The Gaia-ESO survey

Calibrating a relationship between age and the [C/N] abundance ratio with open clusters?

G. Casali, L. Magrini, E. Tognelli, R. Jackson, R. D. Jeffries, N. Lagarde, G. Tautvaišiene, T. Masseron, S. Degl'Innocenti, P. G. Prada Moroni, G. Kordopatis, E. Pancino, S. Randich, S. Feltzing, C. Sahlholdt, L. Spina, E. Friel, V. Roccatagliata, N. Sanna, A. Bragaglia & 34 others A. Drazdauskas, S Mikolaitis, R. Minkevičiūte, E. Stonkute, Y. Chorniy, V. Bagdonas, F. Jimenez-Esteban, S. Martell, M. Van Der Swaelmen, G. Gilmore, A. Vallenari, T. Bensby, S. E. Koposov, A. Korn, C. Worley, R. Smiljanic, M. Bergemann, G. Carraro, F. Damiani, L. Prisinzano, R. Bonito, E. Franciosini, A. Gonneau, A. Hourihane, P. Jofre, J. Lewis, L. Morbidelli, G. Sacco, S. G. Sousa, S. Zaggia, A. C. Lanzafame, U. Heiter, A. Frasca, A. Bayo

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Context. In the era of large high-resolution spectroscopic surveys such as Gaia-ESO and APOGEE, high-quality spectra can contribute to our understanding of the Galactic chemical evolution by providing abundances of elements that belong to the different nucleosynthesis channels, and also by providing constraints to one of the most elusive astrophysical quantities: stellar age. Aims. Some abundance ratios, such as [C/N], have been proven to be excellent indicators of stellar ages. We aim at providing an empirical relationship between stellar ages and [C/N] using open star clusters, observed by the Gaia-ESO and APOGEE surveys, as calibrators. Methods. We used stellar parameters and abundances from the Gaia-ESO Survey and APOGEE Survey of the Galactic field and open cluster stars. Ages of star clusters were retrieved from the literature sources and validated using a common set of isochrones. We used the same isochrones to determine for each age and metallicity the surface gravity at which the first dredge-up and red giant branch bump occur. We studied the effect of extra-mixing processes in our sample of giant stars, and we derived the mean [C/N] in evolved stars, including only stars without evidence of extra mixing. By combining the Gaia-ESO and APOGEE samples of open clusters, we derived a linear relationship between [C/N] and (logarithmic) cluster ages. Results. We apply our relationship to selected giant field stars in the Gaia-ESO and APOGEE surveys. We find an age separation between thin- and thick-disc stars and age trends within their populations, with an increasing age towards lower metallicity populations. Conclusions. With this empirical relationship, we are able to provide an age estimate for giant stars in which C and N abundances are measured. For giant stars, the isochrone fitting method is indeed less sensitive than for dwarf stars at the turn-off. Our method can therefore be considered as an additional tool to give an independent estimate of the age of giant stars. The uncertainties in their ages is similar to those obtained using isochrone fitting for dwarf stars.

Original languageEnglish
Article numberA62
Number of pages26
JournalAstronomy and Astrophysics
Volume629
DOIs
Publication statusPublished - Sep 2019

Keywords

  • Galaxy: abundances
  • Galaxy: disk
  • Open clusters and associations: general

