NGC 2587: A sparse open cluster projected onto a populous star field

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We present CCD BVIKC photometry in the field of the open cluster NGC 2587. We developed a new method to clean statistically the colour-magnitude diagrams. NGC 2587 is found to be slightly younger than the Hyades and probably of solar metallicity. From 18 probable members with measured proper motions...

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Detalles Bibliográficos
Autores principales: Piatti, A.E., Clariá, J.J., Ahumada, A.V., de Grijs R., Lepine J.R.D.
Formato: SER
Materias:
Open clusters and associations: individual (NGC 2587)
Techniques: photometric
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17439213_v5_nS266_p504_Piatti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We present CCD BVIKC photometry in the field of the open cluster NGC 2587. We developed a new method to clean statistically the colour-magnitude diagrams. NGC 2587 is found to be slightly younger than the Hyades and probably of solar metallicity. From 18 probable members with measured proper motions, we derived the following mean cluster values: μα = -4.3 ± 3.6 mas yr-1 and μδ = -2.5 ± 3.4 mas yr -1. Colour excesses, E(B - V) = 0.10 and E(V - I) = 0.15 mag, and a heliocentric distance of 3.7 ± 0.7 kpc are obtained. The interstellar extinction in the cluster direction is found to follow the normal reddening law. © International Astronomical Union 2010.

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