The Gaia-ESO Survey: Insights into the inner-disc evolution from open clusters

L. Magrini, S. Randich, P. Donati, A. Bragaglia, V. Adibekyan, D. Romano, R. Smiljanic, S. Blanco-Cuaresma, G. Tautvaišiene, E. Friel, J. Overbeek, H. Jacobson, T. Cantat-Gaudin, A. Vallenari, R. Sordo, E. Pancino, D. Geisler, I. San Roman, S. Villanova, A. CaseyA. Hourihane, C. C. Worley, P. Francois, G. Gilmore, T. Bensby, E. Flaccomio, A. J. Korn, A. Recio-Blanco, G. Carraro, M. T. Costado, E. Franciosini, U. Heiter, P. Jofré, C. Lardo, P. De Laverny, L. Monaco, L. Morbidelli, G. Sacco, S. G. Sousa, S. Zaggia

Resultado de la investigación: Review article

29 Citas (Scopus)

Resumen

Context. The inner disc, which links the thin disc with the bulge, has been somewhat neglected in the past because of the intrinsic difficulties in its study, among which crowding and high extinction. Open clusters located in the inner disc are among thebest tracers of its chemistry at different ages and distances. Aims. We analyse the chemical patterns of four open clusters located within 7 kpc of the Galactic centre and of field stars to infer the properties of the inner disc with the Gaia-ESO survey idr2/3 data release. Methods. We derive the parameters of the newly observed cluster, Berkeley 81, finding an age of about 1 Gyr and a Galactocentric distance of ∼5.4 kpc. We construct the chemical patterns of clusters and we compare them with those of field stars in the solar neighbourhood and in the inner-disc samples. Results. Comparing the three populations we observe that inner-disc clusters and field stars are both, on average, enhanced in [O/Fe], [Mg/Fe], and [Si/Fe]. Using the idr2/3 results of M67, we estimate the non-local thermodynamic equilibrium (NLTE) effect on the abundances of Mg and Si in giant stars. After empirically correcting for NLTE effects, we note that NGC 6705 and Be 81 still have a high [α/Fe]. Conclusions. The location of the four open clusters and of the field population reveals that the evolution of the metallicity [Fe/H] and of [α/Fe] can be explained within the framework of a simple chemical evolution model: both [Fe/H] and [α/Fe] of Trumpler 20 and of NGC 4815 are in agreement with expectations from a simple chemical evolution model. On the other hand, NGC 6705, and to a lesser degree Berkeley 81, have higher [α/Fe] than expected for their ages, location in the disc, and metallicity. These differences might originate from local enrichment processes as explained in the inhomogeneous evolution framework.

Idioma originalEnglish
Número de artículoA85
PublicaciónAstronomy and Astrophysics
Volumen580
DOI
EstadoPublished - 1 ago 2015

Huella dactilar

open clusters
European Southern Observatory
star distribution
thermodynamics
chemical evolution
thermodynamic equilibrium
metallicity
extinction
tracer
giant stars
crowding
solar neighborhood
star clusters
chemical
tracers
chemistry
estimates
effect

