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150 results on '"Worley, C."'

1. Gaia FGK benchmark stars: Fundamental Teff and log g of the third version

Author: Soubiran, C., primary, Creevey, O. L., additional, Lagarde, N., additional, Brouillet, N., additional, Jofré, P., additional, Casamiquela, L., additional, Heiter, U., additional, Aguilera-Gómez, C., additional, Vitali, S., additional, Worley, C., additional, and de Brito Silva, D., additional
Published: 2024
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2. Gaia FGK benchmark stars : Fundamental Teff and log g of the third version

Author: Soubiran, C., Creevey, O. L., Lagarde, N., Brouillet, N., Jofre, P., Casamiquela, L., Heiter, Ulrike, Aguilera-Gomez, C., Vitali, S., Worley, C., de Brito Silva, D., Soubiran, C., Creevey, O. L., Lagarde, N., Brouillet, N., Jofre, P., Casamiquela, L., Heiter, Ulrike, Aguilera-Gomez, C., Vitali, S., Worley, C., and de Brito Silva, D.
Abstract: Context. Large spectroscopic surveys devoted to the study of the Milky Way, including Gaia, use automated pipelines to determine the atmospheric parameters of millions of stars. The Gaia FGK benchmark stars are reference stars with T-eff and log g derived through fundamental relations, independently of spectroscopy, to be used as anchors for the parameter scale. The first and second versions of the sample have been extensively used for that purpose, and more generally to help constrain stellar models. Aims. We provide the third version of the Gaia FGK benchmark stars, an extended set intended to improve the calibration of spectroscopic surveys, and their interconnection. Methods. We have compiled about 200 candidates that have precise measurements of angular diameters and parallaxes. We determined their bolometric fluxes by fitting their spectral energy distribution. Masses were determined using two sets of stellar evolution models. In a companion paper, we describe the determination of metallicities and detailed abundances. Results. We provide a new set of 192 Gaia FGK benchmark stars with their fundamental T-eff and log g, and with uncertainties lower than 2% for most stars. Compared to the previous versions, the homogeneity and accuracy of the fundamental parameters are significantly improved thanks to the high quality of the Gaia photometric and astrometric data.
Published: 2024
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3. The Gaia-ESO Survey: Homogenisation of stellar parameters and elemental abundances

Author: Hourihane, A., primary, François, P., additional, Worley, C. C., additional, Magrini, L., additional, Gonneau, A., additional, Casey, A. R., additional, Gilmore, G., additional, Randich, S., additional, Sacco, G. G., additional, Recio-Blanco, A., additional, Korn, A. J., additional, Allende Prieto, C., additional, Smiljanic, R., additional, Blomme, R., additional, Bragaglia, A., additional, Walton, N. A., additional, Van Eck, S., additional, Bensby, T., additional, Lanzafame, A., additional, Frasca, A., additional, Franciosini, E., additional, Damiani, F., additional, Lind, K., additional, Bergemann, M., additional, Bonifacio, P., additional, Hill, V., additional, Lobel, A., additional, Montes, D., additional, Feuillet, D. K., additional, Tautvaišienė, G., additional, Guiglion, G., additional, Tabernero, H. M., additional, González Hernández, J. I., additional, Gebran, M., additional, Van der Swaelmen, M., additional, Mikolaitis, Š., additional, Daflon, S., additional, Merle, T., additional, Morel, T., additional, Lewis, J. R., additional, González Solares, E. A., additional, Murphy, D. N. A., additional, Jeffries, R. D., additional, Jackson, R. J., additional, Feltzing, S., additional, Prusti, T., additional, Carraro, G., additional, Biazzo, K., additional, Prisinzano, L., additional, Jofré, P., additional, Zaggia, S., additional, Drazdauskas, A., additional, Stonkuté, E., additional, Marfil, E., additional, Jiménez-Esteban, F., additional, Mahy, L., additional, Gutiérrez Albarrán, M. L., additional, Berlanas, S. R., additional, Santos, W., additional, Morbidelli, L., additional, Spina, L., additional, and Minkevičiūtė, R., additional
Published: 2023
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4. Gaia FGK benchmark stars: Fundamental Teff and log g of the third version.

Author: Soubiran, C., Creevey, O. L., Lagarde, N., Brouillet, N., Jofré, P., Casamiquela, L., Heiter, U., Aguilera-Gómez, C., Vitali, S., Worley, C., and de Brito Silva, D.
Subjects: SPECTRAL energy distribution, STELLAR evolution, STELLAR atmospheres, MILKY Way, ANGULAR measurements
Abstract: Context. Large spectroscopic surveys devoted to the study of the Milky Way, including Gaia, use automated pipelines to determine the atmospheric parameters of millions of stars. The Gaia FGK benchmark stars are reference stars with Teff and log 푔 derived through fundamental relations, independently of spectroscopy, to be used as anchors for the parameter scale. The first and second versions of the sample have been extensively used for that purpose, and more generally to help constrain stellar models. Aims. We provide the third version of the Gaia FGK benchmark stars, an extended set intended to improve the calibration of spectroscopic surveys, and their interconnection. Methods. We have compiled about 200 candidates that have precise measurements of angular diameters and parallaxes. We determined their bolometric fluxes by fitting their spectral energy distribution. Masses were determined using two sets of stellar evolution models. In a companion paper, we describe the determination of metallicities and detailed abundances. Results. We provide a new set of 192 Gaia FGK benchmark stars with their fundamental Teff and log 푔, and with uncertainties lower than 2% for most stars. Compared to the previous versions, the homogeneity and accuracy of the fundamental parameters are significantly improved thanks to the high quality of the Gaia photometric and astrometric data. [ABSTRACT FROM AUTHOR]
Published: 2024
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5. 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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6. The Gaia-ESO Survey: Lithium measurements and new curves of growth,

Author: Franciosini, E., primary, Randich, S., additional, de Laverny, P., additional, Biazzo, K., additional, Feuillet, D. K., additional, Frasca, A., additional, Lind, K., additional, Prisinzano, L., additional, Tautvaišiene, G., additional, Lanzafame, A. C., additional, Smiljanic, R., additional, Gonneau, A., additional, Magrini, L., additional, Pancino, E., additional, Guiglion, G., additional, Sacco, G. G., additional, Sanna, N., additional, Gilmore, G., additional, Bonifacio, P., additional, Jeffries, R. D., additional, Micela, G., additional, Prusti, T., additional, Alfaro, E. J., additional, Bensby, T., additional, Bragaglia, A., additional, François, P., additional, Korn, A. J., additional, Van Eck, S., additional, Bayo, A., additional, Bergemann, M., additional, Carraro, G., additional, Heiter, U., additional, Hourihane, A., additional, Jofré, P., additional, Lewis, J., additional, Martayan, C., additional, Monaco, L., additional, Morbidelli, L., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2022
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7. The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy

Author: Randich, S., primary, Gilmore, G., additional, Magrini, L., additional, Sacco, G. G., additional, Jackson, R. J., additional, Jeffries, R. D., additional, Worley, C. C., additional, Hourihane, A., additional, Gonneau, A., additional, Viscasillas Vazquez, C., additional, Franciosini, E., additional, Lewis, J. R., additional, Alfaro, E. J., additional, Allende Prieto, C., additional, Bensby, T., additional, Blomme, R., additional, Bragaglia, A., additional, Flaccomio, E., additional, François, P., additional, Irwin, M. J., additional, Koposov, S. E., additional, Korn, A. J., additional, Lanzafame, A. C., additional, Pancino, E., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Van Eck, S., additional, Zwitter, T., additional, Asplund, M., additional, Bonifacio, P., additional, Feltzing, S., additional, Binney, J., additional, Drew, J., additional, Ferguson, A. M. N., additional, Micela, G., additional, Negueruela, I., additional, Prusti, T., additional, Rix, H.-W., additional, Vallenari, A., additional, Bayo, A., additional, Bergemann, M., additional, Biazzo, K., additional, Carraro, G., additional, Casey, A. R., additional, Damiani, F., additional, Frasca, A., additional, Heiter, U., additional, Hill, V., additional, Jofré, P., additional, de Laverny, P., additional, Lind, K., additional, Marconi, G., additional, Martayan, C., additional, Masseron, T., additional, Monaco, L., additional, Morbidelli, L., additional, Prisinzano, L., additional, Sbordone, L., additional, Sousa, S. G., additional, Zaggia, S., additional, Adibekyan, V., additional, Bonito, R., additional, Caffau, E., additional, Daflon, S., additional, Feuillet, D. K., additional, Gebran, M., additional, Gonzalez Hernandez, J. I., additional, Guiglion, G., additional, Herrero, A., additional, Lobel, A., additional, Maiz Apellaniz, J., additional, Merle, T., additional, Mikolaitis, Š., additional, Montes, D., additional, Morel, T., additional, Soubiran, C., additional, Spina, L., additional, Tabernero, H. M., additional, Tautvaišiene, G., additional, Traven, G., additional, Valentini, M., additional, Van der Swaelmen, M., additional, Villanova, S., additional, Wright, N. J., additional, Abbas, U., additional, Aguirre Børsen-Koch, V., additional, Alves, J., additional, Balaguer-Nunez, L., additional, Barklem, P. S., additional, Barrado, D., additional, Berlanas, S. R., additional, Binks, A. S., additional, Bressan, A., additional, Capuzzo-Dolcetta, R., additional, Casagrande, L., additional, Casamiquela, L., additional, Collins, R. S., additional, D'Orazi, V., additional, Dantas, M. L. L., additional, Debattista, V. P., additional, Delgado-Mena, E., additional, Di Marcantonio, P., additional, Drazdauskas, A., additional, Evans, N. W., additional, Famaey, B., additional, Franchini, M., additional, Frémat, Y., additional, Friel, E. D., additional, Fu, X., additional, Geisler, D., additional, Gerhard, O., additional, Gonzalez Solares, E. A., additional, Grebel, E. K., additional, Gutierrez Albarran, M. L., additional, Hatzidimitriou, D., additional, Held, E. V., additional, Jiménez-Esteban, F., additional, Jönsson, H., additional, Jordi, C., additional, Khachaturyants, T., additional, Kordopatis, G., additional, Kos, J., additional, Lagarde, N., additional, Mahy, L., additional, Mapelli, M., additional, Marfil, E., additional, Martell, S. L., additional, Messina, S., additional, Miglio, A., additional, Minchev, I., additional, Moitinho, A., additional, Montalban, J., additional, Monteiro, M. J. P. F. G., additional, Morossi, C., additional, Mowlavi, N., additional, Mucciarelli, A., additional, Murphy, D. N. A., additional, Nardetto, N., additional, Ortolani, S., additional, Paletou, F., additional, Palouš, J., additional, Paunzen, E., additional, Pickering, J. C., additional, Quirrenbach, A., additional, Re Fiorentin, P., additional, Read, J. I., additional, Romano, D., additional, Ryde, N., additional, Sanna, N., additional, Santos, W., additional, Seabroke, G. M., additional, Spagna, A., additional, Steinmetz, M., additional, Stonkuté, E., additional, Sutorius, E., additional, Thévenin, F., additional, Tosi, M., additional, Tsantaki, M., additional, Vink, J. S., additional, Wright, N., additional, Wyse, R. F. G., additional, Zoccali, M., additional, Zorec, J., additional, Zucker, D. B., additional, and Walton, N. A., additional
Published: 2022
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8. The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products