Cite this

Casali, G. ; Magrini, L. ; Tognelli, E. ; Jackson, R. ; Jeffries, R. D. ; Lagarde, N. ; Tautvaišiene, G. ; Masseron, T. ; Degl'Innocenti, S. ; Prada Moroni, P. G. ; Kordopatis, G. ; Pancino, E. ; Randich, S. ; Feltzing, S. ; Sahlholdt, C. ; Spina, L. ; Friel, E. ; Roccatagliata, V. ; Sanna, N. ; Bragaglia, A. ; Drazdauskas, A. ; Mikolaitis, S ; Minkevičiūte, R. ; Stonkute, E. ; Chorniy, Y. ; Bagdonas, V. ; Jimenez-Esteban, F. ; Martell, S. ; Van Der Swaelmen, M. ; Gilmore, G. ; Vallenari, A. ; Bensby, T. ; Koposov, S. E. ; Korn, A. ; Worley, C. ; Smiljanic, R. ; Bergemann, M. ; Carraro, G. ; Damiani, F. ; Prisinzano, L. ; Bonito, R. ; Franciosini, E. ; Gonneau, A. ; Hourihane, A. ; Jofre, P. ; Lewis, J. ; Morbidelli, L. ; Sacco, G. ; Sousa, S. G. ; Zaggia, S. ; Lanzafame, A. C. ; Heiter, U. ; Frasca, A. ; Bayo, A. / The Gaia-ESO survey : Calibrating a relationship between age and the [C/N] abundance ratio with open clusters?. In: Astronomy and Astrophysics. 2019 ; Vol. 629.
@article{0c5fdecc476b4a0ca32bfc0f46b796be,
title = "The Gaia-ESO survey: Calibrating a relationship between age and the [C/N] abundance ratio with open clusters?",
abstract = "Context. In the era of large high-resolution spectroscopic surveys such as Gaia-ESO and APOGEE, high-quality spectra can contribute to our understanding of the Galactic chemical evolution by providing abundances of elements that belong to the different nucleosynthesis channels, and also by providing constraints to one of the most elusive astrophysical quantities: stellar age. Aims. Some abundance ratios, such as [C/N], have been proven to be excellent indicators of stellar ages. We aim at providing an empirical relationship between stellar ages and [C/N] using open star clusters, observed by the Gaia-ESO and APOGEE surveys, as calibrators. Methods. We used stellar parameters and abundances from the Gaia-ESO Survey and APOGEE Survey of the Galactic field and open cluster stars. Ages of star clusters were retrieved from the literature sources and validated using a common set of isochrones. We used the same isochrones to determine for each age and metallicity the surface gravity at which the first dredge-up and red giant branch bump occur. We studied the effect of extra-mixing processes in our sample of giant stars, and we derived the mean [C/N] in evolved stars, including only stars without evidence of extra mixing. By combining the Gaia-ESO and APOGEE samples of open clusters, we derived a linear relationship between [C/N] and (logarithmic) cluster ages. Results. We apply our relationship to selected giant field stars in the Gaia-ESO and APOGEE surveys. We find an age separation between thin- and thick-disc stars and age trends within their populations, with an increasing age towards lower metallicity populations. Conclusions. With this empirical relationship, we are able to provide an age estimate for giant stars in which C and N abundances are measured. For giant stars, the isochrone fitting method is indeed less sensitive than for dwarf stars at the turn-off. Our method can therefore be considered as an additional tool to give an independent estimate of the age of giant stars. The uncertainties in their ages is similar to those obtained using isochrone fitting for dwarf stars.",
keywords = "Galaxy: abundances, Galaxy: disk, Open clusters and associations: general",
author = "G. Casali and L. Magrini and E. Tognelli and R. Jackson and Jeffries, {R. D.} and N. Lagarde and G. Tautvaišiene and T. Masseron and S. Degl'Innocenti and {Prada Moroni}, {P. G.} and G. Kordopatis and E. Pancino and S. Randich and S. Feltzing and C. Sahlholdt and L. Spina and E. Friel and V. Roccatagliata and N. Sanna and A. Bragaglia and A. Drazdauskas and S Mikolaitis and R. Minkevičiūte and E. Stonkute and Y. Chorniy and V. Bagdonas and F. Jimenez-Esteban and S. Martell and {Van Der Swaelmen}, M. and G. Gilmore and A. Vallenari and T. Bensby and Koposov, {S. E.} and A. Korn and C. Worley and R. Smiljanic and M. Bergemann and G. Carraro and F. Damiani and L. Prisinzano and R. Bonito and E. Franciosini and A. Gonneau and A. Hourihane and P. Jofre and J. Lewis and L. Morbidelli and G. Sacco and Sousa, {S. G.} and S. Zaggia and Lanzafame, {A. C.} and U. Heiter and A. Frasca and A. Bayo",
year = "2019",
month = "9",
doi = "10.1051/0004-6361/201935282",
language = "English",
volume = "629",
journal = "Astronomy and Astrophysics: a European journal",
issn = "0004-6361",