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Magrini, L., Randich, S., Donati, P., Bragaglia, A., Adibekyan, V., Romano, D., ... Zaggia, S. (2015). The Gaia-ESO Survey: Insights into the inner-disc evolution from open clusters. Astronomy and Astrophysics, 580, [A85]. https://doi.org/10.1051/0004-6361/201526305
Magrini, L. ; Randich, S. ; Donati, P. ; Bragaglia, A. ; Adibekyan, V. ; Romano, D. ; Smiljanic, R. ; Blanco-Cuaresma, S. ; Tautvaišiene, G. ; Friel, E. ; Overbeek, J. ; Jacobson, H. ; Cantat-Gaudin, T. ; Vallenari, A. ; Sordo, R. ; Pancino, E. ; Geisler, D. ; San Roman, I. ; Villanova, S. ; Casey, A. ; Hourihane, A. ; Worley, C. C. ; Francois, P. ; Gilmore, G. ; Bensby, T. ; Flaccomio, E. ; Korn, A. J. ; Recio-Blanco, A. ; Carraro, G. ; Costado, M. T. ; Franciosini, E. ; Heiter, U. ; Jofré, P. ; Lardo, C. ; De Laverny, P. ; Monaco, L. ; Morbidelli, L. ; Sacco, G. ; Sousa, S. G. ; Zaggia, S. / The Gaia-ESO Survey : Insights into the inner-disc evolution from open clusters. En: Astronomy and Astrophysics. 2015 ; Vol. 580.
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abstract = "Context. The inner disc, which links the thin disc with the bulge, has been somewhat neglected in the past because of the intrinsic difficulties in its study, among which crowding and high extinction. Open clusters located in the inner disc are among thebest tracers of its chemistry at different ages and distances. Aims. We analyse the chemical patterns of four open clusters located within 7 kpc of the Galactic centre and of field stars to infer the properties of the inner disc with the Gaia-ESO survey idr2/3 data release. Methods. We derive the parameters of the newly observed cluster, Berkeley 81, finding an age of about 1 Gyr and a Galactocentric distance of ∼5.4 kpc. We construct the chemical patterns of clusters and we compare them with those of field stars in the solar neighbourhood and in the inner-disc samples. Results. Comparing the three populations we observe that inner-disc clusters and field stars are both, on average, enhanced in [O/Fe], [Mg/Fe], and [Si/Fe]. Using the idr2/3 results of M67, we estimate the non-local thermodynamic equilibrium (NLTE) effect on the abundances of Mg and Si in giant stars. After empirically correcting for NLTE effects, we note that NGC 6705 and Be 81 still have a high [α/Fe]. Conclusions. The location of the four open clusters and of the field population reveals that the evolution of the metallicity [Fe/H] and of [α/Fe] can be explained within the framework of a simple chemical evolution model: both [Fe/H] and [α/Fe] of Trumpler 20 and of NGC 4815 are in agreement with expectations from a simple chemical evolution model. On the other hand, NGC 6705, and to a lesser degree Berkeley 81, have higher [α/Fe] than expected for their ages, location in the disc, and metallicity. These differences might originate from local enrichment processes as explained in the inhomogeneous evolution framework.",
keywords = "Galaxy: abundances, Galaxy: disk, Globular clusters: individual: NGC 4815, Open clusters and associations: general, Open clusters and associations: individual: NGC 6705, Open clusters and associations: individual: Trumpler 20",
author = "L. Magrini and S. Randich and P. Donati and A. Bragaglia and V. Adibekyan and D. Romano and R. Smiljanic and S. Blanco-Cuaresma and G. Tautvaišiene and E. Friel and J. Overbeek and H. Jacobson and T. Cantat-Gaudin and A. Vallenari and R. Sordo and E. Pancino and D. Geisler and {San Roman}, I. and S. Villanova and A. Casey and A. Hourihane and Worley, {C. C.} and P. Francois and G. Gilmore and T. Bensby and E. Flaccomio and Korn, {A. J.} and A. Recio-Blanco and G. Carraro and Costado, {M. T.} and E. Franciosini and U. Heiter and P. Jofr{\'e} and C. Lardo and {De Laverny}, P. and L. Monaco and L. Morbidelli and G. Sacco and Sousa, {S. G.} and S. Zaggia",
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Magrini, L, Randich, S, Donati, P, Bragaglia, A, Adibekyan, V, Romano, D, Smiljanic, R, Blanco-Cuaresma, S, Tautvaišiene, G, Friel, E, Overbeek, J, Jacobson, H, Cantat-Gaudin, T, Vallenari, A, Sordo, R, Pancino, E, Geisler, D, San Roman, I, Villanova, S, Casey, A, Hourihane, A, Worley, CC, Francois, P, Gilmore, G, Bensby, T, Flaccomio, E, Korn, AJ, Recio-Blanco, A, Carraro, G, Costado, MT, Franciosini, E, Heiter, U, Jofré, P, Lardo, C, De Laverny, P, Monaco, L, Morbidelli, L, Sacco, G, Sousa, SG & Zaggia, S 2015, 'The Gaia-ESO Survey: Insights into the inner-disc evolution from open clusters', Astronomy and Astrophysics, vol. 580, A85. https://doi.org/10.1051/0004-6361/201526305

The Gaia-ESO Survey : Insights into the inner-disc evolution from open clusters. / Magrini, L.; Randich, S.; Donati, P.; Bragaglia, A.; Adibekyan, V.; Romano, D.; Smiljanic, R.; Blanco-Cuaresma, S.; Tautvaišiene, G.; Friel, E.; Overbeek, J.; Jacobson, H.; Cantat-Gaudin, T.; Vallenari, A.; Sordo, R.; Pancino, E.; Geisler, D.; San Roman, I.; Villanova, S.; Casey, A.; Hourihane, A.; Worley, C. C.; Francois, P.; Gilmore, G.; Bensby, T.; Flaccomio, E.; Korn, A. J.; Recio-Blanco, A.; Carraro, G.; Costado, M. T.; Franciosini, E.; Heiter, U.; Jofré, P.; Lardo, C.; De Laverny, P.; Monaco, L.; Morbidelli, L.; Sacco, G.; Sousa, S. G.; Zaggia, S.

En: Astronomy and Astrophysics, Vol. 580, A85, 01.08.2015.

Resultado de la investigación: Review article

TY - JOUR

T1 - The Gaia-ESO Survey

T2 - Insights into the inner-disc evolution from open clusters

AU - Magrini, L.

AU - Randich, S.

AU - Donati, P.

AU - Bragaglia, A.

AU - Adibekyan, V.

AU - Romano, D.

AU - Smiljanic, R.

AU - Blanco-Cuaresma, S.

AU - Tautvaišiene, G.

AU - Friel, E.

AU - Overbeek, J.

AU - Jacobson, H.