Author: Gilmore, G., primary, Randich, S., additional, Worley, C. C., additional, Hourihane, A., additional, Gonneau, A., additional, Sacco, G. G., additional, Lewis, J. R., additional, Magrini, L., additional, François, P., additional, Jeffries, R. D., additional, Koposov, S. E., additional, Bragaglia, A., additional, Alfaro, E. J., additional, Allende Prieto, C., additional, Blomme, R., additional, Korn, A. J., additional, Lanzafame, A. C., additional, Pancino, E., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Van Eck, S., additional, Zwitter, T., additional, Bensby, T., additional, Flaccomio, E., additional, Irwin, M. J., additional, Franciosini, E., additional, Morbidelli, L., additional, Damiani, F., additional, Bonito, R., additional, Friel, E. D., additional, Vink, J. S., additional, Prisinzano, L., additional, Abbas, U., additional, Hatzidimitriou, D., additional, Held, E. V., additional, Jordi, C., additional, Paunzen, E., additional, Spagna, A., additional, Jackson, R. J., additional, Maíz Apellániz, J., additional, Asplund, M., additional, Bonifacio, P., additional, Feltzing, S., additional, Binney, J., additional, Drew, J., additional, Ferguson, A. M. N., additional, Micela, G., additional, Negueruela, I., additional, Prusti, T., additional, Rix, H.-W., additional, Vallenari, A., additional, Bergemann, M., additional, Casey, A. R., additional, de Laverny, P., additional, Frasca, A., additional, Hill, V., additional, Lind, K., additional, Sbordone, L., additional, Sousa, S. G., additional, Adibekyan, V., additional, Caffau, E., additional, Daflon, S., additional, Feuillet, D. K., additional, Gebran, M., additional, Gonzalez Hernandez, J. I., additional, Guiglion, G., additional, Herrero, A., additional, Lobel, A., additional, Merle, T., additional, Mikolaitis, Š., additional, Montes, D., additional, Morel, T., additional, Ruchti, G., additional, Soubiran, C., additional, Tabernero, H. M., additional, Tautvaišienė, G., additional, Traven, G., additional, Valentini, M., additional, Van der Swaelmen, M., additional, Villanova, S., additional, Viscasillas Vázquez, C., additional, Bayo, A., additional, Biazzo, K., additional, Carraro, G., additional, Edvardsson, B., additional, Heiter, U., additional, Jofré, P., additional, Marconi, G., additional, Martayan, C., additional, Masseron, T., additional, Monaco, L., additional, Walton, N. A., additional, Zaggia, S., additional, Aguirre Børsen-Koch, V., additional, Alves, J., additional, Balaguer-Nunez, L., additional, Barklem, P. S., additional, Barrado, D., additional, Bellazzini, M., additional, Berlanas, S. R., additional, Binks, A. S., additional, Bressan, A., additional, Capuzzo-Dolcetta, R., additional, Casagrande, L., additional, Casamiquela, L., additional, Collins, R. S., additional, D'Orazi, V., additional, Dantas, M. L. L., additional, Debattista, V. P., additional, Delgado-Mena, E., additional, Di Marcantonio, P., additional, Drazdauskas, A., additional, Evans, N. W., additional, Famaey, B., additional, Franchini, M., additional, Frémat, Y., additional, Fu, X., additional, Geisler, D., additional, Gerhard, O., additional, González Solares, E. A., additional, Grebel, E. K., additional, Gutiérrez Albarrán, M. L., additional, Jiménez-Esteban, F., additional, Jönsson, H., additional, Khachaturyants, T., additional, Kordopatis, G., additional, Kos, J., additional, Lagarde, N., additional, Ludwig, H.-G., additional, Mahy, L., additional, Mapelli, M., additional, Marfil, E., additional, Martell, S. L., additional, Messina, S., additional, Miglio, A., additional, Minchev, I., additional, Moitinho, A., additional, Montalban, J., additional, Monteiro, M. J. P. F. G., additional, Morossi, C., additional, Mowlavi, N., additional, Mucciarelli, A., additional, Murphy, D. N. A., additional, Nardetto, N., additional, Ortolani, S., additional, Paletou, F., additional, Palouš, J., additional, Pickering, J. C., additional, Quirrenbach, A., additional, Re Fiorentin, P., additional, Read, J. I., additional, Romano, D., additional, Ryde, N., additional, Sanna, N., additional, Santos, W., additional, Seabroke, G. M., additional, Spina, L., additional, Steinmetz, M., additional, Stonkuté, E., additional, Sutorius, E., additional, Thévenin, F., additional, Tosi, M., additional, Tsantaki, M., additional, Wright, N., additional, Wyse, R. F. G., additional, Zoccali, M., additional, Zorec, J., additional, and Zucker, D. B., additional
Published: 2022
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9. TheGaia-ESO survey: A spectroscopic study of the young open cluster NGC 3293

Author: Morel, T., primary, Blazère, A., additional, Semaan, T., additional, Gosset, E., additional, Zorec, J., additional, Frémat, Y., additional, Blomme, R., additional, Daflon, S., additional, Lobel, A., additional, Nieva, M. F., additional, Przybilla, N., additional, Gebran, M., additional, Herrero, A., additional, Mahy, L., additional, Santos, W., additional, Tautvaišienė, G., additional, Gilmore, G., additional, Randich, S., additional, Alfaro, E. J., additional, Bergemann, M., additional, Carraro, G., additional, Damiani, F., additional, Franciosini, E., additional, Morbidelli, L., additional, Pancino, E., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2022
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10. The Gaia-ESO Survey: The analysis of the hot-star spectra

Author: Blomme, R., primary, Daflon, S., additional, Gebran, M., additional, Herrero, A., additional, Lobel, A., additional, Mahy, L., additional, Martins, F., additional, Morel, T., additional, Berlanas, S. R., additional, Blazère, A., additional, Frémat, Y., additional, Gosset, E., additional, Maíz Apellániz, J., additional, Santos, W., additional, Semaan, T., additional, Simón-Díaz, S., additional, Volpi, D., additional, Holgado, G., additional, Jiménez-Esteban, F., additional, Nieva, M. F., additional, Przybilla, N., additional, Gilmore, G., additional, Randich, S., additional, Negueruela, I., additional, Prusti, T., additional, Vallenari, A., additional, Alfaro, E. J., additional, Bensby, T., additional, Bragaglia, A., additional, Flaccomio, E., additional, Francois, P., additional, Korn, A. J., additional, Lanzafame, A., additional, Pancino, E., additional, Smiljanic, R., additional, Bergemann, M., additional, Carraro, G., additional, Franciosini, E., additional, Gonneau, A., additional, Heiter, U., additional, Hourihane, A., additional, Jofré, P., additional, Magrini, L., additional, Morbidelli, L., additional, Sacco, G. G., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2022
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11. The Gaia-ESO Survey : The analysis of the hot-star spectra

Author: Blomme, R., Daflon, S., Gebran, M., Herrero, A., Lobel, A., Mahy, L., Martins, F., Morel, T., Berlanas, S. R., Blazere, A., Fremat, Y., Gosset, E., Apellaniz, J. Maiz, Santos, W., Semaan, T., Simon-Diaz, S., Volpi, D., Holgado, G., Jimenez-Esteban, F., Nieva, M. F., Przybilla, N., Gilmore, G., Randich, S., Negueruela, I, Prusti, T., Vallenari, A., Alfaro, E. J., Bensby, T., Bragaglia, A., Flaccomio, E., Francois, P., Korn, Andreas, Lanzafame, A., Pancino, E., Smiljanic, R., Bergemann, M., Carraro, G., Franciosini, E., Gonneau, A., Heiter, Ulrike, Hourihane, A., Jofre, P., Magrini, L., Morbidelli, L., Sacco, G. G., Worley, C. C., Zaggia, S., Blomme, R., Daflon, S., Gebran, M., Herrero, A., Lobel, A., Mahy, L., Martins, F., Morel, T., Berlanas, S. R., Blazere, A., Fremat, Y., Gosset, E., Apellaniz, J. Maiz, Santos, W., Semaan, T., Simon-Diaz, S., Volpi, D., Holgado, G., Jimenez-Esteban, F., Nieva, M. F., Przybilla, N., Gilmore, G., Randich, S., Negueruela, I, Prusti, T., Vallenari, A., Alfaro, E. J., Bensby, T., Bragaglia, A., Flaccomio, E., Francois, P., Korn, Andreas, Lanzafame, A., Pancino, E., Smiljanic, R., Bergemann, M., Carraro, G., Franciosini, E., Gonneau, A., Heiter, Ulrike, Hourihane, A., Jofre, P., Magrini, L., Morbidelli, L., Sacco, G. G., Worley, C. C., and Zaggia, S.
Abstract: Context. The Gaia-ESO Survey (GES) is a large public spectroscopic survey that has collected, over a period of six years, spectra of similar to 10(5) stars. This survey provides not only the reduced spectra, but also the stellar parameters and abundances resulting from the analysis of the spectra. Aims. The GES dataflow is organised in 19 working groups. Working group 13 (WG13) is responsible for the spectral analysis of the hottest stars (O, B, and A type, with a formal cutoff of T-eff > 7000 K) that were observed as part of GES. We present the procedures and techniques that have been applied to the reduced spectra in order to determine the stellar parameters and abundances of these stars. Methods. The procedure used was similar to that of other working groups in GES. A number of groups (called Nodes) each independently analyse the spectra via state-of-the-art techniques and codes. Specific for the analysis in WG13 was the large temperature range covered (T-eff approximate to 7000-50 000 K), requiring the use of different analysis codes. Most Nodes could therefore only handle part of the data. Quality checks were applied to the results of these Nodes by comparing them to benchmark stars, and by comparing them to one another. For each star the Node values were then homogenised into a single result: the recommended parameters and abundances. Results. Eight Nodes each analysed part of the data. In total 17 693 spectra of 6462 stars were analysed, most of them in 37 open star clusters. The homogenisation led to stellar parameters for 5584 stars. Abundances were determined for a more limited number of stars. The elements studied are He, C, N, O, Ne, Mg, Al, Si, and Sc. Abundances for at least one of these elements were determined for 292 stars. Conclusions. The hot-star data analysed here, as well as the GES data in general, will be of considerable use in future studies of stellar evolution and open clusters.
Published: 2022
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12. The Gaia-ESO survey : Age-chemical-clock relations spatially resolved in the Galactic disc

Author: Viscasillas Vazquez, C., Magrini, L., Casali, G., Tautvaisiene, G., Spina, L., van der Swaelmen, M., Randich, S., Bensby, T., Bragaglia, A., Friel, E., Feltzing, S., Sacco, G. G., Turchi, A., Jimenez-Esteban, F., D'Orazi, V., Delgado-Mena, E., Mikolaitis, S., Drazdauskas, A., Minkeviciute, R., Stonkute, E., Bagdonas, V., Montes, D., Guiglion, G., Baratella, M., Tabernero, H. M., Gilmore, G., Alfaro, E., Francois, P., Korn, Andreas, Smiljanic, R., Bergemann, M., Franciosini, E., Gonneau, A., Hourihane, A., Worley, C. C., Zaggia, S., Viscasillas Vazquez, C., Magrini, L., Casali, G., Tautvaisiene, G., Spina, L., van der Swaelmen, M., Randich, S., Bensby, T., Bragaglia, A., Friel, E., Feltzing, S., Sacco, G. G., Turchi, A., Jimenez-Esteban, F., D'Orazi, V., Delgado-Mena, E., Mikolaitis, S., Drazdauskas, A., Minkeviciute, R., Stonkute, E., Bagdonas, V., Montes, D., Guiglion, G., Baratella, M., Tabernero, H. M., Gilmore, G., Alfaro, E., Francois, P., Korn, Andreas, Smiljanic, R., Bergemann, M., Franciosini, E., Gonneau, A., Hourihane, A., Worley, C. C., and Zaggia, S.
Abstract: Context. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. Aims. To complete this picture, it is necessary to map the ages of its stellar populations. During recent years, the dependence on time of abundance ratios involving slow (s) neutron-capture and ff elements (called chemical-clocks) has been used to provide estimates of stellar ages, usually in a limited volume close to the Sun. We aim to analyse the relations of chemical clocks in the Galactic disc extending the range to R-GC similar to 6-20 kpc. Methods. Using the sixth internal data release of the Gaia-ESO survey, we calibrated several relations between stellar ages and abundance ratios [s/alpha] using a sample of open clusters, the largest one so far used with this aim (62 clusters). Thanks to their wide galactocentric coverage, we investigated the radial variations of the shape of these relations, confirming their non-universality. Results. The multi-variate relations allowed us to infer stellar ages for field stars. We estimated our accuracy (ranging from 0.0 to -0.9 Gyr) and precision (from 0.4 to 2.3 Gyr) in recovering the global ages of open clusters, and the ages of their individual members. We applied the relations with the highest correlation coe fficients to the field star population, finding an older population at lower metallicity and higher [alpha/Fe] in the thin disc, and a younger one at higher [Fe/H] and low [alpha/Fe], as expected. Conclusion. We confirm that there is no single age-chemical clock relationship valid for the whole disc, but that there is a dependence on the galactocentric position, which is related to the radial variation of the star formation history combined with the non-monotonic dependence on metallicity of the yields of the s-process elements from low- and intermediate-mass stars. Finally, the abundance ratios [Ba/alpha] are more sensitive to age than those
Published: 2022
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13. The Gaia-ESO Survey: Lithium measurements and new curves of growth

