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23 results on '"Nordlander, T"'

3. The Gaia-ESO survey: Mapping the shape and evolution of the radial abundance gradients with open clusters

Author

Magrini, L., primary, Viscasillas Vázquez, C., additional, Spina, L., additional, Randich, S., additional, Romano, D., additional, Franciosini, E., additional, Recio-Blanco, A., additional, Nordlander, T., additional, D’Orazi, V., additional, Baratella, M., additional, Smiljanic, R., additional, Dantas, M. L. L., additional, Pasquini, L., additional, Spitoni, E., additional, Casali, G., additional, Van der Swaelmen, M., additional, Bensby, T., additional, Stonkute, E., additional, Feltzing, S., additional, Sacco, G. G., additional, Bragaglia, A., additional, Pancino, E., additional, Heiter, U., additional, Biazzo, K., additional, Gilmore, G., additional, Bergemann, M., additional, Tautvaišienė, G., additional, Worley, C., additional, Hourihane, A., additional, Gonneau, A., additional, and Morbidelli, L., additional

Published
2023
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13. A test field forGaia

Author

Frémat, Y., primary, Altmann, M., additional, Pancino, E., additional, Soubiran, C., additional, Jofré, P., additional, Damerdji, Y., additional, Heiter, U., additional, Royer, F., additional, Seabroke, G., additional, Sordo, R., additional, Blanco-Cuaresma, S., additional, Jasniewicz, G., additional, Martayan, C., additional, Thévenin, F., additional, Vallenari, A., additional, Blomme, R., additional, David, M., additional, Gosset, E., additional, Katz, D., additional, Viala, Y., additional, Boudreault, S., additional, Cantat-Gaudin, T., additional, Lobel, A., additional, Meisenheimer, K., additional, Nordlander, T., additional, Raskin, G., additional, Royer, P., additional, and Zorec, J., additional

Published
2016
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14. TheGaia-ESO Survey: Sodium and aluminium abundances in giants and dwarfs

Author

Smiljanic, R., primary, Romano, D., additional, Bragaglia, A., additional, Donati, P., additional, Magrini, L., additional, Friel, E., additional, Jacobson, H., additional, Randich, S., additional, Ventura, P., additional, Lind, K., additional, Bergemann, M., additional, Nordlander, T., additional, Morel, T., additional, Pancino, E., additional, Tautvaišien*error*ė, G., additional, Adibekyan, V., additional, Tosi, M., additional, Vallenari, A., additional, Gilmore, G., additional, Bensby, T., additional, François, P., additional, Koposov, S., additional, Lanzafame, A. C., additional, Recio-Blanco, A., additional, Bayo, A., additional, Carraro, G., additional, Casey, A. R., additional, Costado, M. T., additional, Franciosini, E., additional, Heiter, U., additional, Hill, V., additional, Hourihane, A., additional, Jofré, P., additional, Lardo, C., additional, de Laverny, P., additional, Lewis, J., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G. G., additional, Sbordone, L., additional, Sousa, S. G., additional, Worley, C. C., additional, and Zaggia, S., additional

Published
2016
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15. GaiaFGK benchmark stars: abundances ofαand iron-peak elements

Author

Jofré, P., primary, Heiter, U., additional, Soubiran, C., additional, Blanco-Cuaresma, S., additional, Masseron, T., additional, Nordlander, T., additional, Chemin, L., additional, Worley, C. C., additional, Van Eck, S., additional, Hourihane, A., additional, Gilmore, G., additional, Adibekyan, V., additional, Bergemann, M., additional, Cantat-Gaudin, T., additional, Delgado-Mena, E., additional, González Hernández, J. I., additional, Guiglion, G., additional, Lardo, C., additional, de Laverny, P., additional, Lind, K., additional, Magrini, L., additional, Mikolaitis, S., additional, Montes, D., additional, Pancino, E., additional, Recio-Blanco, A., additional, Sordo, R., additional, Sousa, S., additional, Tabernero, H. M., additional, and Vallenari, A., additional

