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Gaia Data Release 1 : Open cluster astrometry: Performance, limitations, and future prospects

van Leeuwen, F.; Vallenari, A; Jordi, C; Lindegren, L. LU ; Bastian, U.; Prusti, T.; de Bruijne, J.H.J.; Brown, A. G. A.; Babusiaux, C. and Bailer-Jones, C. A L, et al. (2017) In Astronomy and Astrophysics 601.
Abstract

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... (More)

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 solutions for cluster parameters. Reconstructed mean cluster parallax and proper motion values are generally in very good agreement with earlier Hipparcos-based determination, although the Gaia mean parallax for the Pleiades is a significant exception. We have no current explanation for that discrepancy. Most clusters are observed to extend to nearly 15 pc from the cluster centre, and it will be up to future Gaia releases to establish whether those potential cluster-member stars are still dynamically bound to the clusters. Conclusions. The Gaia DR1 provides the means to examine open clusters far beyond their more easily visible cores, and can provide membership assessments based on proper motions and parallaxes. A combined HR diagram shows the same features as observed before using the Hipparcos data, with clearly increased luminosities for older A and F dwarfs.

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Astrometry, Open clusters and associations: general
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Astronomy and Astrophysics
volume
601
publisher
EDP Sciences
external identifiers
  • scopus:85018580814
  • wos:000402313500019
ISSN
0004-6361
DOI
10.1051/0004-6361/201730552
language
English
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yes
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882e0f7e-ad0d-4919-952d-3c6e359c048f
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2017-05-24 09:27:27
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2018-08-12 04:36:20
@article{882e0f7e-ad0d-4919-952d-3c6e359c048f,
  abstract     = {<p>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 solutions for cluster parameters. Reconstructed mean cluster parallax and proper motion values are generally in very good agreement with earlier Hipparcos-based determination, although the Gaia mean parallax for the Pleiades is a significant exception. We have no current explanation for that discrepancy. Most clusters are observed to extend to nearly 15 pc from the cluster centre, and it will be up to future Gaia releases to establish whether those potential cluster-member stars are still dynamically bound to the clusters. Conclusions. The Gaia DR1 provides the means to examine open clusters far beyond their more easily visible cores, and can provide membership assessments based on proper motions and parallaxes. A combined HR diagram shows the same features as observed before using the Hipparcos data, with clearly increased luminosities for older A and F dwarfs.</p>},
  articleno    = {A19},