AU - Cantat-Gaudin, T.

AU - Vallenari, A.

AU - Sordo, R.

AU - Pancino, E.

AU - Geisler, D.

AU - San Roman, I.

AU - Villanova, S.

AU - Casey, A.

AU - Hourihane, A.

AU - Worley, C. C.

AU - Francois, P.

AU - Gilmore, G.

AU - Bensby, T.

AU - Flaccomio, E.

AU - Korn, A. J.

AU - Recio-Blanco, A.

AU - Carraro, G.

AU - Costado, M. T.

AU - Franciosini, E.

AU - Heiter, U.

AU - Jofré, P.

AU - Lardo, C.

AU - De Laverny, P.

AU - Monaco, L.

AU - Morbidelli, L.

AU - Sacco, G.

AU - Sousa, S. G.

AU - Zaggia, S.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - Context. The inner disc, which links the thin disc with the bulge, has been somewhat neglected in the past because of the intrinsic difficulties in its study, among which crowding and high extinction. Open clusters located in the inner disc are among thebest tracers of its chemistry at different ages and distances. Aims. We analyse the chemical patterns of four open clusters located within 7 kpc of the Galactic centre and of field stars to infer the properties of the inner disc with the Gaia-ESO survey idr2/3 data release. Methods. We derive the parameters of the newly observed cluster, Berkeley 81, finding an age of about 1 Gyr and a Galactocentric distance of ∼5.4 kpc. We construct the chemical patterns of clusters and we compare them with those of field stars in the solar neighbourhood and in the inner-disc samples. Results. Comparing the three populations we observe that inner-disc clusters and field stars are both, on average, enhanced in [O/Fe], [Mg/Fe], and [Si/Fe]. Using the idr2/3 results of M67, we estimate the non-local thermodynamic equilibrium (NLTE) effect on the abundances of Mg and Si in giant stars. After empirically correcting for NLTE effects, we note that NGC 6705 and Be 81 still have a high [α/Fe]. Conclusions. The location of the four open clusters and of the field population reveals that the evolution of the metallicity [Fe/H] and of [α/Fe] can be explained within the framework of a simple chemical evolution model: both [Fe/H] and [α/Fe] of Trumpler 20 and of NGC 4815 are in agreement with expectations from a simple chemical evolution model. On the other hand, NGC 6705, and to a lesser degree Berkeley 81, have higher [α/Fe] than expected for their ages, location in the disc, and metallicity. These differences might originate from local enrichment processes as explained in the inhomogeneous evolution framework.

AB - Context. The inner disc, which links the thin disc with the bulge, has been somewhat neglected in the past because of the intrinsic difficulties in its study, among which crowding and high extinction. Open clusters located in the inner disc are among thebest tracers of its chemistry at different ages and distances. Aims. We analyse the chemical patterns of four open clusters located within 7 kpc of the Galactic centre and of field stars to infer the properties of the inner disc with the Gaia-ESO survey idr2/3 data release. Methods. We derive the parameters of the newly observed cluster, Berkeley 81, finding an age of about 1 Gyr and a Galactocentric distance of ∼5.4 kpc. We construct the chemical patterns of clusters and we compare them with those of field stars in the solar neighbourhood and in the inner-disc samples. Results. Comparing the three populations we observe that inner-disc clusters and field stars are both, on average, enhanced in [O/Fe], [Mg/Fe], and [Si/Fe]. Using the idr2/3 results of M67, we estimate the non-local thermodynamic equilibrium (NLTE) effect on the abundances of Mg and Si in giant stars. After empirically correcting for NLTE effects, we note that NGC 6705 and Be 81 still have a high [α/Fe]. Conclusions. The location of the four open clusters and of the field population reveals that the evolution of the metallicity [Fe/H] and of [α/Fe] can be explained within the framework of a simple chemical evolution model: both [Fe/H] and [α/Fe] of Trumpler 20 and of NGC 4815 are in agreement with expectations from a simple chemical evolution model. On the other hand, NGC 6705, and to a lesser degree Berkeley 81, have higher [α/Fe] than expected for their ages, location in the disc, and metallicity. These differences might originate from local enrichment processes as explained in the inhomogeneous evolution framework.

KW - Galaxy: abundances

KW - Galaxy: disk

KW - Globular clusters: individual: NGC 4815

KW - Open clusters and associations: general

KW - Open clusters and associations: individual: NGC 6705

KW - Open clusters and associations: individual: Trumpler 20

UR - http://www.scopus.com/inward/record.url?scp=84938783215&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201526305

DO - 10.1051/0004-6361/201526305

M3 - Review article

AN - SCOPUS:84938783215

VL - 580

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A85

ER -

Magrini L, Randich S, Donati P, Bragaglia A, Adibekyan V, Romano D y otros. The Gaia-ESO Survey: Insights into the inner-disc evolution from open clusters. Astronomy and Astrophysics. 2015 ago 1;580. A85. https://doi.org/10.1051/0004-6361/201526305