}

Casali, G, Magrini, L, Tognelli, E, Jackson, R, Jeffries, RD, Lagarde, N, Tautvaišiene, G, Masseron, T, Degl'Innocenti, S, Prada Moroni, PG, Kordopatis, G, Pancino, E, Randich, S, Feltzing, S, Sahlholdt, C, Spina, L, Friel, E, Roccatagliata, V, Sanna, N, Bragaglia, A, Drazdauskas, A, Mikolaitis, S, Minkevičiūte, R, Stonkute, E, Chorniy, Y, Bagdonas, V, Jimenez-Esteban, F, Martell, S, Van Der Swaelmen, M, Gilmore, G, Vallenari, A, Bensby, T, Koposov, SE, Korn, A, Worley, C, Smiljanic, R, Bergemann, M, Carraro, G, Damiani, F, Prisinzano, L, Bonito, R, Franciosini, E, Gonneau, A, Hourihane, A, Jofre, P, Lewis, J, Morbidelli, L, Sacco, G, Sousa, SG, Zaggia, S, Lanzafame, AC, Heiter, U, Frasca, A & Bayo, A 2019, 'The Gaia-ESO survey: Calibrating a relationship between age and the [C/N] abundance ratio with open clusters?', Astronomy and Astrophysics, vol. 629, A62. https://doi.org/10.1051/0004-6361/201935282

The Gaia-ESO survey : Calibrating a relationship between age and the [C/N] abundance ratio with open clusters? / Casali, G.; Magrini, L.; Tognelli, E.; Jackson, R.; Jeffries, R. D.; Lagarde, N.; Tautvaišiene, G.; Masseron, T.; Degl'Innocenti, S.; Prada Moroni, P. G.; Kordopatis, G.; Pancino, E.; Randich, S.; Feltzing, S.; Sahlholdt, C.; Spina, L.; Friel, E.; Roccatagliata, V.; Sanna, N.; Bragaglia, A.; Drazdauskas, A.; Mikolaitis, S; Minkevičiūte, R.; Stonkute, E.; Chorniy, Y.; Bagdonas, V.; Jimenez-Esteban, F.; Martell, S.; Van Der Swaelmen, M.; Gilmore, G.; Vallenari, A.; Bensby, T.; Koposov, S. E.; Korn, A.; Worley, C.; Smiljanic, R.; Bergemann, M.; Carraro, G.; Damiani, F.; Prisinzano, L.; Bonito, R.; Franciosini, E.; Gonneau, A.; Hourihane, A.; Jofre, P.; Lewis, J.; Morbidelli, L.; Sacco, G.; Sousa, S. G.; Zaggia, S.; Lanzafame, A. C.; Heiter, U.; Frasca, A.; Bayo, A.

In: Astronomy and Astrophysics, Vol. 629, A62, 09.2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The Gaia-ESO survey

T2 - Calibrating a relationship between age and the [C/N] abundance ratio with open clusters?

AU - Casali, G.

AU - Magrini, L.

AU - Tognelli, E.

AU - Jackson, R.

AU - Jeffries, R. D.

AU - Lagarde, N.

AU - Tautvaišiene, G.

AU - Masseron, T.

AU - Degl'Innocenti, S.

AU - Prada Moroni, P. G.

AU - Kordopatis, G.

AU - Pancino, E.

AU - Randich, S.

AU - Feltzing, S.

AU - Sahlholdt, C.

AU - Spina, L.

AU - Friel, E.

AU - Roccatagliata, V.

AU - Sanna, N.

AU - Bragaglia, A.

AU - Drazdauskas, A.

AU - Mikolaitis, S

AU - Minkevičiūte, R.

AU - Stonkute, E.

AU - Chorniy, Y.

AU - Bagdonas, V.

AU - Jimenez-Esteban, F.

AU - Martell, S.

AU - Van Der Swaelmen, M.

AU - Gilmore, G.

AU - Vallenari, A.

AU - Bensby, T.

AU - Koposov, S. E.

AU - Korn, A.

AU - Worley, C.

AU - Smiljanic, R.

AU - Bergemann, M.

AU - Carraro, G.

AU - Damiani, F.

AU - Prisinzano, L.

AU - Bonito, R.

AU - Franciosini, E.

AU - Gonneau, A.

AU - Hourihane, A.

AU - Jofre, P.

AU - Lewis, J.

AU - Morbidelli, L.

