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The intermediate-age open clusters Ruprecht 4, Ruprecht 7 and Pismis 15 | Giovanni Carraro
; Doug Geisler
; Gustavo Baume
; Ruben Vazquez
; Andre Moitinho
; | Date: |
24 Mar 2005 | Journal: | Mon.Not.Roy.Astron.Soc. 360 (2005) 655-661 | Subject: | astro-ph | Affiliation: | UChile/Yale), Doug Geisler (Concepcion), Gustavo Baume (LaPlata), Ruben Vazquez (LaPlata), Andre Moitinho (Lisboa | Abstract: | We report on $BVI$ CCD photometry to $V=22.0$ for 3 fields centered on the region of the Galactic star clusters Ruprecht~4, Ruprecht~7 and Pismis~15 and on 3 displaced control fields. Ruprecht~4 and Pismis~15 have never been studied before, and we provide for the first time estimates of their fundamental parameters, namely, radial extent, age, distance and reddening. Ruprecht~7 (Berkeley~33) however was studied by Mazur et al. (1993). We find that the three clusters are all of intermediate age (0.8-1.3 Gyr), and with a metallicity close to or lower than solar. | Source: | arXiv, astro-ph/0503550 | Services: | Forum | Review | PDF | Favorites |
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