  author       = {van Leeuwen, F. and Vallenari, A and Jordi, C and Lindegren, L. and Bastian, U. and Prusti, T. and de Bruijne, J.H.J. and Brown, A. G. A. and Babusiaux, C. and Bailer-Jones, C. A L and Biermann, M. and Evans, W. D. and Eyer, L. and Jansen, F. and Klioner, S. A. and Lammers, U. and Luri, X. and Mignard, F. and Panem, C. and Pourbaix, D. and Randich, S. and Sartoretti, P. and Siddiqui, H. I. and Soubiran, C. and Valette, V. and Walton, N. A. and Aerts, C. and Arenou, F. and Cropper, M. and Drimmel, R. and Høg, E. and Katz, D. and Lattanzi, M. G. and O'Mullane, W. and Grebel, E. K. and Drake-Holland, Angela J. and Huc, C. and Passot, X. and Perryman, MAC and Bramante, L. and Cacciari, C. and Castañeda, J. and Chaoul, L. and Cheek, N. and De Angeli, F. and Fabricius, C and Guerra, Raphael and Hernández, José M. and Jean-Antoine-Piccolo, A. and Masana, E. and Messineo, R. and Mowlavi, N. and Nienartowicz, K. and Ordóñez-Blanco, D. and Panuzzo, P. and Portell, J. and Richards, P. J. and Riello, Marco and Seabroke, G.~M. and Tanga, P. and Thévenin, F. and Torra, J. and Els, S. G. and Gracia-Abril, G. and Comoretto, G. and Garcia-Reinaldos, M. and Lock, T. and Mercier, Eric and Altmann, Daniel M and Andrae, R. and Astraatmadja, T. L. and Bellas-Velidis, I. and Benson, Ken and Berthier, J. and Blomme, R. and Busso, G. and Carry, B. and Cellino, A. and Clementini, G. and Cowell, S. and Creevey, O. and Cuypers, J. and Davidson, M. and de Ridder, J. and Torres, A. and Delchambre, L. and Dell'Oro, A. and Ducourant, C. and Frémat, Y. and García-Torres, M. and Gosset, E. and Halbwachs, J. L. and Hambly, N. C. and Harrison, D. L. and Hauser, M. and Hestroffer, D. and Hodgkin, S. T. and Huckle, H. E. and Hutton, Stephen A. and Jasniewicz, G. and Jordan, S. and Kontizas, M. and Korn, A. J. and Lanzafame, A. C. and Manteiga, M. and Moitinho, A. and Muinonen, K. and Osinde, J. and Pancino, E. and Pauwels, T. and Petit, J. M. and Recio-Blanco, A. and Robin, A. C. and Sarro, L. M. and Siopis, C. and Smith, M. and Smith, Roger Kenneth Whealands and Sozzetti, A. and Thuillot, W. and van Reeven, W. and Viala, Y. and Abbas, U. and Abreu Aramburu, A. and Accart, S. and Aguado, J. J. and Allan, P. M. and Allasia, W. and Altavilla, G. and Álvarez, M. A. and Alves, JD and Anderson, R. I. and Andrei, Alexandre Humberto and Anglada Varela, E. and Antiche, E. and Antoja, T. and Antón, S. and Arcay, B. and Bach, N. and Baker, S. G. and Balaguer-Núñez, L. and Barache, C. and Barata, C. and Barbier, A. and Barblan, F. and Navascués, Barrado Y.D. and Barros, Mauro V. and Barstow, M. A. and Becciani, U. and Bellazzini, M. and Bello García, A. and Belokurov, Vasily and Bendjoya, P. and Berihuete, A. and Bianchi, L and Bienaymé, O. and Billebaud, F. and Blagorodnova, N. and Blanco-Cuaresma, S. and Boch, T. and Bombrun, A. and Borrachero, R. and Bouquillon, S. and Bourda, G. and Bouy, H. and Bragaglia, A. and Breddels, M. A. and Brouillet, N. and Brüsemeister, T. and Bucciarelli, B. and Burgess, P. and Burgon, R. and Burlacu, A. and Busonero, D. and Buzzi, R. and Caffau, E. and Cambras, J. and Campbell, Harry and Cancelliere, R. and Cantat-Gaudin, T. and Carlucci, T. and Carrasco, J. M. and Castellani, M. and Charlot, P. and Charnas, J. and Chiavassa, A. and Clotet, M. and Cocozza, G. and Collins, R. S. and Costigan, G. and Crifo, F. and Cross, N. J G and Crosta, M. and Crowley, Anna Lisa C. and Dafonte, C. and Damerdji, Y. and Dapergolas, A. and David, P. and David, M. and De Cat, P. and De Felice, F. and de Laverny, P. and De Luise, F. and De March, R. and de Martino, D and Souza, R V G and Debosscher, J. and de Cea del Pozo, E. and Delbo, M. and Delgado, A and Delgado, H. E. and De Matteo, R.P. and Diakite, S. and Distefano, E. and Dolding, C. and Dos Anjos, S. and Drazinos, P. and Durán, J. and Dzigan, Y. and Edvardsson, B. and