Photometric membership and metallicities of red giant candidates in selected open clusters

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 supplemen...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2008
Materias:
Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807)
Stars: abundances
Techniques: photometry
Techniques: radial velocities
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046337_v329_n6_p609_Claria
http://hdl.handle.net/20.500.12110/paper_00046337_v329_n6_p609_Claria
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00046337_v329_n6_p609_Claria
record_format dspace
spelling paper:paper_00046337_v329_n6_p609_Claria2023-06-08T14:27:18Z Photometric membership and metallicities of red giant candidates in selected open clusters Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807) Stars: abundances Techniques: photometry Techniques: radial velocities 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. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046337_v329_n6_p609_Claria http://hdl.handle.net/20.500.12110/paper_00046337_v329_n6_p609_Claria
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807)
Stars: abundances
Techniques: photometry
Techniques: radial velocities
spellingShingle Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807)
Stars: abundances
Techniques: photometry
Techniques: radial velocities
Photometric membership and metallicities of red giant candidates in selected open clusters
topic_facet Open clusters and associations: individual (NGC2360, NGC2423, NGC2437, NGC2482, NGC6425, Lodén 807)
Stars: abundances
Techniques: photometry
Techniques: radial velocities
description 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.
title Photometric membership and metallicities of red giant candidates in selected open clusters
title_short Photometric membership and metallicities of red giant candidates in selected open clusters
title_full Photometric membership and metallicities of red giant candidates in selected open clusters
title_fullStr Photometric membership and metallicities of red giant candidates in selected open clusters
title_full_unstemmed Photometric membership and metallicities of red giant candidates in selected open clusters
title_sort photometric membership and metallicities of red giant candidates in selected open clusters
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046337_v329_n6_p609_Claria
http://hdl.handle.net/20.500.12110/paper_00046337_v329_n6_p609_Claria
_version_ 1768543160501272576

Ejemplares similares