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28 March 2024
 
  » arxiv » astro-ph/0503550

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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
AffiliationUChile/Yale), Doug Geisler (Concepcion), Gustavo Baume (LaPlata), Ruben Vazquez (LaPlata), Andre Moitinho (Lisboa
AbstractWe 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
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