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2017-10-01

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/123177

OCCASO - II. Physical parameters and Fe abundances of red clump stars in 18 open clusters

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https://doi.org/10.1093/mnras/stx1481

Resum

Open clusters have long been used to study the chemodynamical evolution of the Galactic disc. This requires a homogeneously analysed sample covering a wide range of ages and distances. In this paper, we present the Open Clusters Chemical Abundances from Spanish Observatories (OCCASO) second data release. This comprises a sample of high-resolution (R > 65 000) and high signal-to-noise spectra of 115 red clump stars in 18 open clusters. We derive atmospheric parameters (Teff, log g, ξ), and [Fe/H] abundances using two analysis techniques: equivalent widths and spectral synthesis. A detailed comparison and a critical review of the results of the two methods are made. Both methods are carefully tested between them, with the Gaia FGK benchmark stars, and with an extensive sample of literature values. We perform a membership study using radial velocities and the resulting abundances. Finally, we compare our results with a chemodynamical model of the Milky Way thin disc concluding that the oldest open clusters are consistent with the models only when dynamical effects are taken into account.

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Espectroscòpia, Cúmuls de galàxies

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Spectrum analysis, Clusters of galaxies

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citació

CASAMIQUELA, Laia, CARRERA JIMÉNEZ, Ricardo, BLANCO CUARESMA, S., JORDI I NEBOT, Carme, BALAGUER NÚÑEZ, María de los dolores, PANCINO, E., ANDERS, Friedrich, CHIAPPINI, C., DÍAZ PÉREZ, L., AGUADO, D. s., APARICIO, A., GARCÍA DIAS, R., HEITER, U., MARTÍNEZ VÁZQUEZ, C. e., MURABITO, S., DEL PINO GUTIÉRREZ, Amparo. OCCASO - II. Physical parameters and Fe abundances of red clump stars in 18 open clusters. _Monthly Notices of the Royal Astronomical Society_. 2017. Vol. 470, núm. 4, pàgs. 4363-4381. [consulta: 10 de gener de 2026]. ISSN: 0035-8711. [Disponible a: https://hdl.handle.net/2445/123177]

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