Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity

Aims. We present new CORAVEL radial-velocity observations and photoelectric photometry in the UBV and DDO systems for a sample of potential members of the red-giant branches of NGC 6192, NGC 6208 and NGC 6268, three open clusters projected close to the Galactic center direction. We also examine the...

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Detalles Bibliográficos
Publicado: 2006
Materias:
Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Information theory
Kinematics
Metal analysis
Photoelectricity
Photometry
Spectroscopic analysis
Sun
Astrophysics
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v453_n1_p91_Claria
http://hdl.handle.net/20.500.12110/paper_00046361_v453_n1_p91_Claria
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00046361_v453_n1_p91_Claria
record_format dspace
spelling paper:paper_00046361_v453_n1_p91_Claria2023-06-08T14:27:41Z Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity Galaxy: Open clusters and associations: General Stars: Abundances Stars: Binaries: Spectroscopic Techniques: Photometric Techniques: Radial velocities Information theory Kinematics Metal analysis Photoelectricity Photometry Spectroscopic analysis Sun Galaxy: Open clusters and associations: General Stars: Abundances Stars: Binaries: Spectroscopic Techniques: Photometric Techniques: Radial velocities Astrophysics Aims. We present new CORAVEL radial-velocity observations and photoelectric photometry in the UBV and DDO systems for a sample of potential members of the red-giant branches of NGC 6192, NGC 6208 and NGC 6268, three open clusters projected close to the Galactic center direction. We also examine the properties of a sample of 42 inner disk open clusters projected towards almost the same direction as the three clusters. Methods. Cluster members and red field giants were discriminated by using the CORAVEL radial-velocity data and by applying two photometric criteria. Interstellar reddening and metal content of the clusters were derived from combined BV and DDO data. Results. Cluster membership for five red giants in NGC 6192, three in NGC 6208 and three in NGC 6268 has been confirmed by the analysis of the photometric and kinematic data. Photometric membership probabilities show very good agreement with those obtained from CORAVEL radial velocities. Three new spectroscopic binaries were discovered among the red giants of NGC 6192 and NGC 6208. Mean radial velocities and E(B - V) colour excesses were derived. Conclusions. The overall metallicities were found to be nearly solar for NGC 6208 and above solar for NGC 6192 and NGC 6268. Most of the clusters located closer than 2 kpc from the Sun in the considered direction are slightly more reddened than the absorption resulting from the Baade's window absorption law. © ESO 2006. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v453_n1_p91_Claria http://hdl.handle.net/20.500.12110/paper_00046361_v453_n1_p91_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 Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Information theory
Kinematics
Metal analysis
Photoelectricity
Photometry
Spectroscopic analysis
Sun
Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Astrophysics
spellingShingle Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Information theory
Kinematics
Metal analysis
Photoelectricity
Photometry
Spectroscopic analysis
Sun
Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Astrophysics
Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
topic_facet Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Information theory
Kinematics
Metal analysis
Photoelectricity
Photometry
Spectroscopic analysis
Sun
Galaxy: Open clusters and associations: General
Stars: Abundances
Stars: Binaries: Spectroscopic
Techniques: Photometric
Techniques: Radial velocities
Astrophysics
description Aims. We present new CORAVEL radial-velocity observations and photoelectric photometry in the UBV and DDO systems for a sample of potential members of the red-giant branches of NGC 6192, NGC 6208 and NGC 6268, three open clusters projected close to the Galactic center direction. We also examine the properties of a sample of 42 inner disk open clusters projected towards almost the same direction as the three clusters. Methods. Cluster members and red field giants were discriminated by using the CORAVEL radial-velocity data and by applying two photometric criteria. Interstellar reddening and metal content of the clusters were derived from combined BV and DDO data. Results. Cluster membership for five red giants in NGC 6192, three in NGC 6208 and three in NGC 6268 has been confirmed by the analysis of the photometric and kinematic data. Photometric membership probabilities show very good agreement with those obtained from CORAVEL radial velocities. Three new spectroscopic binaries were discovered among the red giants of NGC 6192 and NGC 6208. Mean radial velocities and E(B - V) colour excesses were derived. Conclusions. The overall metallicities were found to be nearly solar for NGC 6208 and above solar for NGC 6192 and NGC 6268. Most of the clusters located closer than 2 kpc from the Sun in the considered direction are slightly more reddened than the absorption resulting from the Baade's window absorption law. © ESO 2006.
title Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
title_short Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
title_full Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
title_fullStr Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
title_full_unstemmed Photometric and Coravel observations of red giant candidates in three open clusters: Membership, binarity, reddening and metallicity
title_sort photometric and coravel observations of red giant candidates in three open clusters: membership, binarity, reddening and metallicity
publishDate 2006
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v453_n1_p91_Claria
http://hdl.handle.net/20.500.12110/paper_00046361_v453_n1_p91_Claria
_version_ 1768546518127607808

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