The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster

CCD observations in the Johnson V, Kron-Cousins I and the Washington system C and T1 passbands have been used to generate colour-magnitude diagrams (CMDs) reaching down to V ∼ 21.0 mag and T1 ∼ 19.0 for Trumpler 5, an old open cluster located towards the Galactic anticentre. Our data analysis confir...

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Detalles Bibliográficos
Autores principales:	Piatti, A.E., Clariá, J.J., Ahumada, A.V.
Formato:	JOUR
Materias:	Open clusters and associations: general Open clusters and associations: individual: Trumpler 5 Techniques: photometric
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00358711_v349_n2_p641_Piatti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00358711_v349_n2_p641_Piatti
record_format	dspace
spelling	todo:paper_00358711_v349_n2_p641_Piatti2023-10-03T14:46:43Z The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster Piatti, A.E. Clariá, J.J. Ahumada, A.V. Open clusters and associations: general Open clusters and associations: individual: Trumpler 5 Techniques: photometric CCD observations in the Johnson V, Kron-Cousins I and the Washington system C and T1 passbands have been used to generate colour-magnitude diagrams (CMDs) reaching down to V ∼ 21.0 mag and T1 ∼ 19.0 for Trumpler 5, an old open cluster located towards the Galactic anticentre. Our data analysis confirms the existence of non-uniform extinction over the face of the cluster, the mean E(V - I) and E(C - T1) values being 0.80 ± 0.05 and 1.17 ± 0.15, respectively. Through comparison of the cluster CMDs with theoretical isochrones of the Geneva group, Washington Standard Giant Branches and measures of δV and δT1 indices, we derive the following values for the cluster apparent distance modulus, age, and metallicity: V - Mv = 13.80 ± 0.30 (corresponding to a distance from the Sun of 2.4 ± 0.5 kpc and 0.04 kpc above the Galactic plane), t = 5.0 ± 0.5 Gyr and [Fe/H] = -0.30 ± 0.15. We estimate the cluster angular radius to be about 7.7 arcmin (= 5.4 pc) from star counts carried out within and outside the cluster field. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v349_n2_p641_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: Trumpler 5 Techniques: photometric
spellingShingle	Open clusters and associations: general Open clusters and associations: individual: Trumpler 5 Techniques: photometric Piatti, A.E. Clariá, J.J. Ahumada, A.V. The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
topic_facet	Open clusters and associations: general Open clusters and associations: individual: Trumpler 5 Techniques: photometric
description	CCD observations in the Johnson V, Kron-Cousins I and the Washington system C and T1 passbands have been used to generate colour-magnitude diagrams (CMDs) reaching down to V ∼ 21.0 mag and T1 ∼ 19.0 for Trumpler 5, an old open cluster located towards the Galactic anticentre. Our data analysis confirms the existence of non-uniform extinction over the face of the cluster, the mean E(V - I) and E(C - T1) values being 0.80 ± 0.05 and 1.17 ± 0.15, respectively. Through comparison of the cluster CMDs with theoretical isochrones of the Geneva group, Washington Standard Giant Branches and measures of δV and δT1 indices, we derive the following values for the cluster apparent distance modulus, age, and metallicity: V - Mv = 13.80 ± 0.30 (corresponding to a distance from the Sun of 2.4 ± 0.5 kpc and 0.04 kpc above the Galactic plane), t = 5.0 ± 0.5 Gyr and [Fe/H] = -0.30 ± 0.15. We estimate the cluster angular radius to be about 7.7 arcmin (= 5.4 pc) from star counts carried out within and outside the cluster field.
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	The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
title_short	The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
title_full	The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
title_fullStr	The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
title_full_unstemmed	The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster
title_sort	old open cluster trumpler 5: a reddened, metal-poor anticentre cluster
url	http://hdl.handle.net/20.500.12110/paper_00358711_v349_n2_p641_Piatti
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The old open cluster Trumpler 5: A reddened, metal-poor anticentre cluster

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