Author: Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Franciosini, E., Randich, S., de Laverny, P., Biazzo, K., Feuillet, D. K., Frasca, A., Lind, K., Prisinzano, L., Tautvaišiene, G., Lanzafame, A. C., Smiljanic, R., Gonneau, A., Magrini, L., Pancino, E., Guiglion, Guillaume, Sacco, G. G., Sanna, N., Gilmore, Gerry, Bonifacio, P., Jeffries, R. D., Micela, Giusi, Prusti, T., Alfaro, Emilio J., Bensby, T., Bragaglia, A., François, P., Korn, A. J., Van Eck, S., Bayo, A., Bergemann, Maria, Carraro, G., Heiter, Ulrike, Hourihane, A., Jofré, P., Lewis, J., Martayan, C., Monaco, L., Morbidelli, L., Worley, C. C., Zaggia, S., Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Franciosini, E., Randich, S., de Laverny, P., Biazzo, K., Feuillet, D. K., Frasca, A., Lind, K., Prisinzano, L., Tautvaišiene, G., Lanzafame, A. C., Smiljanic, R., Gonneau, A., Magrini, L., Pancino, E., Guiglion, Guillaume, Sacco, G. G., Sanna, N., Gilmore, Gerry, Bonifacio, P., Jeffries, R. D., Micela, Giusi, Prusti, T., Alfaro, Emilio J., Bensby, T., Bragaglia, A., François, P., Korn, A. J., Van Eck, S., Bayo, A., Bergemann, Maria, Carraro, G., Heiter, Ulrike, Hourihane, A., Jofré, P., Lewis, J., Martayan, C., Monaco, L., Morbidelli, L., Worley, C. C., and Zaggia, S.
Abstract: Context. The Gaia-ESO Survey (GES) is a large public spectroscopic survey that was carried out using the multi-object FLAMES spectrograph at the Very Large Telescope. The survey provides accurate radial velocities, stellar parameters, and elemental abundances for ~115 000 stars in all Milky Way components. Aims. In this paper, we describe the method adopted in the final data release to derive lithium equivalent widths (EWs) and abundances. Methods. Lithium EWs were measured using two different approaches for FGK and M-type stars, to account for the intrinsic differences in the spectra. For FGK stars, we fitted the lithium line using Gaussian components, while direct integration over a predefined interval was adopted for M-type stars. Care was taken to ensure continuity between the two regimes. Abundances were derived using a new set of homogeneous curves of growth that were derived specifically for GES, and which were measured on a synthetic spectral grid consistently with the way the EWs were measured. The derived abundances were validated by comparison with those measured by other analysis groups using different methods. Results. Lithium EWs were measured for ~40 000 stars, and abundances could be derived for ~38 000 of them. The vast majority of the measures (80%) have been obtained for stars in open cluster fields. The remaining objects are stars in globular clusters, or field stars in the Milky Way disc, bulge, and halo. Conclusions. The GES dataset of homogeneous lithium abundances described here will be valuable for our understanding of several processes, from stellar evolution and internal mixing in stars at different evolutionary stages to Galactic evolution. © E. Franciosini et al. 2022.
Published: 2022

14. The Gaia-ESO survey: A spectroscopic study of the young open cluster NGC 3293

Author: Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Morel, T., Blazère, A., Semaan, T., Gosset, E., Zorec, J., Frémat, Y., Blomme, R., Daflon, S., Lobel, A., Nieva, M. F., Przybilla, N., Gebran, M., Herrero, A., Mahy, L., Santos, W., Tautvaišienė, G., Gilmore, Gerry, Randich, S., Alfaro, Emilio J., Bergemann, Maria, Carraro, G., Damiani, F., Franciosini, E., Morbidelli, L., Pancino, E., Worley, C. C., Zaggia, S., Ministerio de Ciencia e Innovación (España), European Commission, European Research Council, Morel, T., Blazère, A., Semaan, T., Gosset, E., Zorec, J., Frémat, Y., Blomme, R., Daflon, S., Lobel, A., Nieva, M. F., Przybilla, N., Gebran, M., Herrero, A., Mahy, L., Santos, W., Tautvaišienė, G., Gilmore, Gerry, Randich, S., Alfaro, Emilio J., Bergemann, Maria, Carraro, G., Damiani, F., Franciosini, E., Morbidelli, L., Pancino, E., Worley, C. C., and Zaggia, S.
Abstract: We present a spectroscopic analysis of the GIRAFFE and UVES data collected by the Gaia-ESO survey for the young open cluster NGC 3293. Archive spectra from the same instruments obtained in the framework of the ‘VLT-FLAMES survey of massive stars’ are also analysed. Atmospheric parameters, non-local thermodynamic equilibrium (LTE) chemical abundances for six elements (He, C, N, Ne, Mg, and Si), or variability information are reported for a total of about 160 B stars spanning a wide range in terms of spectral types (B1 to B9.5) and rotation rate (up to 350 km s−1). Our analysis leads to about a five-fold increase in the number of cluster members with an abundance determination and it characterises the late B-star population in detail for the first time. We take advantage of the multi-epoch observations on various timescales and a temporal baseline, sometimes spanning ∼15 years, to detect several binary systems or intrinsically line-profile variables. A deconvolution algorithm is used to infer the current, true (deprojected) rotational velocity distribution. We find a broad, Gaussian-like distribution peaking around 200–250 km s−1. Although some stars populate the high-velocity tail, most stars in the cluster appear to rotate far from critical. We discuss the chemical properties of the cluster, including the low occurrence of abundance peculiarities in the late B stars and the paucity of objects showing CN-cycle burning products at their surface. We argue that the former result can largely be explained by the inhibition of diffusion effects because of fast rotation, while the latter is generally in accord with the predictions of single-star evolutionary models under the assumption of a wide range of initial spin rates at the onset of main-sequence evolution. However, we find some evidence for a less efficient mixing in two quite rapidly rotating stars that are among the most massive objects in our sample. Finally, we obtain a cluster age of ∼20 Myr through a detailed
Published: 2022

15. The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc

Author: Viscasillas Vázquez, C., primary, Magrini, L., additional, Casali, G., additional, Tautvaišienė, G., additional, Spina, L., additional, Van der Swaelmen, M., additional, Randich, S., additional, Bensby, T., additional, Bragaglia, A., additional, Friel, E., additional, Feltzing, S., additional, Sacco, G.G., additional, Turchi, A., additional, Jiménez-Esteban, F., additional, D’Orazi, V., additional, Delgado-Mena, E., additional, Mikolaitis, Š., additional, Drazdauskas, A., additional, Minkevičiūtė, R., additional, Stonkutė, E., additional, Bagdonas, V., additional, Montes, D., additional, Guiglion, G., additional, Baratella, M., additional, Tabernero, H. M., additional, Gilmore, G., additional, Alfaro, E., additional, Francois, P., additional, Korn, A., additional, Smiljanic, R., additional, Bergemann, M., additional, Franciosini, E., additional, Gonneau, A., additional, Hourihane, A., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2022
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16. Gaia-ESO Survey: Role of magnetic activity and starspots on pre-main-sequence lithium evolution

Author: Franciosini, E., primary, Tognelli, E., additional, Degl’Innocenti, S., additional, Prada Moroni, P. G., additional, Randich, S., additional, Sacco, G. G., additional, Magrini, L., additional, Pancino, E., additional, Lanzafame, A. C., additional, Smiljanic, R., additional, Prisinzano, L., additional, Sanna, N., additional, Roccatagliata, V., additional, Bonito, R., additional, de Laverny, P., additional, Gutiérrez Albarrán, M. L., additional, Montes, D., additional, Jiménez-Esteban, F., additional, Gilmore, G., additional, Bergemann, M., additional, Carraro, G., additional, Damiani, F., additional, Gonneau, A., additional, Hourihane, A., additional, Morbidelli, L., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2022
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17. Gaia-ESO survey: Lithium abundances in open cluster Red Clump stars

Author: Magrini, L., primary, Smiljanic, R., additional, Franciosini, E., additional, Pasquini, L., additional, Randich, S., additional, Casali, G., additional, Viscasillas Vázquez, C., additional, Bragaglia, A., additional, Spina, L., additional, Biazzo, K., additional, Tautvaišienė, G., additional, Masseron, T., additional, Van der Swaelmen, M., additional, Pancino, E., additional, Jiménez-Esteban, F., additional, Guiglion, G., additional, Martell, S., additional, Bensby, T., additional, D’Orazi, V., additional, Baratella, M., additional, Korn, A., additional, Jofre, P., additional, Gilmore, G., additional, Worley, C., additional, Hourihane, A., additional, Gonneau, A., additional, Sacco, G. G., additional, and Morbidelli, L., additional
Published: 2021
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18. The Gaia-ESO Survey: a new approach to chemically characterising young open clusters

Author: Baratella, M., primary, D’Orazi, V., additional, Sheminova, V., additional, Spina, L., additional, Carraro, G., additional, Gratton, R., additional, Magrini, L., additional, Randich, S., additional, Lugaro, M., additional, Pignatari, M., additional, Romano, D., additional, Biazzo, K., additional, Bragaglia, A., additional, Casali, G., additional, Desidera, S., additional, Frasca, A., additional, de Silva, G., additional, Melo, C., additional, Van der Swaelmen, M., additional, Tautvaišienė, G., additional, Jiménez-Esteban, F. M., additional, Gilmore, G., additional, Bensby, T., additional, Smiljanic, R., additional, Bayo, A., additional, Franciosini, E., additional, Gonneau, A., additional, Hourihane, A., additional, Jofré, P., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G., additional, Sbordone, L., additional, Worley, C., additional, and Zaggia, S., additional
Published: 2021
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19. The Gaia-ESO Survey: Galactic evolution of lithium from iDR6

Author: Romano, D., primary, Magrini, L., additional, Randich, S., additional, Casali, G., additional, Bonifacio, P., additional, Jeffries, R. D., additional, Matteucci, F., additional, Franciosini, E., additional, Spina, L., additional, Guiglion, G., additional, Chiappini, C., additional, Mucciarelli, A., additional, Ventura, P., additional, Grisoni, V., additional, Bellazzini, M., additional, Bensby, T., additional, Bragaglia, A., additional, de Laverny, P., additional, Korn, A. J., additional, Martell, S. L., additional, Tautvaišienė, G., additional, Carraro, G., additional, Gonneau, A., additional, Jofré, P., additional, Pancino, E., additional, Smiljanic, R., additional, Vallenari, A., additional, Fu, X., additional, Gutiérrez Albarrán, M. L., additional, Jiménez-Esteban, F. M., additional, Montes, D., additional, Damiani, F., additional, Bergemann, M., additional, and Worley, C., additional
Published: 2021
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20. The Gaia-ESO Survey : Calibrating the lithium-age relation with open clusters and associations I. Cluster age range and initial membership selections