Enke, Harry and Evans, N.W. and Eynard Bontemps, G. and Fabre, C. and Fabrizio, M. and Faigler, S. and Falcão, A. J. and Farràs Casas, M. and Federici, L. and Fedorets, G. and Fernández-Hernández, J. and Fernique, P. and Fienga, A. and Figueras, F and Filippi-Chiela, Eduardo C and Findeisen, K. and Fonti, A. and Fouesneau, M. and Fraile, E. and Fraser, M. A. and Fuchs, J and Gai, M. and Galleti, S. and Galluccio, L. and Garabato, D. and García-Sedano, F. and Garofalo, A. and Garralda, N. and Gavras, P. and Gerssen, J. and Geyer, R. and Gilmore, G. and Girona, S. and Giuffrida, G. and Gomes, Marc E. and González-Marcos, A. and González-Núñez, J. and González-Vidal, J. J. and Granvik, M. and Guerrier, A. and Guillout, P. and Guiraud, J. and Gúrpide, A. and Gutiérrez-Sánchez, R. and Guy, L. P. and Haigron, R. and Hatzidimitriou, D. and Haywood, M. and Heiter, U and Helmi, A and Hobbs, D. and Hofmann, W and Holl, B. and Holland, G. and Hunt, J. A S and Hypki, A. and Icardi, V. and Irwin, M. and Jevardat De Fombelle, G. and Jofré, P. and Jonker, P. G. and Jorissen, A and Julbe, F. and Karampelas, A. and Kochoska, A. and Kohley, R. and Kolenberg, K. and Kontizas, E. and Koposov, S. E. and Kordopatis, G. and Koubsky, P. and Krone-Martins, Alberto and Kudryashova, M. and Kull, I and Bachchan, R. K. and Lacoste-Seris, F. and Lanza, A. F. and Lavigne, J. B. and Le Poncin-Lafitte, C. and Lebreton, Y. and Lebzelter, T. and Leccia, S. and Leclerc, N. and Lecoeur-Taibi, I. and Lemaitre, V and Lenhardt, H. and Leroux, Florence and Liao, S and Licata, E. and Lindstrøm, H. E P and Lister, T Andrew and Livanou, E. and Lobel, A. and Löffler, Winfrid and López, M J and Lorenz, Christian D. and MacDonald, I. and Magalhães Fernandes, T. and Managau, S. and Mann, R. G. and Mantelet, G. and Marchal, O. and Marchant, J. M. and Marconi, Maurizio and Marinoni, S. and Marrese, P. M. and Marschalkó, G. and Marshall, Jan D and Martín-Fleitas, J. and de Martino, Maurizio and Mary, N. and Matijevič, G. and Mazeh, T. and McMillan, P. J. and Messina, S. and Michalik, D. and Millar, N. R. and Miranda, B. M H and Molina, D. and Molinaro, R. J. and Molinaro, M. and Molnár, L. and Moniez, M. and Montegriffo, P. and Mor, R. and Mora, A. and Morbidelli, R. and Morel, T. and Morgenthaler, S. and Morris, D W and Mulone, A. F. and Muraveva, T. and Musella, I. and Narbonne, J. and Nelemans, G. and Nicastro, L. and Noval, L. and Ordénovic, C. and Ordieres-Meré, J. and Osborne, J. P. and Pagani, C. and Pagano, I. and Pailler, F. and Palacin, H. and Palaversa, L. and Parsons, P and Pecoraro, M. and Pedrosa, R. and Pentikäinen, H. and Pichon, B. and Piersimoni, A. M. and Pineau, F. X. and Plachy, E. and Plum, G. and Poujoulet, E. and Prša, A. and Pulone, L. and Ragaini, S. and Rago, S. and Rambaux, Nicolas and Ramos-Lerate, M. and Ranalli, P. and Rauw, G. and Read, A and Regibo, S. and Reylé, C. and Ribeiro, R. A. and Rimoldini, L. and Ripepi, V. and Riva, A. and Rixon, G. and Roelens, M. and Romero-Gómez, M. and Rowell, N. and Royer, F. and Ruiz-Dern, L. and Sadowski, G. and Sagristà Sellés, T. and Sahlmann, J. and Salgado, Antonio J. and Salguero, E. and Sarasso, M. and Savietto, H. and Schultheis, M. and Sciacca, E. and Segol, M. and Segovia, J. C. and Segransan, Damien and Shih, I. C. and Smareglia, R. and Smart, R. L. and Solano, E. and Solitro, F. and Sordo, R. and Soria Nieto, S. and Souchay, J. and Spagna, A. and Spoto, F. and Stampa, U. and