Published
2015
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16. TheGaia-ESO Survey: A globular cluster escapee in the Galactic halo

Author

Lind, K., primary, Koposov, S. E., additional, Battistini, C., additional, Marino, A. F., additional, Ruchti, G., additional, Serenelli, A., additional, Worley, C. C., additional, Alves-Brito, A., additional, Asplund, M., additional, Barklem, P. S., additional, Bensby, T., additional, Bergemann, M., additional, Blanco-Cuaresma, S., additional, Bragaglia, A., additional, Edvardsson, B., additional, Feltzing, S., additional, Gruyters, P., additional, Heiter, U., additional, Jofre, P., additional, Korn, A. J., additional, Nordlander, T., additional, Ryde, N., additional, Soubiran, C., additional, Gilmore, G., additional, Randich, S., additional, Ferguson, A. M. N., additional, Jeffries, R. D., additional, Vallenari, A., additional, Allende Prieto, C., additional, Pancino, E., additional, Recio-Blanco, A., additional, Romano, D., additional, Smiljanic, R., additional, Bellazzini, M., additional, Damiani, F., additional, Hill, V., additional, de Laverny, P., additional, Jackson, R. J., additional, Lardo, C., additional, and Zaggia, S., additional

Published
2015
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17. Gaia FGK benchmark stars: abundances of alpha and iron-peak elements

Author

Jofré P., Heiter U., Soubiran C., Blanco-Cuaresma S., Masseron T., Nordlander T., Chemin L., Worley C. C., Van Eck S., Hourihane A., Gilmore G., Adibekyan V., Bergemann M., Cantat-Gaudin T., Delgado-Mena E., González Hernández J. I., Guiglion G., Lardo C., de Laverny P., Lind K., Magrini L., Mikolaitis S., Montes D., and Pancino E.

Subjects
Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

In the current era of large spectroscopic surveys of the Milky Way reference stars for calibrating astrophysical parameters and chemical abundances are of paramount importance. We determine elemental abundances of Mg Si Ca Sc Ti V Cr Mn Co and Ni for our predefined set of Gaia FGK benchmark stars. By analysing high resolution and high signal to noise spectra taken from several archive datasets we combined results of eight different methods to determine abundances on a line by line basis. We perform a detailed homogeneous analysis of the systematic uncertainties such as differential versus absolute abundance analysis as well as we assess errors due to NLTE and the stellar parameters in our final abundances. Our results are provided by listing final abundances and the different sources of uncertainties as well as line by line and method by method abundances. The Gaia FGK benchmark stars atmospheric parameters are already being widely used for calibration of several pipelines applied to different surveys. With the added reference abundances of 10 elements this set is very suitable to calibrate the chemical abundances obtained by these pipelines.