Author: Gutierrez Albarran, M. L., Montes, D., Gomez Garrido, M., Tabernero, H. M., Gonzalez Hernandez, J. , I, Marfil, E., Frasca, A., Lanzafame, A. C., Klutsch, A., Franciosini, E., Randich, S., Smiljanic, R., Korn, Andreas, Gilmore, G., Alfaro, E. J., Baratella, M., Bayo, A., Bensby, T., Bonito, R., Carraro, G., Delgado Mena, E., Feltzing, S., Gonneau, A., Heiter, Ulrike, Hourihane, A., Jimenez Esteban, F., Jofre, P., Masseron, T., Monaco, L., Morbidelli, L., Prisinzano, L., Roccatagliata, V, Sousa, S., Van der Swaelmen, M., Worley, C. C., Zaggia, S., Gutierrez Albarran, M. L., Montes, D., Gomez Garrido, M., Tabernero, H. M., Gonzalez Hernandez, J. , I, Marfil, E., Frasca, A., Lanzafame, A. C., Klutsch, A., Franciosini, E., Randich, S., Smiljanic, R., Korn, Andreas, Gilmore, G., Alfaro, E. J., Baratella, M., Bayo, A., Bensby, T., Bonito, R., Carraro, G., Delgado Mena, E., Feltzing, S., Gonneau, A., Heiter, Ulrike, Hourihane, A., Jimenez Esteban, F., Jofre, P., Masseron, T., Monaco, L., Morbidelli, L., Prisinzano, L., Roccatagliata, V, Sousa, S., Van der Swaelmen, M., Worley, C. C., and Zaggia, S.
Abstract: Context: Previous studies of open clusters have shown that lithium depletion is not only strongly age dependent but also shows a complex pattern with other parameters that is not yet understood. For pre- and main-sequence late-type stars, these parameters include metallicity, mixing mechanisms, convection structure, rotation, and magnetic activity. Aims: We perform a thorough membership analysis for a large number of stars observed within the Gaia-ESO survey (GES) in the field of 20 open clusters, ranging in age from young clusters and associations, to intermediate-age and old open clusters. Methods: Based on the parameters derived from the GES spectroscopic observations, we obtained lists of candidate members for each of the clusters in the sample by deriving radial velocity distributions and studying the position of the kinematic selections in the EW(Li)-versus-T-eff plane to obtain lithium members. We used gravity indicators to discard field contaminants and studied [Fe/H] metallicity to further confirm the membership of the candidates. We also made use of studies using recent data from the Gaia DR1 and DR2 releases to assess our member selections. Results: We identified likely member candidates for the sample of 20 clusters observed in GES (iDR4) with UVES and GIRAFFE, and conducted a comparative study that allowed us to characterize the properties of these members as well as identify field contaminant stars, both lithium-rich giants and non-giant outliers. Conclusions: This work is the first step towards the calibration of the lithium-age relation and its dependence on other GES parameters. During this project we aim to use this relation to infer the ages of GES field stars, and identify their potential membership to young associations and stellar kinematic groups of different ages.
Published: 2020
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21. The Gaia -ESO Survey: Spectroscopic-asteroseismic analysis of K2 stars in Gaia -ESO

Author: Comisión Nacional de Investigación Científica y Tecnológica (Chile), National Science Centre (Poland), Swedish National Space Agency, Knut and Alice Wallenberg Foundation, Science and Technology Facilities Council (UK), European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministero dell'Istruzione, dell'Università e della Ricerca, European Science Foundation, Worley, C. C., Alfaro, Emilio J., Comisión Nacional de Investigación Científica y Tecnológica (Chile), National Science Centre (Poland), Swedish National Space Agency, Knut and Alice Wallenberg Foundation, Science and Technology Facilities Council (UK), European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministero dell'Istruzione, dell'Università e della Ricerca, European Science Foundation, Worley, C. C., and Alfaro, Emilio J.
Abstract: Context. The extensive stellar spectroscopic datasets that are available for studies in Galactic Archeaology thanks to, for example, the Gaia-ESO Survey, now benefit from having a significant number of targets that overlap with asteroseismology projects such as Kepler, K2, and CoRoT. Combining the measurements from spectroscopy and asteroseismology allows us to attain greater accuracy with regard to the stellar parameters needed to characterise the stellar populations of the Milky Way. Aims. The aim of this Gaia-ESO Survey special project is to produce a catalogue of self-consistent stellar parameters by combining measurements from high-resolution spectroscopy and precision asteroseismology. Methods. We carried out an iterative analysis of 90 K2@Gaia-ESO red giants. The spectroscopic values of Teff were used as input in the seismic analysis to obtain log g values. The seismic estimates of log were then used to re-determine the spectroscopic values of Teff and [Fe/H]. Only one iteration was required to obtain parameters that are in good agreement for both methods and, thus, to obtain the final stellar parameters. A detailed analysis of outliers was carried out to ensure a robust determination of the parameters. The results were then combined with Gaia DR2 data to compare the seismic log with a parallax-based log and to investigate instances of variations in the velocity and possible binaries within the dataset. Results. This analysis produced a high-quality catalogue of stellar parameters for 90 red giant stars from K2@Gaia-ESO that were determined through iterations between spectroscopy and asteroseismology. We compared the seismic gravities with those based on Gaia parallaxes to find an offset which is similar to other studies that have used asteroseismology. Our catalogue also includes spectroscopic chemical abundances and radial velocities, as well as indicators for possible binary detections. © ESO 2020.
Published: 2020

22. The Gaia -ESO survey: The non-universality of the age-chemical-clocks-metallicity relations in the Galactic disc

Author: Science and Technology Facilities Council (UK), European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministerio de Economía y Competitividad (España), European Commission, Knut and Alice Wallenberg Foundation, Australian Research Council, Swedish National Space Agency, Swedish Research Council, Casali, G., Spina, Lorenzo, Magrini, L., Karakas, A. I., Kobayashi, C., Casey, A. R., Feltzing, S., Van der Swaelmen, M., Tsantaki, M., Jofré, P., Bragaglia, A., Feuillet, Diane, Bensby, T., Biazzo, K., Gonneau, A., Tautvaišienė, G., Baratella, M., Roccatagliata, V., Pancino, E., Sousa, S., Adibekyan, V., Martell, S., Bayo, A., Jackson, R. J., Jeffries, R.D., Gilmore, Gerry, Randich, S., Alfaro, Emilio J., Koposov, S.E., Korn, A.J., Recio-Blanco, A., Smiljanic, R., Franciosini, E., Hourihane, A., Monaco, L., Morbidelli, L., Sacco, G., Worley, C., Zaggia, S., Science and Technology Facilities Council (UK), European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministerio de Economía y Competitividad (España), European Commission, Knut and Alice Wallenberg Foundation, Australian Research Council, Swedish National Space Agency, Swedish Research Council, Casali, G., Spina, Lorenzo, Magrini, L., Karakas, A. I., Kobayashi, C., Casey, A. R., Feltzing, S., Van der Swaelmen, M., Tsantaki, M., Jofré, P., Bragaglia, A., Feuillet, Diane, Bensby, T., Biazzo, K., Gonneau, A., Tautvaišienė, G., Baratella, M., Roccatagliata, V., Pancino, E., Sousa, S., Adibekyan, V., Martell, S., Bayo, A., Jackson, R. J., Jeffries, R.D., Gilmore, Gerry, Randich, S., Alfaro, Emilio J., Koposov, S.E., Korn, A.J., Recio-Blanco, A., Smiljanic, R., Franciosini, E., Hourihane, A., Monaco, L., Morbidelli, L., Sacco, G., Worley, C., and Zaggia, S.
Abstract: Context. In the era of large spectroscopic surveys, massive databases of high-quality spectra coupled with the products of the Gaia satellite provide tools to outline a new picture of our Galaxy. In this framework, an important piece of information is provided by our ability to infer stellar ages, and consequently to sketch a Galactic timeline. Aims. We aim to provide empirical relations between stellar ages and abundance ratios for a sample of stars with very similar stellar parameters to those of the Sun, namely the so-called solar-like stars. We investigate the dependence on metallicity, and we apply our relations to independent samples, that is, the Gaia-ESO samples of open clusters and of field stars. Methods. We analyse high-resolution and high-signal-to-noise-ratio HARPS spectra of a sample of solar-like stars to obtain precise determinations of their atmospheric parameters and abundances for 25 elements and/or ions belonging to the main nucleosynthesis channels through differential spectral analysis, and of their ages through isochrone fitting. Results. We investigate the relations between stellar ages and several abundance ratios. For the abundance ratios with a steeper dependence on age, we perform multivariate linear regressions, in which we include the dependence on metallicity, [Fe/H]. We apply our best relations to a sample of open clusters located from the inner to the outer regions of the Galactic disc. Using our relations, we are able to recover the literature ages only for clusters located at RGC&Rlarr2; > &Rlarr2; 7 kpc. The values that we obtain for the ages of the inner-disc clusters are much greater than the literature ones. In these clusters, the content of neutron capture elements, such as Y and Zr, is indeed lower than expected from chemical evolution models, and consequently their [Y/Mg] and [Y/Al] are lower than in clusters of the same age located in the solar neighbourhood. With our chemical evolution model and a set of empirical yields
Published: 2020

23. Atomic data for the Gaia-ESO Survey

Author: Heiter, U., primary, Lind, K., additional, Bergemann, M., additional, Asplund, M., additional, Mikolaitis, Š., additional, Barklem, P. S., additional, Masseron, T., additional, de Laverny, P., additional, Magrini, L., additional, Edvardsson, B., additional, Jönsson, H., additional, Pickering, J. C., additional, Ryde, N., additional, Bayo Arán, A., additional, Bensby, T., additional, Casey, A. R., additional, Feltzing, S., additional, Jofré, P., additional, Korn, A. J., additional, Pancino, E., additional, Damiani, F., additional, Lanzafame, A., additional, Lardo, C., additional, Monaco, L., additional, Morbidelli, L., additional, Smiljanic, R., additional, Worley, C., additional, Zaggia, S., additional, Randich, S., additional, and Gilmore, G. F., additional
Published: 2021
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24. The Gaia-ESO Survey: Calibrating the lithium–age relation with open clusters and associations

Author: Gutiérrez Albarrán, M. L., primary, Montes, D., additional, Gómez Garrido, M., additional, Tabernero, H. M., additional, González Hernández, J. I., additional, Marfil, E., additional, Frasca, A., additional, Lanzafame, A. C., additional, Klutsch, A., additional, Franciosini, E., additional, Randich, S., additional, Smiljanic, R., additional, Korn, A. J., additional, Gilmore, G., additional, Alfaro, E. J., additional, Baratella, M., additional, Bayo, A., additional, Bensby, T., additional, Bonito, R., additional, Carraro, G., additional, Delgado Mena, E., additional, Feltzing, S., additional, Gonneau, A., additional, Heiter, U., additional, Hourihane, A., additional, Jiménez Esteban, F., additional, Jofre, P., additional, Masseron, T., additional, Monaco, L., additional, Morbidelli, L., additional, Prisinzano, L., additional, Roccatagliata, V., additional, Sousa, S., additional, Van der Swaelmen, M., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2020
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25. The Gaia-ESO Survey: Spectroscopic-asteroseismic analysis of K2 stars in Gaia-ESO

Author: Worley, C. C., primary, Jofré, P., additional, Rendle, B., additional, Miglio, A., additional, Magrini, L., additional, Feuillet, D., additional, Gavel, A., additional, Smiljanic, R., additional, Lind, K., additional, Korn, A., additional, Gilmore, G., additional, Randich, S., additional, Hourihane, A., additional, Gonneau, A., additional, Francois, P., additional, Lewis, J., additional, Sacco, G., additional, Bragaglia, A., additional, Heiter, U., additional, Feltzing, S., additional, Bensby, T., additional, Irwin, M., additional, Gonzalez Solares, E., additional, Murphy, D., additional, Bayo, A., additional, Sbordone, L., additional, Zwitter, T., additional, Lanzafame, A. C., additional, Walton, N., additional, Zaggia, S., additional, Alfaro, E. J., additional, Morbidelli, L., additional, Sousa, S., additional, Monaco, L., additional, Carraro, G., additional, and Lardo, C., additional
Published: 2020
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26. The Gaia-ESO Survey: A new diagnostic for accretion and outflow activity in the young cluster NGC 2264

Author: Bonito, R., primary, Prisinzano, L., additional, Venuti, L., additional, Damiani, F., additional, Micela, G., additional, Sacco, G., additional, Traven, G., additional, Biazzo, K., additional, Sbordone, L., additional, Masseron, T., additional, Zwitter, T., additional, Gonneau, A., additional, Bayo, A., additional, Roccatagliata, V., additional, Randich, S., additional, Vink, J. S., additional, Jofre, P., additional, Flaccomio, E., additional, Magrini, L., additional, Carraro, G., additional, Morbidelli, L., additional, Frasca, A., additional, Monaco, L., additional, Rigliaco, E., additional, Worley, C., additional, Hourihane, A., additional, Gilmore, G., additional, Franciosini, E., additional, Lewis, J., additional, and Koposov, S., additional
Published: 2020
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27. The Gaia-ESO Survey: Galactic evolution of lithium at high metallicity

