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Abstract:

As part of a long-term project to determine abundances and astrophysical properties of evolved red stars in open clusters, we present high-precision DDO photoelectric observations for a sample of 33 red giant candidates projected in the fields of nine Galactic open clusters. These data are supplemented with UBV photoelectric photometry of 24 of these stars as well as with CORAVEL radial-velocity observations for 13 red giant candidates in four of the clusters. We also present Washington photoelectric photometry of a small sample of red giant candidates of the open cluster Ruprecht 97. The likelihood of cluster membership for each star photometrically observed and for 23 additional red giant candidates with UBV and DDO data available in the literature, is evaluated by using two independent photometric criteria. Nearly 82% of the analysed stars are found to have a high probability of being cluster giants. Photometric membership probabilities show very good agreement with those obtained from CORAVEL radial velocities. While E(B - V) colour excesses were determined from combined B - V and DDO colours, calibrations of the DDO system were used to derive MK spectral types, effective temperatures and metallicities. The derived DDO metallicities range between values typical of moderately metal-poor clusters ([Fe/H] = -0.19) to moderately metal-rich ([Fe/H] = 0.25) ones. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

Registro:

Documento: Artículo
Título:Photometric membership and metallicities of red giant candidates in selected open clusters
Autor:Claría, J.J.; Piatti, A.E.; Mermilliod, J.-C.; Palma, T.
Filiación:Observatorio Astronómico, Laprida 854, 5000 Córdoba, Argentina
Instituto de Astronomía Y Física del Espacio, CC 67, Suc. 28, 1428 Buenos Aires, Argentina
Laboratoire d'Astrophysique, l'École Polytechnique Fédérale de Lausanne, Observatoire, 1290 Sauverny, Switzerland
Palabras clave:Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807); Stars: abundances; Techniques: photometry; Techniques: radial velocities
Año:2008
Volumen:329
Número:6
Página de inicio:609
Página de fin:618
DOI: http://dx.doi.org/10.1002/asna.200710970
Título revista:Astronomische Nachrichten
Título revista abreviado:Astron. Nachr.
ISSN:00046337
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046337_v329_n6_p609_Claria

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Citas:

---------- APA ----------
Claría, J.J., Piatti, A.E., Mermilliod, J.-C. & Palma, T. (2008) . Photometric membership and metallicities of red giant candidates in selected open clusters. Astronomische Nachrichten, 329(6), 609-618.
http://dx.doi.org/10.1002/asna.200710970
---------- CHICAGO ----------
Claría, J.J., Piatti, A.E., Mermilliod, J.-C., Palma, T. "Photometric membership and metallicities of red giant candidates in selected open clusters" . Astronomische Nachrichten 329, no. 6 (2008) : 609-618.
http://dx.doi.org/10.1002/asna.200710970
---------- MLA ----------
Claría, J.J., Piatti, A.E., Mermilliod, J.-C., Palma, T. "Photometric membership and metallicities of red giant candidates in selected open clusters" . Astronomische Nachrichten, vol. 329, no. 6, 2008, pp. 609-618.
http://dx.doi.org/10.1002/asna.200710970
---------- VANCOUVER ----------
Claría, J.J., Piatti, A.E., Mermilliod, J.-C., Palma, T. Photometric membership and metallicities of red giant candidates in selected open clusters. Astron. Nachr. 2008;329(6):609-618.
http://dx.doi.org/10.1002/asna.200710970