Published
2015

18. TheGaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars

Author

Smiljanic, R., primary, Korn, A. J., additional, Bergemann, M., additional, Frasca, A., additional, Magrini, L., additional, Masseron, T., additional, Pancino, E., additional, Ruchti, G., additional, San Roman, I., additional, Sbordone, L., additional, Sousa, S. G., additional, Tabernero, H., additional, Tautvaišienė, G., additional, Valentini, M., additional, Weber, M., additional, Worley, C. C., additional, Adibekyan, V. Zh., additional, Allende Prieto, C., additional, Barisevičius, G., additional, Biazzo, K., additional, Blanco-Cuaresma, S., additional, Bonifacio, P., additional, Bragaglia, A., additional, Caffau, E., additional, Cantat-Gaudin, T., additional, Chorniy, Y., additional, de Laverny, P., additional, Delgado-Mena, E., additional, Donati, P., additional, Duffau, S., additional, Franciosini, E., additional, Friel, E., additional, Geisler, D., additional, González Hernández, J. I., additional, Gruyters, P., additional, Guiglion, G., additional, Hansen, C. J., additional, Heiter, U., additional, Hill, V., additional, Jacobson, H. R., additional, Jofre, P., additional, Jönsson, H., additional, Lanzafame, A. C., additional, Lardo, C., additional, Ludwig, H.-G., additional, Maiorca, E., additional, Mikolaitis, Š., additional, Montes, D., additional, Morel, T., additional, Mucciarelli, A., additional, Muñoz, C., additional, Nordlander, T., additional, Pasquini, L., additional, Puzeras, E., additional, Recio-Blanco, A., additional, Ryde, N., additional, Sacco, G., additional, Santos, N. C., additional, Serenelli, A. M., additional, Sordo, R., additional, Soubiran, C., additional, Spina, L., additional, Steffen, M., additional, Vallenari, A., additional, Van Eck, S., additional, Villanova, S., additional, Gilmore, G., additional, Randich, S., additional, Asplund, M., additional, Binney, J., additional, Drew, J., additional, Feltzing, S., additional, Ferguson, A., additional, Jeffries, R., additional, Micela, G., additional, Negueruela, I., additional, Prusti, T., additional, Rix, H-W., additional, Alfaro, E., additional, Babusiaux, C., additional, Bensby, T., additional, Blomme, R., additional, Flaccomio, E., additional, François, P., additional, Irwin, M., additional, Koposov, S., additional, Walton, N., additional, Bayo, A., additional, Carraro, G., additional, Costado, M. T., additional, Damiani, F., additional, Edvardsson, B., additional, Hourihane, A., additional, Jackson, R., additional, Lewis, J., additional, Lind, K., additional, Marconi, G., additional, Martayan, C., additional, Monaco, L., additional, Morbidelli, L., additional, Prisinzano, L., additional, and Zaggia, S., additional

Published
2014
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19. TheGaia-ESO Survey: radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk

Author

Bergemann, M., primary, Ruchti, G. R., additional, Serenelli, A., additional, Feltzing, S., additional, Alves-Brito, A., additional, Asplund, M., additional, Bensby, T., additional, Gruiters, P., additional, Heiter, U., additional, Hourihane, A., additional, Korn, A., additional, Lind, K., additional, Marino, A., additional, Jofre, P., additional, Nordlander, T., additional, Ryde, N., additional, Worley, C. C., additional, Gilmore, G., additional, Randich, S., additional, Ferguson, A. M. N., additional, Jeffries, R. D., additional, Micela, G., additional, Negueruela, I., additional, Prusti, T., additional, Rix, H.-W., additional, Vallenari, A., additional, Alfaro, E. J., additional, Allende Prieto, C., additional, Bragaglia, A., additional, Koposov, S. E., additional, Lanzafame, A. C., additional, Pancino, E., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Walton, N., additional, Costado, M. T., additional, Franciosini, E., additional, Hill, V., additional, Lardo, C., additional, de Laverny, P., additional, Magrini, L., additional, Maiorca, E., additional, Masseron, T., additional, Morbidelli, L., additional, Sacco, G., additional, Kordopatis, G., additional, and Tautvaišienė, G., additional

Published
2014
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20. GaiaFGK benchmark stars: Metallicity

Author

Jofré, P., primary, Heiter, U., additional, Soubiran, C., additional, Blanco-Cuaresma, S., additional, Worley, C. C., additional, Pancino, E., additional, Cantat-Gaudin, T., additional, Magrini, L., additional, Bergemann, M., additional, González Hernández, J. I., additional, Hill, V., additional, Lardo, C., additional, de Laverny, P., additional, Lind, K., additional, Masseron, T., additional, Montes, D., additional, Mucciarelli, A., additional, Nordlander, T., additional, Recio Blanco, A., additional, Sobeck, J., additional, Sordo, R., additional, Sousa, S. G., additional, Tabernero, H., additional, Vallenari, A., additional, and Van Eck, S., additional

Published
2014
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22. Gaia Data Release 1

