Authors
Floor Van Leeuwen, Antonella Vallenari, C Jordi, L Lindegren, U Bastian, T Prusti, JHJ De Bruijne, AGA Brown, C Babusiaux, CAL Bailer-Jones, M Biermann, DW Evans, L Eyer, F Jansen, SA Klioner, U Lammers, X Luri, F Mignard, C Panem, D Pourbaix, S Randich, P Sartoretti, HI Siddiqui, C Soubiran, V Valette, NA Walton, C Aerts, F Arenou, M Cropper, R Drimmel, E Høg, D Katz, MG Lattanzi, W O’mullane, EK Grebel, AD Holland, C Huc, X Passot, M Perryman, L Bramante, C Cacciari, J Castañeda, L Chaoul, N Cheek, F De Angeli, C Fabricius, Raphael Guerra, J Hernández, A Jean-Antoine-Piccolo, E Masana, R Messineo, N Mowlavi, K Nienartowicz, D Ordóñez-Blanco, P Panuzzo, J Portell, PJ Richards, Marco Riello, GM Seabroke, P Tanga, F Thévenin, J Torra, SG Els, G Gracia-Abril, G Comoretto, M Garcia-Reinaldos, T Lock, E Mercier, M Altmann, R Andrae, TL Astraatmadja, I Bellas-Velidis, K Benson, J Berthier, R Blomme, G Busso, B Carry, A Cellino, G Clementini, S Cowell, O Creevey, J Cuypers, M Davidson, J De Ridder, A De Torres, Ludovic Delchambre, A Dell’Oro, C Ducourant, Y Frémat, M García-Torres, Eric Gosset, J-L Halbwachs, NC Hambly, DL Harrison, M Hauser, D Hestroffer, ST Hodgkin, HE Huckle, A Hutton, Gérard Jasniewicz, S Jordan, M Kontizas, AJ Korn, AC Lanzafame, M Manteiga, A Moitinho, K Muinonen, J Osinde, E Pancino, T Pauwels, J-M Petit, A Recio-Blanco, AC Robin, LM Sarro, C Siopis, M Smith, KW Smith, A Sozzetti, W Thuillot, W Van Reeven, Y Viala, U Abbas, A Abreu Aramburu, S Accart, JJ Aguado, PM Allan, W Allasia, G Altavilla, MA Álvarez, J Alves, RI Anderson, AH Andrei, E Anglada Varela, E Antiche, T Antoja, S Antón, B Arcay, N Bach, SG Baker, L Balaguer-Núñez, C Barache, C Barata, A Barbier, F Barblan, D Barrado y Navascués, M Barros, MA Barstow, U Becciani, M Bellazzini, A Bello García
Publication date
2017/5/1
Journal
Astronomy & astrophysics
Volume
601
Pages
A19
Publisher
EDP sciences
Description
Context
The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS). This is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using Hipparcos and Tycho-2 positions in 1991.25 as prior information.
Aims
We investigate the scientific potential and limitations of the TGAS component by means of the astrometric data for open clusters.
Methods
Mean cluster parallax and proper motion values are derived taking into account the error correlations within the astrometric solutions for individual stars, an estimate of the internal velocity dispersion in the cluster, and, where relevant, the effects of the depth of the cluster along the line of sight. Internal consistency of the TGAS data is assessed.
Results
Values given for standard uncertainties are still inaccurate and may lead to unrealistic unit-weight standard deviations of least squares …
Scholar articles
F Van Leeuwen, A Vallenari, C Jordi, L Lindegren… - Astronomy & astrophysics, 2017