First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant

We present CCD photometry in the Johnson UBV and Kron-Cousins I systems down to V~ 22.0 for the open clusters NGC 2311, Trumpler 6, NGC 2432 and BH 54 and their surrounding fields. Trumpler 6 and BH 54 have never been studied before and so we provide, for the first time, estimates of their fundament...

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Autores principales:	Piatti, A.E., Clariá, J.J., Ahumada, A.V.
Formato:	JOUR
Materias:	Open clusters and associations: general Open clusters and associations: individual: BH 54 Open clusters and associations: individual: NGC 2311 Open clusters and associations: individual: NGC 2432 Open clusters and associations: individual: Trumpler 6 Techniques: photometric
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00358711_v408_n2_p1147_Piatti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00358711_v408_n2_p1147_Piatti
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spelling	todo:paper_00358711_v408_n2_p1147_Piatti2023-10-03T14:46:59Z First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant Piatti, A.E. Clariá, J.J. Ahumada, A.V. Open clusters and associations: general Open clusters and associations: individual: BH 54 Open clusters and associations: individual: NGC 2311 Open clusters and associations: individual: NGC 2432 Open clusters and associations: individual: Trumpler 6 Techniques: photometric We present CCD photometry in the Johnson UBV and Kron-Cousins I systems down to V~ 22.0 for the open clusters NGC 2311, Trumpler 6, NGC 2432 and BH 54 and their surrounding fields. Trumpler 6 and BH 54 have never been studied before and so we provide, for the first time, estimates of their fundamental parameters. We obtained colour-magnitude diagrams (CMDs) and colour-colour diagrams cleaned from field star contamination by statistically subtracting stars in terms of spatial density, magnitude and colour distributions. Cluster angular radii were estimated from star counts in appropriate-sized boxes distributed throughout the entire observed fields. Using the cleaned CMDs and colour-colour diagrams, we applied sound photometric membership criteria to discriminate cluster members from interloper field stars. The interstellar extinction across the cluster fields derived from the 100-μm dust emission full-sky maps can be considered uniform within the quoted uncertainties. The E(B-V) and E(V-I) colour excesses and the apparent distance moduli of the clusters were estimated from the fit of the zero-age main-sequence to the colour-colour diagrams and CMDs, respectively. Cluster ages were determined from the comparison of the four clusters' CMDs with solar metallicity theoretical isochrones of the Geneva group. All the clusters were found to be moderately young objects, their ages ranging between 60 and 250 Myr. © 2010 The Authors. Journal compilation © 2010 RAS. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v408_n2_p1147_Piatti
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: general Open clusters and associations: individual: BH 54 Open clusters and associations: individual: NGC 2311 Open clusters and associations: individual: NGC 2432 Open clusters and associations: individual: Trumpler 6 Techniques: photometric
spellingShingle	Open clusters and associations: general Open clusters and associations: individual: BH 54 Open clusters and associations: individual: NGC 2311 Open clusters and associations: individual: NGC 2432 Open clusters and associations: individual: Trumpler 6 Techniques: photometric Piatti, A.E. Clariá, J.J. Ahumada, A.V. First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
topic_facet	Open clusters and associations: general Open clusters and associations: individual: BH 54 Open clusters and associations: individual: NGC 2311 Open clusters and associations: individual: NGC 2432 Open clusters and associations: individual: Trumpler 6 Techniques: photometric
description	We present CCD photometry in the Johnson UBV and Kron-Cousins I systems down to V~ 22.0 for the open clusters NGC 2311, Trumpler 6, NGC 2432 and BH 54 and their surrounding fields. Trumpler 6 and BH 54 have never been studied before and so we provide, for the first time, estimates of their fundamental parameters. We obtained colour-magnitude diagrams (CMDs) and colour-colour diagrams cleaned from field star contamination by statistically subtracting stars in terms of spatial density, magnitude and colour distributions. Cluster angular radii were estimated from star counts in appropriate-sized boxes distributed throughout the entire observed fields. Using the cleaned CMDs and colour-colour diagrams, we applied sound photometric membership criteria to discriminate cluster members from interloper field stars. The interstellar extinction across the cluster fields derived from the 100-μm dust emission full-sky maps can be considered uniform within the quoted uncertainties. The E(B-V) and E(V-I) colour excesses and the apparent distance moduli of the clusters were estimated from the fit of the zero-age main-sequence to the colour-colour diagrams and CMDs, respectively. Cluster ages were determined from the comparison of the four clusters' CMDs with solar metallicity theoretical isochrones of the Geneva group. All the clusters were found to be moderately young objects, their ages ranging between 60 and 250 Myr. © 2010 The Authors. Journal compilation © 2010 RAS.
format	JOUR
author	Piatti, A.E. Clariá, J.J. Ahumada, A.V.
author_facet	Piatti, A.E. Clariá, J.J. Ahumada, A.V.
author_sort	Piatti, A.E.
title	First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
title_short	First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
title_full	First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
title_fullStr	First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
title_full_unstemmed	First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant
title_sort	first ccd ubvi photometric analysis of four moderately young open clusters in the third galactic quadrant
url	http://hdl.handle.net/20.500.12110/paper_00358711_v408_n2_p1147_Piatti
work_keys_str_mv	AT piattiae firstccdubviphotometricanalysisoffourmoderatelyyoungopenclustersinthethirdgalacticquadrant AT clariajj firstccdubviphotometricanalysisoffourmoderatelyyoungopenclustersinthethirdgalacticquadrant AT ahumadaav firstccdubviphotometricanalysisoffourmoderatelyyoungopenclustersinthethirdgalacticquadrant
_version_	1807315007524831232

First CCD UBVI photometric analysis of four moderately young open clusters in the third galactic quadrant

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