Author

Brown, A. G. A., Vallenari, A., Prusti, T., de Bruijne, J. H.J., Mignard, F., Drimmel, R., Babusiaux, C., Bailer-Jones, C. A.L., Bastian, U., Biermann, M., Evans, D. W., Eyer, L., Jansen, F., Jordi, C., Katz, D., Klioner, S. A., Lammers, U., Lindegren, L., Luri, X., O’Mullane, W., Panem, C., Pourbaix, D., Randich, S., Sartoretti, P., Siddiqui, H. I., Soubiran, C., Valette, V., van Leeuwen, F., Walton, N. A., Aerts, C., Arenou, F., Cropper, M., Høg, E., Lattanzi, M. G., Grebel, E. K., Holland, A. D., Huc, C., Passot, X., Perryman, M., Bramante, L., Cacciari, C., Castañeda, J., Chaoul, L., Cheek, N., De Angeli, F., Fabricius, C., Guerra, R., Hernández, J., Jean-Antoine-Piccolo, A., Masana, E., Messineo, R., Mowlavi, N., Nienartowicz, K., Ordóñez-Blanco, D., Panuzzo, P., Portell, J., Richards, P. J., Riello, M., Seabroke, G. M., Tanga, P., Thévenin, F., Torra, J., Els, S. G., Gracia-Abril, G., Comoretto, G., Garcia-Reinaldos, M., Lock, T., Mercier, E., Altmann, M., Andrae, R., Astraatmadja, T. L., Bellas-Velidis, I., Benson, K., Berthier, J., Blomme, R., Busso, G., Carry, B., Cellino, A., Clementini, G., Cowell, S., Creevey, O., Cuypers, J., Davidson, M., De Ridder, J., de Torres, A., Delchambre, L., Dell’Oro, A., Ducourant, C., Frémat, Y., García-Torres, M., Gosset, E., Halbwachs, J.-L., Hambly, N. C., Harrison, D. L., Hauser, M., Hestroffer, D., Hodgkin, S. T., Huckle, H. E., Hutton, A., Jasniewicz, G., Jordan, S., Kontizas, M., Korn, A. J., Lanzafame, A. C., Manteiga, M., Moitinho, A., Muinonen, K., Osinde, J., Pancino, E., Pauwels, T., Petit, J.-M., Recio-Blanco, A., Robin, A. C., Sarro, L. M., Siopis, C., Smith, M., Smith, K. W., Sozzetti, A., Thuillot, W., van Reeven, W., Viala, Y., Abbas, U., Abreu Aramburu, A., Accart, S., Aguado, J. J., Allan, P. M., Allasia, W., Altavilla, G., Álvarez, M. A., Alves, J., Anderson, R. I., Andrei, A. H., Anglada Varela, E., Antiche, E., Antoja, T., Antón, S., Arcay, B., Bach, N., Baker, S. G., Balaguer-Núñez, L., Barache, C., Barata, C., Barbier, A., Barblan, F., Barrado y Navascués, D., Barros, M., Barstow, M. A., Becciani, U., Bellazzini, M., Bello García, A., Belokurov, V., Bendjoya, P., Berihuete, A., Bianchi, L., Bienaymé, O., Billebaud, F., Blagorodnova, N., Blanco-Cuaresma, S., Boch, T., Bombrun, A., Borrachero, R., Bouquillon, S., Bourda, G., Bouy, H., Bragaglia, A., Breddels, M. A., Brouillet, N., Brüsemeister, T., Bucciarelli, B., Burgess, P., Burgon, R., Burlacu, A., Busonero, D., Buzzi, R., Caffau, E., Cambras, J., Campbell, H., Cancelliere, R., Cantat-Gaudin, T., Carlucci, T., Carrasco, J. M., Castellani, M., Charlot, P., Charnas, J., Chiavassa, A., Clotet, M., Cocozza, G., Collins, R. S., Costigan, G., Crifo, F., Cross, N. J.G., Crosta, M., Crowley, C., Dafonte, C., Damerdji, Y., Dapergolas, A., David, P., David, M., De