
Pancino, E.
Pauwels, T.
Petit,
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Recio-Blanco, A.
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Busonero, D.
Butkevich, A. G.
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Caffau, E. and
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Canovas, H.
Cantat-Gaudin, T.
Carballo, R.
and Carlucci, T.
Carnerero, I, M.
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Castro-Ginard, A.
Castro
Sampol, P.
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Managau, S.
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Marinoni, S.
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Martin Polo, L. and
Martin-Fleitas, J. M.
Masip, A.
Massari, D. and
Mastrobuono-Battisti, A.
Mazeh, T.
McMillan, P. J.
Messina,
S.
Michalik, D.
Millar, N. R.
Mints, A.
Molina, D. and
Molinaro, R.
Molnar, L.
Montegriffo, P.
Mor, R. and
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Morel, T.
Morris, D.
Mulone, A. F.
Munoz,
D.
Muraveva, T.
Murphy, C. P.
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Noval, L. and
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Pineau,
F. -X.
Plachy, E.
Plum, G.
Poggio, E.
Poretti, E. and
Poujoulet, E.
Prsa, A.
Pulone, L.
Racero, E.
Ragaini, S.
and Rainer, M.
Raiteri, C. M.
Rambaux, N.
Ramos, P. and
Ramos-Lerate, M.
Re Fiorentin, P.
Regibo, S.
Reyle, C. and
Ripepi, V.
Riva, A.
Rixon, G.
Robichon, N.
Robin, C. and
Roelens, M.
Rohrbasser, L.
Romero-Gomez, M.
Rowell, N. and
Royer, F.
Rybicki, K. A.
Sadowski, G.
Sagrista Selles, A.
and Sahlmann, J.
Salgado, J.
Salguero, E.
Samaras, N. and
Sanchez Gimenez, V.
Sanna, N.
Santovena, R.
Sarasso, M. and
Schultheis, M.
Sciacca, E.
Segol, M.
Segovia, J. C. and
Segransan, D.
Semeux, D.
Shahaf, S.
Siddiqui, H. I. and
Siebert, A.
Siltala, L.
Slezak, E.
Smart, R. L.
Solano,
E.
Solitro, F.
Souami, D.
Souchay, J.
Spagna, A. and
Spoto, F.
Steele, I. A.
Steidelmueller, H.
Stephenson, C. A.
and Suveges, M.
Szabados, L.
Szegedi-Elek, E.
Taris, F. and
Tauran, G.
Taylor, M. B.
Teixeira, R.
Thuillot, W. and
Tonello, N.
Torra, F.
Torra, J.
Turon, C.
Unger, N. and
Vaillant, M.
van Dillen, E.
Vanel, O.
Vecchiato, A. and
Viala, Y.
Vicente, D.
Voutsinas, S.
Weiler, M.
Wevers,
T.
Wyrzykowski, L.
Yoldas, A.
Yvard, P.
Zhao, H. and
Zorec, J.
Zucker, S.
Zurbach, C.
Zwitter, T.
Gaia
Collaboration
Περιοδικό:
Chinese Astronomy and Astrophysics
Εκδότης:
EDP SCIENCES S A
Τόμος:
649
Λέξεις-κλειδιά:
catalogs; astrometry; parallaxes; proper motions; techniques;
photometric; techniques: radial velocities
Επίσημο URL (Εκδότης):
DOI:
10.1051/0004-6361/202039657
Το ψηφιακό υλικό του τεκμηρίου δεν είναι διαθέσιμο.