Resumen
Context. The nature of the metallicity gradient inside the solar circle (RGC < 8 kpc) is poorly understood, but studies of Cepheids and a small sample of open clusters suggest that it steepens in the inner disk. Aims. We investigate the metallicity gradient of the inner disk using a sample of inner disk open clusters that is three times larger than has previously been studied in the literature to better characterize the gradient in this part of the disk. Methods. We used the Gaia-ESO Survey (GES) [Fe/H] values and stellar parameters for stars in 12 open clusters in the inner disk from GES-UVES data. Cluster mean [Fe/H] values were determined based on a membership analysis for each cluster. Where necessary, distances and ages to clusters were determined via comparison to theoretical isochrones. Results. The GES open clusters exhibit a radial metallicity gradient of -0.10 ± 0.02 dex kpc-1, consistent with the gradient measured by other literature studies of field red giant stars and open clusters in the range RGC ~ 6-12 kpc. We also measure a trend of increasing [Fe/H] with increasing cluster age, as has also been found in the literature. Conclusions. We find no evidence for a steepening of the inner disk metallicity gradient inside the solar circle as earlier studies indicated. The age-metallicity relation shown by the clusters is consistent with that predicted by chemical evolution models that include the effects of radial migration, but a more detailed comparison between cluster observations and models would be premature.
| Idioma original | English |
|---|---|
| Número de artículo | A37 |
| Publicación | Astronomy and Astrophysics |
| Volumen | 591 |
| DOI | |
| Estado | Published - 1 ene 2016 |
Huella dactilar
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Citar esto
}
The Gaia -ESO Survey : Probes of the inner disk abundance gradient. / Jacobson, H. R.; Friel, E. D.; Jílková, L.; Magrini, L.; Bragaglia, A.; Vallenari, A.; Tosi, M.; Randich, S.; Donati, P.; Cantat-Gaudin, T.; Sordo, R.; Smiljanic, R.; Overbeek, J. C.; Carraro, G.; Tautvaišiene, G.; San Roman, I.; Villanova, S.; Geisler, D.; Muñoz, C.; Jiménez-Esteban, F.; Tang, B.; Gilmore, G.; Alfaro, E. J.; Bensby, T.; Flaccomio, E.; Koposov, S. E.; Korn, A. J.; Pancino, E.; Recio-Blanco, A.; Casey, A. R.; Costado, M. T.; Franciosini, E.; Heiter, U.; Hill, V.; Hourihane, A.; Lardo, C.; De Laverny, P.; Lewis, J.; Monaco, L.; Morbidelli, L.; Sacco, G. G.; Sousa, S. G.; Worley, C. C.; Zaggia, S.
En: Astronomy and Astrophysics, Vol. 591, A37, 01.01.2016.Resultado de la investigación: Article
TY - JOUR
T1 - The Gaia -ESO Survey
T2 - Probes of the inner disk abundance gradient
AU - Jacobson, H. R.
AU - Friel, E. D.
AU - Jílková, L.
AU - Magrini, L.
AU - Bragaglia, A.
AU - Vallenari, A.
AU - Tosi, M.
AU - Randich, S.
AU - Donati, P.
AU - Cantat-Gaudin, T.
AU - Sordo, R.
AU - Smiljanic, R.
AU - Overbeek, J. C.
AU - Carraro, G.
AU - Tautvaišiene, G.
AU - San Roman, I.
AU - Villanova, S.
AU - Geisler, D.
AU - Muñoz, C.
AU - Jiménez-Esteban, F.
AU - Tang, B.
AU - Gilmore, G.
AU - Alfaro, E. J.
AU - Bensby, T.
AU - Flaccomio, E.
AU - Koposov, S. E.
AU - Korn, A. J.
AU - Pancino, E.
AU - Recio-Blanco, A.
AU - Casey, A. R.
AU - Costado, M. T.
AU - Franciosini, E.
AU - Heiter, U.
AU - Hill, V.
AU - Hourihane, A.
AU - Lardo, C.
AU - De Laverny, P.
AU - Lewis, J.
AU - Monaco, L.
AU - Morbidelli, L.
AU - Sacco, G. G.
AU - Sousa, S. G.
AU - Worley, C. C.
AU - Zaggia, S.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Context. The nature of the metallicity gradient inside the solar circle (RGC < 8 kpc) is poorly understood, but studies of Cepheids and a small sample of open clusters suggest that it steepens in the inner disk. Aims. We investigate the metallicity gradient of the inner disk using a sample of inner disk open clusters that is three times larger than has previously been studied in the literature to better characterize the gradient in this part of the disk. Methods. We used the Gaia-ESO Survey (GES) [Fe/H] values and stellar parameters for stars in 12 open clusters in the inner disk from GES-UVES data. Cluster mean [Fe/H] values were determined based on a membership analysis for each cluster. Where necessary, distances and ages to clusters were determined via comparison to theoretical isochrones. Results. The GES open clusters exhibit a radial metallicity gradient of -0.10 ± 0.02 dex kpc-1, consistent with the gradient measured by other literature studies of field red giant stars and open clusters in the range RGC ~ 6-12 kpc. We also measure a trend of increasing [Fe/H] with increasing cluster age, as has also been found in the literature. Conclusions. We find no evidence for a steepening of the inner disk metallicity gradient inside the solar circle as earlier studies indicated. The age-metallicity relation shown by the clusters is consistent with that predicted by chemical evolution models that include the effects of radial migration, but a more detailed comparison between cluster observations and models would be premature.
AB - Context. The nature of the metallicity gradient inside the solar circle (RGC < 8 kpc) is poorly understood, but studies of Cepheids and a small sample of open clusters suggest that it steepens in the inner disk. Aims. We investigate the metallicity gradient of the inner disk using a sample of inner disk open clusters that is three times larger than has previously been studied in the literature to better characterize the gradient in this part of the disk. Methods. We used the Gaia-ESO Survey (GES) [Fe/H] values and stellar parameters for stars in 12 open clusters in the inner disk from GES-UVES data. Cluster mean [Fe/H] values were determined based on a membership analysis for each cluster. Where necessary, distances and ages to clusters were determined via comparison to theoretical isochrones. Results. The GES open clusters exhibit a radial metallicity gradient of -0.10 ± 0.02 dex kpc-1, consistent with the gradient measured by other literature studies of field red giant stars and open clusters in the range RGC ~ 6-12 kpc. We also measure a trend of increasing [Fe/H] with increasing cluster age, as has also been found in the literature. Conclusions. We find no evidence for a steepening of the inner disk metallicity gradient inside the solar circle as earlier studies indicated. The age-metallicity relation shown by the clusters is consistent with that predicted by chemical evolution models that include the effects of radial migration, but a more detailed comparison between cluster observations and models would be premature.
KW - Galaxy: abundances
KW - Galaxy: disk
KW - Galaxy: formation
KW - Stars: abundances
UR - http://www.scopus.com/inward/record.url?scp=84974534206&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/201527654
DO - 10.1051/0004-6361/201527654
M3 - Article
AN - SCOPUS:84974534206
VL - 591
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
M1 - A37
ER -