Author: Randich, S., primary, Pasquini, L., additional, Franciosini, E., additional, Magrini, L., additional, Jackson, R. J., additional, Jeffries, R. D., additional, d’Orazi, V., additional, Romano, D., additional, Sanna, N., additional, Tautvaišienė, G., additional, Tsantaki, M., additional, Wright, N. J., additional, Gilmore, G., additional, Bensby, T., additional, Bragaglia, A., additional, Pancino, E., additional, Smiljanic, R., additional, Bayo, A., additional, Carraro, G., additional, Gonneau, A., additional, Hourihane, A., additional, Morbidelli, L., additional, and Worley, C. C., additional
Published: 2020
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28. The Gaia-ESO survey: the non-universality of the age–chemical-clocks–metallicity relations in the Galactic disc

Author: Casali, G., primary, Spina, L., additional, Magrini, L., additional, Karakas, A. I., additional, Kobayashi, C., additional, Casey, A. R., additional, Feltzing, S., additional, Van der Swaelmen, M., additional, Tsantaki, M., additional, Jofré, P., additional, Bragaglia, A., additional, Feuillet, D., additional, Bensby, T., additional, Biazzo, K., additional, Gonneau, A., additional, Tautvaišienė, G., additional, Baratella, M., additional, Roccatagliata, V., additional, Pancino, E., additional, Sousa, S., additional, Adibekyan, V., additional, Martell, S., additional, Bayo, A., additional, Jackson, R. J., additional, Jeffries, R. D., additional, Gilmore, G., additional, Randich, S., additional, Alfaro, E., additional, Koposov, S. E., additional, Korn, A. J., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Franciosini, E., additional, Hourihane, A., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G., additional, Worley, C., additional, and Zaggia, S., additional
Published: 2020
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29. The Gaia-ESO Survey: a new approach to chemically characterising young open clusters

Author: Baratella, M., primary, D’Orazi, V., additional, Carraro, G., additional, Desidera, S., additional, Randich, S., additional, Magrini, L., additional, Adibekyan, V., additional, Smiljanic, R., additional, Spina, L., additional, Tsantaki, M., additional, Tautvaišienė, G., additional, Sousa, S. G., additional, Jofré, P., additional, Jiménez-Esteban, F. M., additional, Delgado-Mena, E., additional, Martell, S., additional, Van der Swaelmen, M., additional, Roccatagliata, V., additional, Gilmore, G., additional, Alfaro, E. J., additional, Bayo, A., additional, Bensby, T., additional, Bragaglia, A., additional, Franciosini, E., additional, Gonneau, A., additional, Heiter, U., additional, Hourihane, A., additional, Jeffries, R. D., additional, Koposov, S. E., additional, Morbidelli, L., additional, Prisinzano, L., additional, Sacco, G., additional, Sbordone, L., additional, Worley, C., additional, Zaggia, S., additional, and Lewis, J., additional
Published: 2020
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30. The Gaia -ESO Survey: open clusters in Gaia -DR1

Author: Randich, S., Tognelli, E., Jackson, R., Jeffries, R., Degl’Innocenti, S., Pancino, E., Fiorentin, P. Re, Spagna, A., Sacco, G., Bragaglia, A., Magrini, L., Moroni, G., Alfaro, E., Franciosini, E., Morbidelli, L., Roccatagliata, V., Bouy, H., Bravi, L., Jiménez-Esteban, F., Jordi, C., Zari, E., Tautvaišiene, G., Drazdauskas, A., Mikolaitis, S., Gilmore, G., Feltzing, S., Vallenari, A., Bensby, T., Koposov, S., Korn, A., Lanzafame, A., Smiljanic, R., Bayo, A., Carraro, G., Costado, T., Heiter, U., Hourihane, A., Jofre, P., Lewis, J., Monaco, L., Prisinzano, L., Sbordone, L., Sousa, S., Worley, C., Zaggia, S., INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), M2A 2018, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Ciencies del Cosmos (ICCUB), Universitat de Barcelona (UB), Lund Observatory, Lund University [Lund], INAF - Osservatorio Astrofisico di Catania (OACT), Uppsala University, Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, and COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: parallaxes - surveys - stars: evolution - open clusters and associations: general, ComputingMilieux_MISCELLANEOUS, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience
Published: 2018

31. The Gaia-ESO survey: Calibrating a relationship between age and the [C/N] abundance ratio with open clusters

Author: Casali, G., primary, Magrini, L., additional, Tognelli, E., additional, Jackson, R., additional, Jeffries, R. D., additional, Lagarde, N., additional, Tautvaišienė, G., additional, Masseron, T., additional, Degl’Innocenti, S., additional, Prada Moroni, P. G., additional, Kordopatis, G., additional, Pancino, E., additional, Randich, S., additional, Feltzing, S., additional, Sahlholdt, C., additional, Spina, L., additional, Friel, E., additional, Roccatagliata, V., additional, Sanna, N., additional, Bragaglia, A., additional, Drazdauskas, A., additional, Mikolaitis, Š., additional, Minkevičiūtė, R., additional, Stonkutė, E., additional, Chorniy, Y., additional, Bagdonas, V., additional, Jimenez-Esteban, F., additional, Martell, S., additional, Van der Swaelmen, M., additional, Gilmore, G., additional, Vallenari, A., additional, Bensby, T., additional, Koposov, S. E., additional, Korn, A., additional, Worley, C., additional, Smiljanic, R., additional, Bergemann, M., additional, Carraro, G., additional, Damiani, F., additional, Prisinzano, L., additional, Bonito, R., additional, Franciosini, E., additional, Gonneau, A., additional, Hourihane, A., additional, Jofre, P., additional, Lewis, J., additional, Morbidelli, L., additional, Sacco, G., additional, Sousa, S. G., additional, Zaggia, S., additional, Lanzafame, A. C., additional, Heiter, U., additional, Frasca, A., additional, and Bayo, A., additional
Published: 2019
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32. The Gaia-ESO Survey: The inner disc, intermediate-age open cluster Pismis 18

Author: Hatzidimitriou, D., primary, Held, E. V., additional, Tognelli, E., additional, Bragaglia, A., additional, Magrini, L., additional, Bravi, L., additional, Gazeas, K., additional, Dapergolas, A., additional, Drazdauskas, A., additional, Delgado-Mena, E., additional, Friel, E. D., additional, Minkevičiūtė, R., additional, Sordo, R., additional, Tautvaišienė, G., additional, Gilmore, G., additional, Randich, S., additional, Feltzing, S., additional, Vallenari, A., additional, Alfaro, E. J., additional, Flaccomio, E., additional, Lanzafame, A. C., additional, Pancino, E., additional, Smiljanic, R., additional, Bayo, A., additional, Bergemann, M., additional, Carraro, G., additional, Casey, A. R., additional, Costado, M. T., additional, Damiani, F., additional, Franciosini, E., additional, Gonneau, A., additional, Jofré, P., additional, Lewis, J., additional, Monaco, L., additional, Morbidelli, L., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2019
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33. The Gaia-ESO Survey: Age spread in the star forming region NGC 6530 from the HR diagram and gravity indicators

Author: Prisinzano, L., primary, Damiani, F., additional, Kalari, V., additional, Jeffries, R., additional, Bonito, R., additional, Micela, G., additional, Wright, N. J., additional, Jackson, R. J., additional, Tognelli, E., additional, Guarcello, M. G., additional, Vink, J. S., additional, Klutsch, A., additional, Jiménez-Esteban, F. M., additional, Roccatagliata, V., additional, Tautvaišienė, G., additional, Gilmore, G., additional, Randich, S., additional, Alfaro, E. J., additional, Flaccomio, E., additional, Koposov, S., additional, Lanzafame, A., additional, Pancino, E., additional, Bergemann, M., additional, Carraro, G., additional, Franciosini, E., additional, Frasca, A., additional, Gonneau, A., additional, Hourihane, A., additional, Jofré, P., additional, Lewis, J., additional, Magrini, L., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G. G., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2019
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34. The Gaia-ESO Survey: The origin and evolution of s-process elements

Author: European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, European Science Foundation, Ministerio de Economía y Competitividad (España), European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Science and Technology Facilities Council (UK), Ministerio de Economía, Fomento y Turismo (Chile), Ministry of Science and Higher Education (Poland), Knut and Alice Wallenberg Foundation, Magrini, L., Spina, Lorenzo, Randich, S., Friel, E., Kordopatis, G., Worley, C., Pancino, E., Bragaglia, A., Donati, P., Tautvaišienė, G., Bagdonas, V., Delgado-Mena, E., Adibekyan, V., Sousa, S. G., Jiménez-Esteban, Francisco M., Sanna, N., Roccatagliata, V., Bonito, R., Sbordone, L., Duffau, S., Gilmore, Gerry, Feltzing, S., Jeffries, R.D., Vallenari, A., Alfaro, Emilio J., Bensby, T., Francois, P., Koposov, S., Korn, A.J., Recio-Blanco, A., Smiljanic, R., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Damiani, F., Franciosini, E., Frasca, A., Hourihane, A., Jofré, P., de Laverny, P., Lewis, J., Masseron, T., Monaco, L., Morbidelli, L., Prisinzano, L., Sacco, G., Zaggia, S., European Research Council, Leverhulme Trust, Istituto Nazionale di Astrofisica, European Science Foundation, Ministerio de Economía y Competitividad (España), European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Science and Technology Facilities Council (UK), Ministerio de Economía, Fomento y Turismo (Chile), Ministry of Science and Higher Education (Poland), Knut and Alice Wallenberg Foundation, Magrini, L., Spina, Lorenzo, Randich, S., Friel, E., Kordopatis, G., Worley, C., Pancino, E., Bragaglia, A., Donati, P., Tautvaišienė, G., Bagdonas, V., Delgado-Mena, E., Adibekyan, V., Sousa, S. G., Jiménez-Esteban, Francisco M., Sanna, N., Roccatagliata, V., Bonito, R., Sbordone, L., Duffau, S., Gilmore, Gerry, Feltzing, S., Jeffries, R.D., Vallenari, A., Alfaro, Emilio J., Bensby, T., Francois, P., Koposov, S., Korn, A.J., Recio-Blanco, A., Smiljanic, R., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Damiani, F., Franciosini, E., Frasca, A., Hourihane, A., Jofré, P., de Laverny, P., Lewis, J., Masseron, T., Monaco, L., Morbidelli, L., Prisinzano, L., Sacco, G., and Zaggia, S.
Abstract: Context. Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations. These trends provide important constraints on stellar and Galactic evolution and they need to be confirmed with large and statistically significant samples of stars spanning wide age and distance intervals. Aims. We aim to trace the abundance patterns and the time evolution of five s-process elements - two belonging to the first peak, Y and Zr, and three belonging to the second peak, Ba, La, and Ce - using the Gaia-ESO IDR5 results for open clusters and disc stars. Methods. From the UVES spectra of cluster member stars, we determined the average composition of clusters with ages >0.1 Gyr. We derived statistical ages and distances of field stars, and we separated them into thin and thick disc populations. We studied the time-evolution and dependence on metallicity of abundance ratios using open clusters and field stars whose parameters and abundances were derived in a homogeneous way. Results. Using our large and homogeneous sample of open clusters, thin and thick disc stars, spanning an age range larger than 10 Gyr, we confirm an increase towards young ages of s-process abundances in the solar neighbourhood. These trends are well defined for open clusters and stars located nearby the solar position and they may be explained by a late enrichment due to significant contribution to the production of these elements from long-living low-mass stars. At the same time, we find a strong dependence of the s-process abundance ratios on the Galactocentric distance and on the metallicity of the clusters and field stars. Conclusions. Our results, derived from the largest and most homogeneous sample of s-process abundances in the literature, confirm the growth with decreasing stellar ages of the s-process abundances in both field and open cluster stars. At the same time, taking advantage of the abundances of open clusters located i
Published: 2018