Cat, P., de Felice, F., de Laverny, P., De Luise, F., De March, R., de Martino, D., de Souza, R., Debosscher, J., del Pozo, E., Delbo, M., Delgado, A., Delgado, H. E., Di Matteo, P., Diakite, S., Distefano, E., Dolding, C., Dos Anjos, S., Drazinos, P., Duran, J., Dzigan, Y., Edvardsson, B., Enke, H., Evans, N. W., Eynard Bontemps, G., Fabre, C., Fabrizio, M., Faigler, S., Falcão, A. J., Farràs Casas, M., Federici, L., Fedorets, G., Fernández-Hernández, J., Fernique, P., Fienga, A., Figueras, F., Filippi, F., Findeisen, K., Fonti, A., Fouesneau, M., Fraile, E., Fraser, M., Fuchs, J., Gai, M., Galleti, S., Galluccio, L., Garabato, D., García-Sedano, F., Garofalo, A., Garralda, N., Gavras, P., Gerssen, J., Geyer, R., Gilmore, G., Girona, S., Giuffrida, G., Gomes, M., González-Marcos, A., González-Núñez, J., González-Vidal, J. J., Granvik, M., Guerrier, A., Guillout, P., Guiraud, J., Gúrpide, A., Gutiérrez-Sánchez, R., Guy, L. P., Haigron, R., Hatzidimitriou, D., Haywood, M., Heiter, U., Helmi, A., Hobbs, D., Hofmann, W., Holl, B., Holland, G., Hunt, J. A.S., Hypki, A., Icardi, V., Irwin, M., Jevardat de Fombelle, G., Jofré, P., Jonker, P. G., Jorissen, A., Julbe, F., Karampelas, A., Kochoska, A., Kohley, R., Kolenberg, K., Kontizas, E., Koposov, S. E., Kordopatis, G., Koubsky, P., Krone-Martins, A., Kudryashova, M., Kull, I., Bachchan, R. K., Lacoste-Seris, F., Lanza, A. F., Lavigne, J.-B., Le Poncin-Lafitte, C., Lebreton, Y., Lebzelter, T., Leccia, S., Leclerc, N., Lecoeur-Taibi, I., Lemaitre, V., Lenhardt, H., Leroux, F., Liao, S., Licata, E., Lindstrøm, H. E.P., Lister, T. A., Livanou, E., Lobel, A., Löffler, W., López, M., Lorenz, D., MacDonald, I., Magalhães Fernandes, T., Managau, S., Mann, R. G., Mantelet, G., Marchal, O., Marchant, J. M., Marconi, M., Marinoni, S., Marrese, P. M., Marschalkó, G., Marshall, D. J., Martín-Fleitas, J. M., Martino, M., Mary, N., Matijevič, G., Mazeh, T., McMillan, P. J., Messina, S., Michalik, D., Millar, N. R., Miranda, B. M. H., Molina, D., Molinaro, R., Molinaro, M., Molnár, L., Moniez, M., Montegriffo, P., Mor, R., Mora, A., Morbidelli, R., Morel, T., Morgenthaler, S., Morris, D., Mulone, A. F., Muraveva, T., Musella, I., Narbonne, J., Nelemans, G., Nicastro, L., Noval, L., Ordénovic, C., Ordieres-Meré, J., Osborne, P., Pagani, C., Pagano, I., Pailler, F., Palacin, H., Palaversa, L., Parsons, P., Pecoraro, M., Pedrosa, R., Pentikäinen, H., Pichon, B., Piersimoni, A. M., Pineau, F.