NGC 4337: an overlooked old cluster in the inner disc of the Milky Way

Galactic open clusters do not survive long in the high-density regions of the inner Galactic disc. Inside the solar ring only 11 open clusters are known with ages older than 1 Gyr. We show here, basing on deep, high-quality photometry, that NGC 4337, contrary to earlier findings, is indeed an old op...

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Detalles Bibliográficos
Autores principales: Carraro, Giovanni, Giorgi, Edgard Ervar Salvador, Costa, Edgardo, Vázquez, Rubén Ángel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Astronómicas
Open clusters and associations: General
Open clusters and associations: Individual: NGC 4337
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85297
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85297
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Open clusters and associations: General
Open clusters and associations: Individual: NGC 4337
spellingShingle Ciencias Astronómicas
Open clusters and associations: General
Open clusters and associations: Individual: NGC 4337
Carraro, Giovanni
Giorgi, Edgard Ervar Salvador
Costa, Edgardo
Vázquez, Rubén Ángel
NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
topic_facet Ciencias Astronómicas
Open clusters and associations: General
Open clusters and associations: Individual: NGC 4337
description Galactic open clusters do not survive long in the high-density regions of the inner Galactic disc. Inside the solar ring only 11 open clusters are known with ages older than 1 Gyr. We show here, basing on deep, high-quality photometry, that NGC 4337, contrary to earlier findings, is indeed an old open cluster. The cluster is located very close to the conspicuous star cluster Trumpler 20, as well misclassified in the past, and that has received so much attention in recent years. NGC 4337 shows a significant clump of He-burning stars which was not detected previously. Its beautiful colour-magnitude diagram is strikingly similar to the one of the classical old open clusters IC 4651, NGC 752, and NGC 3680, and this suggests similar age and composition. A spectroscopic study is much needed to confirm our findings. This, in turn, would also allow us to better define the inner disc radial abundance gradient and its temporal evolution. To this aim, a list of clump star candidates is provided.
format Articulo
Articulo
author Carraro, Giovanni
Giorgi, Edgard Ervar Salvador
Costa, Edgardo
Vázquez, Rubén Ángel
author_facet Carraro, Giovanni
Giorgi, Edgard Ervar Salvador
Costa, Edgardo
Vázquez, Rubén Ángel
author_sort Carraro, Giovanni
title NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
title_short NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
title_full NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
title_fullStr NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
title_full_unstemmed NGC 4337: an overlooked old cluster in the inner disc of the Milky Way
title_sort ngc 4337: an overlooked old cluster in the inner disc of the milky way
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85297
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AT costaedgardo ngc4337anoverlookedoldclusterintheinnerdiscofthemilkyway
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