35. The Gaia-ESO Survey: open clusters in Gaia-DR1. A way forward to stellar age calibration

Author: European Southern Observatory, Science and Technology Facilities Council (UK), Robert Martin Ayers Sciences Fund, European Commission, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministero dell'Istruzione, dell'Università e della Ricerca, Ministerio de Economía y Competitividad (España), Swedish National Space Board, Randich, S., Tognelli, E., Jackson, R., Jeffries, R.D., Degl'Innocenti, S., Pancino, E., Re Fiorentin, P., Spagna, A., Sacco, G., Bragaglia, A., Magrini, L., Prada Moroni, P. G., Alfaro, Emilio J., Franciosini, E., Morbidelli, L., Roccatagliata, V., Bouy, Hervé, Bravi, L., Jiménez-Esteban, Francisco M., Jordi, Carme, Zari, E., Tautvaišienė, G., Drazdauskas, A., Mikolaitis, S., Gilmore, Gerry, Feltzing, S., Vallenari, A., Bensby, T., Koposov, S., Korn, A., Lanzafame, A., Smiljanic, R., Bayo, A., Carraro, G., Costado, M. T., Heiter, Ulrike, Hourihane, A., Jofré, P., Lewis, J., Monaco, L., Prisinzano, L., Sbordone, L., Sousa, S. G., Worley, C. C., Zaggia, S., European Southern Observatory, Science and Technology Facilities Council (UK), Robert Martin Ayers Sciences Fund, European Commission, Leverhulme Trust, Istituto Nazionale di Astrofisica, Ministero dell'Istruzione, dell'Università e della Ricerca, Ministerio de Economía y Competitividad (España), Swedish National Space Board, Randich, S., Tognelli, E., Jackson, R., Jeffries, R.D., Degl'Innocenti, S., Pancino, E., Re Fiorentin, P., Spagna, A., Sacco, G., Bragaglia, A., Magrini, L., Prada Moroni, P. G., Alfaro, Emilio J., Franciosini, E., Morbidelli, L., Roccatagliata, V., Bouy, Hervé, Bravi, L., Jiménez-Esteban, Francisco M., Jordi, Carme, Zari, E., Tautvaišienė, G., Drazdauskas, A., Mikolaitis, S., Gilmore, Gerry, Feltzing, S., Vallenari, A., Bensby, T., Koposov, S., Korn, A., Lanzafame, A., Smiljanic, R., Bayo, A., Carraro, G., Costado, M. T., Heiter, Ulrike, Hourihane, A., Jofré, P., Lewis, J., Monaco, L., Prisinzano, L., Sbordone, L., Sousa, S. G., Worley, C. C., and Zaggia, S.
Abstract: Context. Determination and calibration of the ages of stars, which heavily rely on stellar evolutionary models, are very challenging, while representing a crucial aspect in many astrophysical areas. Aims. We describe the methodologies that, taking advantage of Gaia-DR1 and the Gaia-ESO Survey data, enable the comparison of observed open star cluster sequences with stellar evolutionary models. The final, long-term goal is the exploitation of open clusters as age calibrators. Methods. We perform a homogeneous analysis of eight open clusters using the Gaia-DR1 TGAS catalogue for bright members and information from the Gaia-ESO Survey for fainter stars. Cluster membership probabilities for the Gaia-ESO Survey targets are derived based on several spectroscopic tracers. The Gaia-ESO Survey also provides the cluster chemical composition. We obtain cluster parallaxes using two methods. The first one relies on the astrometric selection of a sample of bona fide members, while the other one fits the parallax distribution of a larger sample of TGAS sources. Ages and reddening values are recovered through a Bayesian analysis using the 2MASS magnitudes and three sets of standard models. Lithium depletion boundary (LDB) ages are also determined using literature observations and the same models employed for the Bayesian analysis. Results. For all but one cluster, parallaxes derived by us agree with those presented in Gaia Collaboration (2017, A&A, 601, A19), while a discrepancy is found for NGC 2516; we provide evidence supporting our own determination. Inferred cluster ages are robust against models and are generally consistent with literature values. Conclusions. The systematic parallax errors inherent in the Gaia DR1 data presently limit the precision of our results. Nevertheless, we have been able to place these eight clusters onto the same age scale for the first time, with good agreement between isochronal and LDB ages where there is overlap. Our approach appears promising an
Published: 2018

36. The gaia -ESO survey: calibration strategy

Author: Pancino, E., Lardo, C., Altavilla, G., Marinoni, S., Ragaini, S., Cocozza, G., Bellazzini, M., Sabbi, E., Zoccali, M., Donati, P., Heiter, U., Koposov, S. E., Blomme, R., Morel, T., Símon-Díaz, S., Lobel, A., Soubiran, C., Montalban, J., Valentini, M., Casey, A. R., Blanco-Cuaresma, S., Jofré, P., Worley, C. C., Magrini, L., Hourihane, A., François, P., Feltzing, S., Gilmore, G., Randich, S., Asplund, M., Bonifacio, P., Drew, J. E., Jeffries, R. D., Micela, G., Vallenari, A., Alfaro, E. J., Allende Prieto, C., Babusiaux, C., Bensby, T., angela Bragaglia, Flaccomio, E., Hambly, N., Korn, A. J., Lanzafame, A. C., Smiljanic, R., Eck, S., Walton, N. A., Bayo, A., Carraro, G., Costado, M. T., Damiani, F., Edvardsson, B., Franciosini, E., Frasca, A., Lewis, J., Monaco, L., Morbidelli, L., Prisinzano, L., Sacco, G. G., Sbordone, L., Sousa, S. G., Zaggia, S., Koch, A., Ministero dell'Istruzione, dell'Università e della Ricerca, Knut and Alice Wallenberg Foundation, European Research Council, Swedish National Space Board, Belgian Science Policy Office, National Science Centre (Poland), European Science Foundation, Ministerio de Economía y Competitividad (España), Pancino E., Lardo C., Altavilla G., Marinoni S., Ragaini S., Cocozza G., Bellazzini M., Sabbi E., Zoccali M., Donati P., Heiter U., Koposov S.E., Blomme R., Morel T., Simon-Diaz S., Lobel A., Soubiran C., Montalban J., Valentini M., Casey A.R., Blanco-Cuaresma S., Jofre P., Worley C.C., Magrini L., Hourihane A., Francois P., Feltzing S., Gilmore G., Randich S., Asplund M., Bonifacio P., Drew J.E., Jeffries R.D., Micela G., Vallenari A., Alfaro E.J., Allende Prieto C., Babusiaux C., Bensby T., Bragaglia A., Flaccomio E., Hambly N., Korn A.J., Lanzafame A.C., Smiljanic R., Van Eck S., Walton N.A., Bayo A., Carraro G., Costado M.T., Damiani F., Edvardsson B., Franciosini E., Frasca A., Lewis J., Monaco L., Morbidelli L., Prisinzano L., Sacco G.G., Sbordone L., Sousa S.G., Zaggia S., Koch A., Institut national de recherche et de sécurité (Vandoeuvre lès Nancy) (INRS ( Vandoeuvre lès Nancy)), Royal Observatory of Belgium [Brussels] (ROB), Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), M2A 2017, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Leibniz-Institut für Astrophysik Potsdam (AIP), Focas Research Institute, Dublin Institute of Technology, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), School of Physics, Astronomy and Mathematics [Hatfield], University of Hertfordshire [Hatfield] (UH), INAF - Osservatorio Astronomico di Palermo (OAPa), Istituto Nazionale di Astrofisica (INAF), Economía Política y Hacienda Pública, Estadística Económica y Empresarial y Política Económica, Universidad de Castilla-La Mancha (UCLM), Department of Astronomy and Space Physics [Uppsala], Uppsala University, INAF - Osservatorio Astrofisico di Catania (OACT), Institut d'Astronomie et d'Astrophysique, Université libre de Bruxelles (ULB), University of Turin, Department of Physiology and Pharmacology, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]-Réseau International des Instituts Pasteur (RIIP)-Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, Réseau International des Instituts Pasteur (RIIP), Pôle Gérontologie, and Centre Hospitalier Universitaire de Nice (CHU Nice)
Subjects: Stars: abundance, Milky Way, FOS: Physical sciences, Techniques: spectroscopic, Astrophysics, Parameter space, Surveys, 01 natural sciences, Spectral line, surveys, 0103 physical sciences, Calibration, Emission spectrum, Survey, 010303 astronomy & astrophysics, Galaxy: general, Solar and Stellar Astrophysics (astro-ph.SR), QC, general [Galaxy], QB, Physics, [PHYS]Physics [physics], Observational error, 010308 nuclear & particles physics, Techniques: radial velocitie, Stars: abundances, Astronomy and Astrophysics, Ranging, radial velocities [techniques], [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astrophysics - Astrophysics of Galaxies, abundances [stars], Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Techniques: radial velocities, stars: abundances, techniques: spectroscopic, techniques: radial velocities, spectroscopic [techniques], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: The Gaia-ESO survey (GES) is now in its fifth and last year of observations and has produced tens of thousands of high-quality spectra of stars in all Milky Way components. This paper presents the strategy behind the selection of astrophysical calibration targets, ensuring that all GES results on radial velocities, atmospheric parameters, and chemical abundance ratios will be both internally consistent and easily comparable with other literature results, especially from other large spectroscopic surveys and from Gaia. The calibration of GES is particularly delicate because of (i) the large space of parameters covered by its targets, ranging from dwarfs to giants, from O to M stars; these targets have a large wide of metallicities and also include fast rotators, emission line objects, and stars affected by veiling; (ii) the variety of observing setups, with different wavelength ranges and resolution; and (iii) the choice of analyzing the data with many different state-of-the-art methods, each stronger in a different region of the parameter space, which ensures a better understanding of systematic uncertainties. An overview of the GES calibration and homogenization strategy is also given, along with some examples of the usage and results of calibrators in GES iDR4, which is the fourth internal GES data release and will form the basis of the next GES public data release. The agreement between GES iDR4 recommended values and reference values for the calibrating objects are very satisfactory. The average offsets and spreads are generally compatible with the GES measurement errors, which in iDR4 data already meet the requirements set by the main GES scientific goals.© ESO, 2017., This work was partly supported by the European Union FP7 program through ERC grant number 320360 and by the Leverhulme Trust through grant RPG-2012-541. We acknowledge the support from INAF and Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR) in the form of the grant >Premiale VLT 2012>. The results presented here benefit from discussions held during the Gaia-ESO workshops and conferences supported by the ESF (European Science Foundation) through the GREAT Research Network Programme. S.F. and T.B. acknowledge the support from the New Milky Way project funded by a grant from the Knut and Alice Wallenberg foundation. C.L. gratefully acknowledges financial support from the European Research Council (ERC-CoG-646928, Multi-Pop, PI: N. Bastian). U.H. and A.J.K acknowledge support from the Swedish National Space Board (Rymdstyrelsen). The research of A.L. has been subsidized by the Belgian Federal Science Policy Office under contract No. BR/143/A2/BRASS. R.S. acknowledges support by the National Science Center of Poland through grant 2014/15/B/ST9/03981. C.A.P. is thankful for support from the Spanish Ministry of Economy and Competitiveness (MINECO) through grant AYA2014-56359-P.J.M. acknowledges support from the ERC Consolidator Grant funding scheme (project STARKEY, G.A. No. 615604). T.M. acknowledges financial support from Belspo for contract PRODEX Gaia-DPAC. S.G.S acknowledges the support by Fundacao para a Ciencia e Tecnologia (FCT) through national funds and a research grant (project ref. UID/FIS/04434/2013, and PTDC/FIS-AST/7073/2014). S.G.S. also acknowledge the support from FCT through Investigador FCT contract of reference IF/00028/2014 and POPH/FSE (EC) by FEDER funding through the program >Programa Operacional de Factores de Competitividade - COMPETE>. L.S. acknowledges support by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics (MAS). M.Z. acknowledges support by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics (MAS), by Fondecyt Regular 1150345 and by the BASAL CATA PFB-06. E.J.A. and M.T.C acknowledge the financial support from the Spanish Ministerio de Economia y Competitividad, through grant AYA2013-40611-P.S.Z. acknowledge the support from the INAF grant >PRIN INAF 2014>, >Star won't tell their ages to Gaia, Galactic Archaelogy with wide-area asterosismic>.
Published: 2017