AU - Sacco, G.

AU - Sousa, S. G.

AU - Zaggia, S.

AU - Lanzafame, A. C.

AU - Heiter, U.

AU - Frasca, A.

AU - Bayo, A.

PY - 2019/9

Y1 - 2019/9

N2 - Context. In the era of large high-resolution spectroscopic surveys such as Gaia-ESO and APOGEE, high-quality spectra can contribute to our understanding of the Galactic chemical evolution by providing abundances of elements that belong to the different nucleosynthesis channels, and also by providing constraints to one of the most elusive astrophysical quantities: stellar age. Aims. Some abundance ratios, such as [C/N], have been proven to be excellent indicators of stellar ages. We aim at providing an empirical relationship between stellar ages and [C/N] using open star clusters, observed by the Gaia-ESO and APOGEE surveys, as calibrators. Methods. We used stellar parameters and abundances from the Gaia-ESO Survey and APOGEE Survey of the Galactic field and open cluster stars. Ages of star clusters were retrieved from the literature sources and validated using a common set of isochrones. We used the same isochrones to determine for each age and metallicity the surface gravity at which the first dredge-up and red giant branch bump occur. We studied the effect of extra-mixing processes in our sample of giant stars, and we derived the mean [C/N] in evolved stars, including only stars without evidence of extra mixing. By combining the Gaia-ESO and APOGEE samples of open clusters, we derived a linear relationship between [C/N] and (logarithmic) cluster ages. Results. We apply our relationship to selected giant field stars in the Gaia-ESO and APOGEE surveys. We find an age separation between thin- and thick-disc stars and age trends within their populations, with an increasing age towards lower metallicity populations. Conclusions. With this empirical relationship, we are able to provide an age estimate for giant stars in which C and N abundances are measured. For giant stars, the isochrone fitting method is indeed less sensitive than for dwarf stars at the turn-off. Our method can therefore be considered as an additional tool to give an independent estimate of the age of giant stars. The uncertainties in their ages is similar to those obtained using isochrone fitting for dwarf stars.

AB - Context. In the era of large high-resolution spectroscopic surveys such as Gaia-ESO and APOGEE, high-quality spectra can contribute to our understanding of the Galactic chemical evolution by providing abundances of elements that belong to the different nucleosynthesis channels, and also by providing constraints to one of the most elusive astrophysical quantities: stellar age. Aims. Some abundance ratios, such as [C/N], have been proven to be excellent indicators of stellar ages. We aim at providing an empirical relationship between stellar ages and [C/N] using open star clusters, observed by the Gaia-ESO and APOGEE surveys, as calibrators. Methods. We used stellar parameters and abundances from the Gaia-ESO Survey and APOGEE Survey of the Galactic field and open cluster stars. Ages of star clusters were retrieved from the literature sources and validated using a common set of isochrones. We used the same isochrones to determine for each age and metallicity the surface gravity at which the first dredge-up and red giant branch bump occur. We studied the effect of extra-mixing processes in our sample of giant stars, and we derived the mean [C/N] in evolved stars, including only stars without evidence of extra mixing. By combining the Gaia-ESO and APOGEE samples of open clusters, we derived a linear relationship between [C/N] and (logarithmic) cluster ages. Results. We apply our relationship to selected giant field stars in the Gaia-ESO and APOGEE surveys. We find an age separation between thin- and thick-disc stars and age trends within their populations, with an increasing age towards lower metallicity populations. Conclusions. With this empirical relationship, we are able to provide an age estimate for giant stars in which C and N abundances are measured. For giant stars, the isochrone fitting method is indeed less sensitive than for dwarf stars at the turn-off. Our method can therefore be considered as an additional tool to give an independent estimate of the age of giant stars. The uncertainties in their ages is similar to those obtained using isochrone fitting for dwarf stars.

KW - Galaxy: abundances

KW - Galaxy: disk

KW - Open clusters and associations: general

UR - http://www.scopus.com/inward/record.url?scp=85072174588&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201935282

DO - 10.1051/0004-6361/201935282

M3 - Article

VL - 629

JO - Astronomy and Astrophysics: a European journal

JF - Astronomy and Astrophysics: a European journal

SN - 0004-6361

M1 - A62

ER -