-X., Plachy, E., Plum, G., Poujoulet, E., Prša, A., Pulone, L., Ragaini, S., Rago, S., Rambaux, N., Ramos-Lerate, M., Ranalli, P., Rauw, G., Read, A., Regibo, S., Reylé, C., Ribeiro, R. A., Rimoldini, L., Ripepi, V., Riva, A., Rixon, G., Roelens, M., Romero-Gómez, M., Rowell, N., Royer, F., Ruiz-Dern, L., Sadowski, G., Sagristà Sellés, T., Sahlmann, J., Salgado, J., Salguero, E., Sarasso, M., Savietto, H., Schultheis, M., Sciacca, E., Segol, M., Segovia, J. C., Segransan, D., Shih, I.-C., Smareglia, R., Smart, R. L., Solano, E., Solitro, F., Sordo, R., Soria Nieto, S., Souchay, J., Spagna, A., Spoto, F., Stampa, U., Steele, I. A., Steidelmüller, H., Stephenson, C. A., Stoev, H., Suess, F. F., Süveges, M., Surdej, J., Szabados, L., Szegedi-Elek, E., Tapiador, D., Taris, F., Tauran, G., Taylor, M. B., Teixeira, R., Terrett, D., Tingley, B., Trager, S. C., Turon, C., Ulla, A., Utrilla, E., Valentini, G., van Elteren, A., Van Hemelryck, E., van Leeuwen, M., Varadi, M., Vecchiato, A., Veljanoski, J., Via, T., Vicente, D., Vogt, S., Voss, H., Votruba, V., Voutsinas, S., Walmsley, G., Weiler, M., Weingrill, K., Wevers, T., Wyrzykowski, Ł., Yoldas, A., Žerjal, M., Zucker, S., Zurbach, C., Zwitter, T., Alecu, A., Allen, M., Allende Prieto, C., Amorim, A., Anglada-Escudé, G., Arsenijevic, V., Azaz, S., Balm, P., Beck, M., Bernstein, H.-H., Bigot, L., Bijaoui, A., Blasco, C., Bonfigli, M., Bono, G., Boudreault, S., Bressan, A., Brown, S., Brunet, P.-M., Bunclark, P., Buonanno, R., Butkevich, A. G., Carret, C., Carrion, C., Chemin, L., Chéreau, F., Corcione, L., Darmigny, E., de Boer, K. S., de Teodoro, P., de Zeeuw, P. T., Delle Luche, C., Domingues, C. D., Dubath, P., Fodor, F., Frézouls, B., Fries, A., Fustes, D., Fyfe, D., Gallardo, E., Gallegos, J., Gardiol, D., Gebran, M., Gomboc, A., Gómez, A., Grux, E., Gueguen, A., Heyrovsky, A., Hoar, J., Iannicola, G., Isasi Parache, Y., Janotto, A.-M., Joliet, E., Jonckheere, A., Keil, R., Kim, D.-W., Klagyivik, P., Klar, J., Knude, J., Kochukhov, O., Kolka, I., Kos, J., Kutka, A., Lainey, V., LeBouquin, D., Liu, C., Loreggia, D., Makarov, V. V., Marseille, M. G., Martayan, C., Martinez-Rubi, O., Massart, B., Meynadier, F., Mignot, S., Munari, U., Nguyen, A.-T., Nordlander, T., Ocvirk, P., O’Flaherty, K. S., Olias Sanz, A., Ortiz, P., Osorio, J., Oszkiewicz, D., Ouzounis, A., Palmer, M., Park, P., Pasquato, E., Peltzer, C., Peralta, J., Péturaud, F., Pieniluoma, T., Pigozzi, E., Poels, J., Prat, G., Prod’homme, T., Raison, F., Rebordao, J. M., Risquez, D., Rocca-Volmerange, B., Rosen, S., Ruiz-Fuertes, M. I., Russo, F., Sembay, S., Serraller Vizcaino, I., Short, A., Siebert, A., Silva, H., Sinachopoulos, D., Slezak, E., Soffel, M., Sosnowska, D., Straižys, V., ter Linden, M., Terrell, D., Theil, S., Tiede, C., Troisi, L., Tsalmantza, P., Tur, D., Vaccari, M., Vachier, F., Valles, P., Van Hamme, W., Veltz, L., Virtanen, J., Wallut, J.-M., Wichmann, R., Wilkinson, M. I., Ziaeepour, H., and Zschocke, S.