37. The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon i

Author: Sacco, G. G., Spina, L., Randich, S., Palla, F., Parker, J., Jeffries, D., Jackson, R., Meyer, R., Mapelli, M., Lanzafame, C., Bonito, R., Damiani, F., Franciosini, E., Frasca, A., Klutsch, A., Prisinzano, L., Tognelli, E., Degl’Innocenti, S., Prada Moroni, P. G., Alfaro, J., Micela, G., Prusti, T., Barrado, D., Biazzo, K., Bouy, H., Bravi, L., Lopez-Santiago, J., Wright, J., Bayo, A., Gilmore, G., Bragaglia, A., Flaccomio, E., Koposov, S. E., Pancino, E., Casey, A. R., Costado, M. T., Donati, P., Hourihane, A., Jofré, P., Lardo, C., Lewis, J., Magrini, L., Monaco, L., Morbidelli, L., Sousa, S. G., Worley, C. C., Zaggia, S., Parker, R. J., Jeffries, R. D., Meyer, M. R., Lanzafame, A. C., Degl'Innocenti, S., Alfaro, E. J., Wright, N. J., Gilmore, Gerard [0000-0003-4632-0213], Koposov, Sergey [0000-0003-2644-135X], Worley, Clare [0000-0001-9310-2898], Apollo - University of Cambridge Repository, Sacco G.G., Spina L., Randich S., Palla F., Parker R.J., Jeffries R.D., Jackson R., Meyer M.R., Mapelli M., Lanzafame A.C., Bonito R., Damiani F., Franciosini E., Frasca A., Klutsch A., Prisinzano L., Tognelli E., Degl'Innocenti S., Prada Moroni P.G., Alfaro E.J., Micela G., Prusti T., Barrado D., Biazzo K., Bouy H., Bravi L., Lopez-Santiago J., Wright N.J., Bayo A., Gilmore G., Bragaglia A., Flaccomio E., Koposov S.E., Pancino E., Casey A.R., Costado M.T., Donati P., Hourihane A., Jofre P., Lardo C., Lewis J., Magrini L., Monaco L., Morbidelli L., Sousa S.G., Worley C.C., Zaggia S., Ministero dell'Istruzione, dell'Università e della Ricerca, Istituto Nazionale di Astrofisica, European Research Council, Fundação para a Ciência e a Tecnologia (Portugal), Pôle Gérontologie, Centre Hospitalier Universitaire de Nice (CHU Nice), Muséum national d'Histoire naturelle (MNHN), Watershed Associates Ltd, Istituto di Astrofisica Spaziale e Fisica cosmica - Palermo (IASF-Pa), Istituto Nazionale di Astrofisica (INAF), University of Turin, INAF - Osservatorio Astrofisico di Catania (OACT), Economía Política y Hacienda Pública, Estadística Económica y Empresarial y Política Económica, Universidad de Castilla-La Mancha (UCLM), INAF - Osservatorio Astronomico di Palermo (OAPa), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), INAF - Osservatorio Astrofisico di Arcetri (OAA), M2A 2017, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Focas Research Institute, Dublin Institute of Technology, Institut national de recherche et de sécurité (Vandoeuvre lès Nancy) (INRS ( Vandoeuvre lès Nancy)), Hitotsubashi University, Department of Physiology and Pharmacology, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]-Réseau International des Instituts Pasteur (RIIP)-Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, Réseau International des Instituts Pasteur (RIIP), Universidade de Sao Paulo, Instituto Ocenografico, Department of Microbiology and Molecular Genetics, Michigan State University [East Lansing], Michigan State University System-Michigan State University System, Université libre de Bruxelles (ULB), and Newcastle University [Newcastle]
Subjects: astro-ph.SR, Stellar population, open clustersand associations: individual: Chamaeleon I, Individual: Chamaeleon I [Open clusters and associations], Open clusters and associations: Individual: Chamaeleon I, Stars: Kinematics and dynamics, Stars: Pre-main sequence, Techniques: Spectroscopic, astro-ph.GA, stars: kinematics and dynamics, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, stars: pre-main sequence, 01 natural sciences, Virial theorem, Kinematics and dynamics [Stars], Stars: Kinematics and dynamic, 0103 physical sciences, Cluster (physics), Mass segregation, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Stellar evolution, QC, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, QB, Physics, Pre-main sequence [Stars], open clusters and associations: individual: Chamaeleon I, 010308 nuclear & particles physics, Velocity dispersion, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], techniques: spectroscopic, Star cluster, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::Earth and Planetary Astrophysics, Spectroscopic [Techniques], Equivalent width, QB799
Abstract: Investigating the physical mechanisms driving the dynamical evolution of young star clusters is fundamental to our understanding of the star formation process and the properties of the Galactic field stars. The young (~2 Myr) and partially embedded cluster Chamaeleon I is one of the closest laboratories for the study of the early stages of star cluster dynamics in a low-density environment. The aim of this work is to study the structural and kinematical properties of this cluster combining parameters from the high-resolution spectroscopic observations of the Gaia-ESO Survey with data from the literature. Our main result is the evidence of a large discrepancy between the velocity dispersion (σ = 1.14 ± 0.35 km s) of the stellar population and the dispersion of the pre-stellar cores (~0.3 km s) derived from submillimeter observations. The origin of this discrepancy, which has been observed in other young star clusters, is not clear. It has been suggested that it may be due to either the effect of the magnetic field on the protostars and the filaments or to the dynamical evolution of stars driven by two-body interactions. Furthermore, the analysis of the kinematic properties of the stellar population puts in evidence a significant velocity shift (~1 km s) between the two subclusters located around the north and south main clouds of the cluster. This result further supports a scenario where clusters form from the evolution of multiple substructures rather than from a monolithic collapse. Using three independent spectroscopic indicators (the gravity indicator γ, the equivalent width of the Li line at 6708 Å, and the Hα 10% width), we performed a new membership selection. We found six new cluster members all located in the outer region of the cluster, proving that Chamaeleon I is probably more extended than previously thought. Starting from the positions and masses of the cluster members, we derived the level of substructure Q, the surface density Σ, and the level of mass segregation Λ of the cluster. The comparison between these structural properties and the results of N-body simulations suggests that the cluster formed in a low-density environment, in virial equilibrium or a supervirial state, and highly substructured.© 2017 ESO., This work was partly supported by the European Union FP7 programme through ERC grant number 320360 and by the Leverhulme Trust through grant RPG-2012-541. We acknowledge the support from INAF and Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR) in the form of the grant >Premiale VLT 2012>. This work has been partially supported by PRIN-INAF-2014. The results presented here benefited from discussions held during the Gaia-ESO workshops and conferences supported by the ESF (European Science Foundation) through the GREAT Research Network Programme. M.M. acknowledges financial support from the Italian Ministry of Education, University and Research (MIUR) through grant FIRB 2012 RBFR12PM1F, from INAF through grant PRIN-2014-14, and from the MERAC Foundation. S.G.S. acknowledges the support by Fundacao para a Ciencia e Tecnologia (FCT) through national funds and a research grant (project Ref. UID/FIS/04434/2013, and PTDC/FIS-AST/7073/2014). S.G.S. also acknowledge the support from FCT through Investigador FCT contract of reference IF/00028/2014 and POPH/FSE (EC) by FEDER funding through the program Programa Operacional de Factores de Competitividade COMPETE.
Published: 2017

38. The Gaia-ESO Survey: The N/O abundance ratio in the Milky Way

Author: Magrini, L., primary, Vincenzo, F., additional, Randich, S., additional, Pancino, E., additional, Casali, G., additional, Tautvaišienė, G., additional, Drazdauskas, A., additional, Mikolaitis, Š., additional, Minkevičiūtė, R., additional, Stonkutė, E., additional, Chorniy, Y., additional, Bagdonas, V., additional, Kordopatis, G., additional, Friel, E., additional, Roccatagliata, V., additional, Jiménez-Esteban, F. M., additional, Gilmore, G., additional, Vallenari, A., additional, Bensby, T., additional, Bragaglia, A., additional, Korn, A. J., additional, Lanzafame, A. C., additional, Smiljanic, R., additional, Bayo, A., additional, Casey, A. R., additional, Costado, M. T., additional, Franciosini, E., additional, Hourihane, A., additional, Jofré, P., additional, Lewis, J., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G., additional, and Worley, C., additional
Published: 2018
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39. The Gaia-ESO Survey: the origin and evolution of s-process elements

Author: Magrini, L., primary, Spina, L., additional, Randich, S., additional, Friel, E., additional, Kordopatis, G., additional, Worley, C., additional, Pancino, E., additional, Bragaglia, A., additional, Donati, P., additional, Tautvaišienė, G., additional, Bagdonas, V., additional, Delgado-Mena, E., additional, Adibekyan, V., additional, Sousa, S. G., additional, Jiménez-Esteban, F. M., additional, Sanna, N., additional, Roccatagliata, V., additional, Bonito, R., additional, Sbordone, L., additional, Duffau, S., additional, Gilmore, G., additional, Feltzing, S., additional, Jeffries, R. D., additional, Vallenari, A., additional, Alfaro, E. J., additional, Bensby, T., additional, Francois, P., additional, Koposov, S., additional, Korn, A. J., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Bayo, A., additional, Carraro, G., additional, Casey, A. R., additional, Costado, M. T., additional, Damiani, F., additional, Franciosini, E., additional, Frasca, A., additional, Hourihane, A., additional, Jofré, P., additional, de Laverny, P., additional, Lewis, J., additional, Masseron, T., additional, Monaco, L., additional, Morbidelli, L., additional, Prisinzano, L., additional, Sacco, G., additional, and Zaggia, S., additional
Published: 2018
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40. TheGaia-ESO Survey: a kinematical and dynamical study of four young open clusters

Author: Bravi, L., primary, Zari, E., additional, Sacco, G. G., additional, Randich, S., additional, Jeffries, R. D., additional, Jackson, R. J., additional, Franciosini, E., additional, Moraux, E., additional, López-Santiago, J., additional, Pancino, E., additional, Spina, L., additional, Wright, N. J., additional, Jiménez-Esteban, F. M., additional, Klutsch, A., additional, Roccatagliata, V., additional, Gilmore, G., additional, Bragaglia, A., additional, Flaccomio, E., additional, Francois, P., additional, Koposov, S. E., additional, Bayo, A., additional, Carraro, G., additional, Costado, M. T., additional, Damiani, F., additional, Frasca, A., additional, Hourihane, A., additional, Jofré, P., additional, Lardo, C., additional, Lewis, J., additional, Magrini, L., additional, Morbidelli, L., additional, Prisinzano, L., additional, Sousa, S. G., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2018
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41. TheGaia-ESO Survey: open clusters inGaia-DR1

Author: Randich, S., primary, Tognelli, E., additional, Jackson, R., additional, Jeffries, R. D., additional, Degl’Innocenti, S., additional, Pancino, E., additional, Fiorentin, P. Re, additional, Spagna, A., additional, Sacco, G., additional, Bragaglia, A., additional, Magrini, L., additional, Prada Moroni, P. G., additional, Alfaro, E., additional, Franciosini, E., additional, Morbidelli, L., additional, Roccatagliata, V., additional, Bouy, H., additional, Bravi, L., additional, Jiménez-Esteban, F. M., additional, Jordi, C., additional, Zari, E., additional, Tautvaišiene, G., additional, Drazdauskas, A., additional, Mikolaitis, S., additional, Gilmore, G., additional, Feltzing, S., additional, Vallenari, A., additional, Bensby, T., additional, Koposov, S., additional, Korn, A., additional, Lanzafame, A., additional, Smiljanic, R., additional, Bayo, A., additional, Carraro, G., additional, Costado, M. T., additional, Heiter, U., additional, Hourihane, A., additional, Jofré, P., additional, Lewis, J., additional, Monaco, L., additional, Prisinzano, L., additional, Sbordone, L., additional, Sousa, S. G., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2018
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42. The Gaia-ESO Survey: Churning through the Milky Way

Author: Hayden, M. R., primary, Recio-Blanco, A., additional, de Laverny, P., additional, Mikolaitis, S., additional, Guiglion, G., additional, Hill, V., additional, Gilmore, G., additional, Randich, S., additional, Bayo, A., additional, Bensby, T., additional, Bergemann, M., additional, Bragaglia, A., additional, Casey, A., additional, Costado, M., additional, Feltzing, S., additional, Franciosini, E., additional, Hourihane, A., additional, Jofre, P., additional, Koposov, S., additional, Kordopatis, G., additional, Lanzafame, A., additional, Lardo, C., additional, Lewis, J., additional, Lind, K., additional, Magrini, L., additional, Monaco, L., additional, Morbidelli, L., additional, Pancino, E., additional, Sacco, G., additional, Stonkute, E., additional, Worley, C. C., additional, and Zwitter, T., additional
Published: 2018
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43. TheGaia-ESO Survey: double-, triple-, and quadruple-line spectroscopic binary candidates