Steele, I. A. and Steidelmüller, H. and Stephenson, C. A. and Stoev, H. and Suess, F. F. and Süveges, M. and Surdej, J. and Szabados, L. and Szegedi-Elek, E. and Tapiador, D. and Taris, F. and Tauran, G. and Taylor, M. B. and Teixeira, Manuel R and Terrett, D. and Tingley, B. and Trager, Scott C. and Turon, C. and Ulla, A. and Utrilla, E. and Valentini, G. and Van Elteren, A. and Van Hemelryck, E. and Vanleeuwen, M. and Varadi, M. and Vecchiato, A. and Veljanoski, J. and Via, T. and de Vicente, J. P. and Vogt, S. and Voss, H and Votruba, V. and Voutsinas, S. and Walmsley, G. and Weiler, M. and Weingrill, K. and Wevers, T. and Wyrzykowski, A. and Kupcu-Yoldas, A. and Zerjal, M. and Zucker, S. and Zurbach, C. and Zwitter, T. and Alecu, A. and Allen, M and Allende Prieto, C. and Amorim, A and Anglada-Escudé, G. and Arsenijevic, Valentain S. Arsic and Azaz, S. and Balm, P. and Beck, M. and Bernstein, Henry H. and Bigot, L. and Bijaoui, A. and Blasco, C. and Bonfigli, M. and Bono, Giuseppe and Boudreault, S. and Bressan, A. and Brown, S. D. and Brunet, P. M. and Bunclark, P. and Buonanno, R. and Butkevich, A. G. and Carret, Celine and Carrion-Petersen, Mary Lou and Chemin, L. and Chéreau, F. and Corcione, L. and Darmigny, E. and de Boer, K. S. and De Teodoro, P. and de Zeeuw, P. T. and Delle Luche, C. and Domingues, C. D. and Dubath, P. and Fodor, F. and Frézouls, B. and Fries, A. and Fustes, D. and Fyfe, D. and Gallardo, Enrique and Gallegos, J. and Gardiol, D. and Gebran, M. and Gomboc, A. and Gómez, Antonio and Grux, E. and Gueguen, A. and Heyrovsky, A. and Hoar, J. and Iannicola, G. and Isasi Parache, Y. and Janotto, A. M. and Joliet, E. and Jonckheere, A. and Keil, R and Kim, D-W and Klagyivik, P. and Klar, Joakim and Knude, J and Kochukhov, O. and Kolka, I and Kos, J and Kutka, A. and Lainey, V. and LeBouquin, D. and Liu, C. and Loreggia, D. and Makarov, Danil V and Marseille, M. G. and Martayan, C. and Martinez-Rubi, O. and Massart, B. and Meynadier, Frédéric and Mignot, S. and Munari, U and Nguyen, A. T. and Nordlander, T. and O'Flaherty, K. S. and Ocvirk, P. and Olias Sanz, A. and Ortiz, Ana P. and Osorio, J and Oszkiewicz, D. and Ouzounis, Christos A. and Palmer, M and Park Dahlgaard, Su Mi and Pasquato, E. and Peltzer, C. and Peralta, J. and Péturaud, F. and Pieniluoma, T. and Pigozzi, E. and Poels, J. and Prat, G. and Prod'homme, T. and Raison, F. and Rebordao, J. M. and Risquez, D. and Rocca-Volmerange, B. and Rosen, S. and Ruiz-Fuertes, M. I. and Russo, F. and Sembay, S. and Serraller Vizcaino, I. and Short, Kevin A. and Siebert, A. and Tedesco-Silva, H and Sinachopoulos, D. and Slezak, E. and Soffel, M. and Sosnowska, D. and StraiÅ Ys, V. and Ter Linden, M. and Terrell, D. and Theil, S. and Tiede, C. and Troisi, L. and Tsalmantza, P. and Tur, D. and Vaccari, M. and Vachier, F. and Valles, P. and Van Hamme, Walter and Veltz, L. and Virtanen, Jyrki and Wallut, J. M. and Wichmann, R. and Wilkinson, M. I. and Ziaeepour, H. and Zschocke, S.},
  issn         = {0004-6361},
  keyword      = {Astrometry,Open clusters and associations: general},
  language     = {eng},
  month        = {05},
  publisher    = {EDP Sciences},
  series       = {Astronomy and Astrophysics},
  title        = {Gaia Data Release 1 : Open cluster astrometry: Performance, limitations, and future prospects},
  url          = {http://dx.doi.org/10.1051/0004-6361/201730552},
  volume       = {601},
  year         = {2017},
}