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23. TheGaia-ESO Survey: radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk

Author

M. Bergemann, G. R. Ruchti, A. Serenelli, S. Feltzing, A. Alves-Brito, M. Asplund, T. Bensby, P. Gruiters, U. Heiter, A. Hourihane, A. Korn, K. Lind, A. Marino, P. Jofre, T. Nordlander, N. Ryde, C. C. Worley, G. Gilmore, S. Randich, A. M. N. Ferguson, R. D. Jeffries, G. Micela, I. Negueruela, T. Prusti, H.-W. Rix, A. Vallenari, E. J. Alfaro, C. Allende Prieto, A. Bragaglia, S. E. Koposov, A. C. Lanzafame, E. Pancino, A. Recio-Blanco, R. Smiljanic, N. Walton, M. T. Costado, E. Franciosini, V. Hill, C. Lardo, P. de Laverny, L. Magrini, E. Maiorca, T. Masseron, L. Morbidelli, G. Sacco, G. Kordopatis, G. Tautvaišienė, Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Astrofísica Estelar (AE), Bergemann M., Ruchti G.R., Serenelli A., Feltzing S., Alves-Brito A., Asplund M., Bensby T., Gruiters P., Heiter U., Hourihane A., Korn A., Lind K., Marino A., Jofre P., Nordlander T., Ryde N., Worley C.C., Gilmore G., Randich S., Ferguson A.M.N., Jeffries R.D., Micela G., Negueruela I., Prusti T., Rix H.-W., Vallenari A., Alfaro E.J., Allende Prieto C., Bragaglia A., Koposov S.E., Lanzafame A.C., Pancino E., Recio-Blanco A., Smiljanic R., Walton N., Costado M.T., Franciosini E., Hill V., Lardo C., De Laverny P., Magrini L., Maiorca E., Masseron T., Morbidelli L., Sacco G., Kordopatis G., and Tautvaisiene G.

Subjects
Solar neighborhood, Milky Way, Metallicity, Formation, FOS: Physical sciences, Galaxia, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Surveys, fundamental parameters [Stars], Astronomia ultravioleta, 01 natural sciences, Spectral line, Galaxy: disk, Stars:fundamental parameter, Fundamental parameters, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Abundances, Disc, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Astronomía y Astrofísica, Mapeamentos astronômicos, Physics, 010308 nuclear & particles physics, Plane (geometry), Stars:abundance, Vertical distance, Astronomy and Astrophysics, Composicao estelar, Astrophysics - Astrophysics of Galaxies, Espectros estelares, Stars, Galaxy, formation [Galaxy], Galaxy: formation, Disk, Space and Planetary Science, abundances [Stars], Astrophysics of Galaxies (astro-ph.GA), Magnitude (astronomy), Astrophysics::Earth and Planetary Astrophysics, disk [Galaxy]
Abstract

We study the relationship between age, metallicity, and alpha-enhancement of FGK stars in the Galactic disk. The results are based upon the analysis of high-resolution UVES spectra from the Gaia-ESO large stellar survey. We explore the limitations of the observed dataset, i.e. the accuracy of stellar parameters and the selection effects that are caused by the photometric target preselection. We find that the colour and magnitude cuts in the survey suppress old metal-rich stars and young metal-poor stars. This suppression may be as high as 97% in some regions of the age-metallicity relationship. The dataset consists of 144 stars with a wide range of ages from 0.5 Gyr to 13.5 Gyr, Galactocentric distances from 6 kpc to 9.5 kpc, and vertical distances from the plane 0 < |Z| < 1.5 kpc. On this basis, we find that i) the observed age-metallicity relation is nearly flat in the range of ages between 0 Gyr and 8 Gyr; ii) at ages older than 9 Gyr, we see a decrease in [Fe/H] and a clear absence of metal-rich stars; this cannot be explained by the survey selection functions; iii) there is a significant scatter of [Fe/H] at any age; and iv) [Mg/Fe] increases with age, but the dispersion of [Mg/Fe] at ages > 9 Gyr is not as small as advocated by some other studies. In agreement with earlier work, we find that radial abundance gradients change as a function of vertical distance from the plane. The [Mg/Fe] gradient steepens and becomes negative. In addition, we show that the inner disk is not only more alpha-rich compared to the outer disk, but also older, as traced independently by the ages and Mg abundances of stars., accepted for publication in A&A

Published
2014

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