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http://hdl.handle.net/2445/123120
Title: | The open cluster King 1 in the second quadrant |
Author: | Carrera, Ricardo Rodríguez Espinosa, Loreto Casamiquela Floriach, Laia Balaguer Núñez, María de los Dolores Jordi i Nebot, Carme Allende Prieto, Carlos Stetson, Peter B. |
Keywords: | Cúmuls d'estels Galàxies Clusters of stars Galaxies |
Issue Date: | 1-Oct-2017 |
Publisher: | Royal Astronomical Society |
Abstract: | We analyse the poorly studied open cluster King 1 in the second Galactic quadrant. From wide-field photometry, we have studied the spatial distribution of this cluster. We determined that the centre of King 1 is located at α2000 = 00h22m and δ2000 = +64°23΄. By parameterizing the stellar density with a King profile, we have obtained a central density of ρ0 = 6.5 ± 0.2 star arcmin-2 and a core radius of rcore = 1.9 ± 0.2 arcmin. By comparing the observed colour-magnitude diagram of King 1 with those of similar open clusters and with different sets of isochrones, we have estimated an age of 2.8 ± 0.3 Gyr, a distance modulus of (m - M)o = 10.6 ± 0.1 mag and a reddening of E(B - V) = 0.80 ± 0.05 mag. To complete our analysis, we acquired medium resolution spectra for 189 stars in the area of King 1. From their derived radial velocities, we determined an average velocity = -53.1 ± 3.1 km s-1. From the strength of the infrared Ca II lines in red giants we have determined an average metallicity of <[M/H]> = +0.07 ± 0.08 dex. From spectral synthesis, we have also estimated an α-elements abundance of <[α/M]> = -0.10 ± 0.08 dex. |
Note: | Reproducció del document publicat a: https://doi.org/10.1093/mnras/stx1526 |
It is part of: | Monthly Notices of the Royal Astronomical Society, 2017, vol. 470, num. 4, p. 4285-4297 |
URI: | http://hdl.handle.net/2445/123120 |
Related resource: | https://doi.org/10.1093/mnras/stx1526 |
ISSN: | 0035-8711 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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675361.pdf | 4.25 MB | Adobe PDF | View/Open |
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