Author: Merle, T., primary, Van Eck, S., additional, Jorissen, A., additional, Van der Swaelmen, M., additional, Masseron, T., additional, Zwitter, T., additional, Hatzidimitriou, D., additional, Klutsch, A., additional, Pourbaix, D., additional, Blomme, R., additional, Worley, C. C., additional, Sacco, G., additional, Lewis, J., additional, Abia, C., additional, Traven, G., additional, Sordo, R., additional, Bragaglia, A., additional, Smiljanic, R., additional, Pancino, E., additional, Damiani, F., additional, Hourihane, A., additional, Gilmore, G., additional, Randich, S., additional, Koposov, S., additional, Casey, A., additional, Morbidelli, L., additional, Franciosini, E., additional, Magrini, L., additional, Jofre, P., additional, Costado, M. T., additional, Jeffries, R. D., additional, Bergemann, M., additional, Lanzafame, A. C., additional, Bayo, A., additional, Carraro, G., additional, Flaccomio, E., additional, Monaco, L., additional, and Zaggia, S., additional
Published: 2017
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44. The AMBRE project: The thick thin disk and thin thick disk of the Milky Way

Author: Hayden, M. R., primary, Recio-Blanco, A., additional, de Laverny, P., additional, Mikolaitis, S., additional, and Worley, C. C., additional
Published: 2017
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45. Gaia-ESO Survey: Global properties of clusters Trumpler 14 and 16 in the Carina nebula

Author: European Research Council, Leverhulme Trust, Damiani, F., Klutsch, A., Jeffries, R.D., Randich, S., Prisinzano, L., Maíz Apellániz, Jesús, Micela, Giusi, Kalari, V., Frasca, A., Zwitter, T., Bonito, R., Gilmore, Gerry, Flaccomio, E., Francois, P., Koposov, S., Lanzafame, A.C., Sacco, G. G., Bayo, A., Carraro, G., Casey, A. R., Alfaro, Emilio J., Costado, M. T., Donati, P., Franciosini, E., Hourihane, A., Jofré, P., Lardo, C., Lewis, J., Magrini, L., Monaco, L., Morbidelli, L., Worley, C. C., Vink, J. S., Zaggia, S., European Research Council, Leverhulme Trust, Damiani, F., Klutsch, A., Jeffries, R.D., Randich, S., Prisinzano, L., Maíz Apellániz, Jesús, Micela, Giusi, Kalari, V., Frasca, A., Zwitter, T., Bonito, R., Gilmore, Gerry, Flaccomio, E., Francois, P., Koposov, S., Lanzafame, A.C., Sacco, G. G., Bayo, A., Carraro, G., Casey, A. R., Alfaro, Emilio J., Costado, M. T., Donati, P., Franciosini, E., Hourihane, A., Jofré, P., Lardo, C., Lewis, J., Magrini, L., Monaco, L., Morbidelli, L., Worley, C. C., Vink, J. S., and Zaggia, S.
Abstract: Aims: We present the first extensive spectroscopic study of the global population in star clusters Trumpler 16, Trumpler 14, and Collinder 232 in the Carina nebula, using data from the Gaia-ESO Survey, down to solar-mass stars. Methods: In addition to the standard homogeneous survey data reduction, a special processing was applied here because of the bright nebulosity surrounding Carina stars. Results: We find about 400 good candidate members ranging from OB types down to slightly subsolar masses. About 100 heavily reddened early-type Carina members found here were previously unrecognized or poorly classified, including two candidate O stars and several candidate Herbig Ae/Be stars. Their large brightness makes them useful tracers of the obscured Carina population. The spectroscopically derived temperatures for nearly 300 low-mass members enables the inference of individual extinction values and the study of the relative placement of stars along the line of sight. Conclusions: We find a complex spatial structure with definite clustering of low-mass members around the most massive stars and spatially variable extinction. By combining the new data with existing X-ray data, we obtain a more complete picture of the three-dimensional spatial structure of the Carina clusters and of their connection to bright and dark nebulosity and UV sources. The identification of tens of background giants also enables us to determine the total optical depth of the Carina nebula along many sightlines. We are also able to put constraints on the star formation history of the region with Trumpler 14 stars found to be systematically younger than stars in other subclusters. We find a large percentage of fast-rotating stars among Carina solar-mass members, which provide new constraints on the rotational evolution of pre-main-sequence stars in this mass range.© 2017 ESO.
Published: 2017

46. The Gaia-ESO Survey: A lithium-rotation connection at 5 Myr?

Author: Delgado Mena, E., Carraro, G., Lanzafame, A., Zwitter, T., Zaggia, S., Worley, C., Vallenari, A., Sousa, S., Sbordone, L., Sacco, G., Prisinzano, L., Morbidelli, L., Monaco, L., Magrini, L., Lewis, J., Lardo, C., Koposov, S., Hourihane, A., Franciosini, E., Donati, P., Mena, E., Damiani, F., Costado, M., Casey, A., Carraro, C., Bragaglia, A., Bensby, T., Bayo, A., Gilmore, G., Flaccomio, E., Cody, A., Stauffer, J., Randich, S., Micela, G., Messina, S., Biazzo, K., Moraux, E., Frasca, A., Jeffries, R., Klutsch, A., Venuti, L., Bouvier, J., Bouvier J., Lanzafame A.C., Venuti L., Klutsch A., Jeffries R., Frasca A., Moraux E., Biazzo K., Messina S., Micela G., Randich S., Stauffer J., Cody A.M., Flaccomio E., Gilmore G., Bayo A., Bensby T., Bragaglia A., Carraro G., Casey A., Costado M.T., Damiani F., Delgado Mena E., Donati P., Franciosini E., Hourihane A., Koposov S., Lardo C., Lewis J., Magrini L., Monaco L., Morbidelli L., Prisinzano L., Sacco G., Sbordone L., Sousa S.G., Vallenari A., Worley C.C., Zaggia S., Zwitter T., Gilmore, Gerard [0000-0003-4632-0213], Casey, Andrew [0000-0003-0174-0564], Koposov, Sergey [0000-0003-2644-135X], Worley, Clare [0000-0001-9310-2898], and Apollo - University of Cambridge Repository
Subjects: stars: abundances / stars: pre-main sequence / stars: rotation / open clusters and associations: individual: NGC 2264, Stars: abundance, astro-ph.SR, stars: abundances, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Rotation, 01 natural sciences, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Stellar evolution, Open clusters and associations: individual: NGC 2264, Stars: abundances, Stars: pre-main sequence, Stars: rotation, Astronomy and Astrophysics, Space and Planetary Science, Solar and Stellar Astrophysics (astro-ph.SR), QC, Astrophysics::Galaxy Astrophysics, QB, Physics, 010308 nuclear & particles physics, Radius, Accretion (astrophysics), Stars, Astrophysics - Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Pleiades, Equivalent width, QB799
Abstract: We investigate here the lithium content of young low-mass stars in the 5~Myr-old star forming region NGC~2264 and its relationship with rotation. We combine lithium equivalent width measurements, EW(Li), from the Gaia-ESO Survey with the determination of rotational periods from the CSI~2264 survey. We consider only bona fide non accreting cluster members in order to minimize uncertainties on EW(Li). We report the existence of a relationship between lithium content and rotation in NGC~2264 at an age of 5~Myr. The Li-rotation connection is seen over a restricted temperature range, Teff=3800--4400K, where fast rotators are Li-rich compared to slow ones. This correlation is similar to, albeit of lower amplitude than, the Li-rotation connection previously reported for K dwarfs in the 125 Myr-old Pleiades cluster. We investigate whether the non-standard pre-main sequence models developed so far to explain the Pleiades results, which are based on episodic accretion, pre-main sequence core-envelope decoupling, and/or radius inflation due to enhanced magnetic activity, can account for an early development of the Li-rotation connection. While radius inflation appears to be the most promising possibility, each of these models has issues. We therefore also discuss external causes that might operate during the first few Myr of pre-main sequence evolution, such as planet engulfment and/or steady disk accretion, as possible candidates for the common origin for Li-excess and fast rotation in young low-mass pre-main sequence stars. The emergence of a connection between lithium content and rotation rate at such an early age as 5~Myr suggests a complex link between accretion processes, early angular momentum evolution, and possibly planet formation, which likely impacts early stellar evolution and still is to be fully deciphered., Comment: 9 pages, 5 figures, Astronomy & Astrophysics, in press
Published: 2016

47. The AMBRE project: a study of Li evolution in the Galactic thin and thick discs

Author: Prantzos, N., primary, de Laverny, P., additional, Guiglion, G., additional, Recio-Blanco, A., additional, and Worley, C. C., additional
Published: 2017
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48. TheGaia-ESO Survey: Galactic evolution of sulphur and zinc

Author: Duffau, S., primary, Caffau, E., additional, Sbordone, L., additional, Bonifacio, P., additional, Andrievsky, S., additional, Korotin, S., additional, Babusiaux, C., additional, Salvadori, S., additional, Monaco, L., additional, François, P., additional, Skúladóttir, Á., additional, Bragaglia, A., additional, Donati, P., additional, Spina, L., additional, Gallagher, A. J., additional, Ludwig, H.-G., additional, Christlieb, N., additional, Hansen, C. J., additional, Mott, A., additional, Steffen, M., additional, Zaggia, S., additional, Blanco-Cuaresma, S., additional, Calura, F., additional, Friel, E., additional, Jiménez-Esteban, F. M., additional, Koch, A., additional, Magrini, L., additional, Pancino, E., additional, Tang, B., additional, Tautvaišienė, G., additional, Vallenari, A., additional, Hawkins, K., additional, Gilmore, G., additional, Randich, S., additional, Feltzing, S., additional, Bensby, T., additional, Flaccomio, E., additional, Smiljanic, R., additional, Bayo, A., additional, Carraro, G., additional, Casey, A. R., additional, Costado, M. T., additional, Damiani, F., additional, Franciosini, E., additional, Hourihane, A., additional, Jofré, P., additional, Lardo, C., additional, Lewis, J., additional, Morbidelli, L., additional, Sousa, S. G., additional, and Worley, C. C., additional
Published: 2017
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49. Gaia-ESO Survey: Global properties of clusters Trumpler 14 and 16 in the Carina nebula

Author: Damiani, F., primary, Klutsch, A., additional, Jeffries, R. D., additional, Randich, S., additional, Prisinzano, L., additional, Maíz Apellániz, J., additional, Micela, G., additional, Kalari, V., additional, Frasca, A., additional, Zwitter, T., additional, Bonito, R., additional, Gilmore, G., additional, Flaccomio, E., additional, Francois, P., additional, Koposov, S., additional, Lanzafame, A. C., additional, Sacco, G. G., additional, Bayo, A., additional, Carraro, G., additional, Casey, A. R., additional, Alfaro, E. J., additional, Costado, M. T., additional, Donati, P., additional, Franciosini, E., additional, Hourihane, A., additional, Jofré, P., additional, Lardo, C., additional, Lewis, J., additional, Magrini, L., additional, Monaco, L., additional, Morbidelli, L., additional, Worley, C. C., additional, Vink, J. S., additional, and Zaggia, S., additional
Published: 2017
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50. TheGaia-ESO Survey: radial distribution of abundances in the Galactic disc from open clusters and young-field stars

Author: Magrini, L., primary, Randich, S., additional, Kordopatis, G., additional, Prantzos, N., additional, Romano, D., additional, Chieffi, A., additional, Limongi, M., additional, François, P., additional, Pancino, E., additional, Friel, E., additional, Bragaglia, A., additional, Tautvaišienė, G., additional, Spina, L., additional, Overbeek, J., additional, Cantat-Gaudin, T., additional, Donati, P., additional, Vallenari, A., additional, Sordo, R., additional, Jiménez-Esteban, F. M., additional, Tang, B., additional, Drazdauskas, A., additional, Sousa, S., additional, Duffau, S., additional, Jofré, P., additional, Gilmore, G., additional, Feltzing, S., additional, Alfaro, E., additional, Bensby, T., additional, Flaccomio, E., additional, Koposov, S., additional, Lanzafame, A., additional, Smiljanic, R., additional, Bayo, A., additional, Carraro, G., additional, Casey, A. R., additional, Costado, M. T., additional, Damiani, F., additional, Franciosini, E., additional, Hourihane, A., additional, Lardo, C., additional, Lewis, J., additional, Monaco, L., additional, Morbidelli, L., additional, Sacco, G., additional, Sbordone, L., additional, Worley, C. C., additional, and Zaggia, S., additional
Published: 2017
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