Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898

In this paper we present a study and comparison of the star formation rates (SFRs) in the fields around NGC 1898 and NGC 2154, two intermediate-age star clusters located in very different regions of the Large Magellanic Cloud (LMC). We also derive ages for NGC 1898, and seven minor clusters which ha...

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Detalles Bibliográficos
Autores principales: Chiosi, E., Baume, Gustavo, Carraro, G., Costa, E, Vallenari, A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Astronómicas
Galaxies:star clusters:individual:ngc 2154, ngc 1898
Galaxies:stellar content
Magellanic clouds
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84352
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84352
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
Galaxies:star clusters:individual:ngc 2154, ngc 1898
Galaxies:stellar content
Magellanic clouds
spellingShingle Ciencias Astronómicas
Galaxies:star clusters:individual:ngc 2154, ngc 1898
Galaxies:stellar content
Magellanic clouds
Chiosi, E.
Baume, Gustavo
Carraro, G.
Costa, E
Vallenari, A.
Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
topic_facet Ciencias Astronómicas
Galaxies:star clusters:individual:ngc 2154, ngc 1898
Galaxies:stellar content
Magellanic clouds
description In this paper we present a study and comparison of the star formation rates (SFRs) in the fields around NGC 1898 and NGC 2154, two intermediate-age star clusters located in very different regions of the Large Magellanic Cloud (LMC). We also derive ages for NGC 1898, and seven minor clusters which happen to fall in the field of NGC 1898, for which basic parameters were previously unknown. We do not focus on NGC 2154, because this cluster was already investigated by Baume et al. The ages of the clusters were derived by means of the isochrone fitting method on their <i>clean</i> colour-magnitude diagrams. Two distinct populations of clusters were found: one cluster (NGC 2154) has a mean age of 1.7 Gyr, with indication of extended star formation over roughly a 1 Gyr period, while all the others have ages between 100 and 200 Myr. The SFRs of the adjacent fields were inferred using the downhill-simplex algorithm. Both SFRs show enhancements at 200, 400, 800 Myr, and at 1, 6 and 8 Gyr. These bursts in the SFR are probably the result of dynamical interactions between the Magellanic Clouds (MCs), and between the MCs and the Milky Way.
format Articulo
Articulo
author Chiosi, E.
Baume, Gustavo
Carraro, G.
Costa, E
Vallenari, A.
author_facet Chiosi, E.
Baume, Gustavo
Carraro, G.
Costa, E
Vallenari, A.
author_sort Chiosi, E.
title Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
title_short Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
title_full Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
title_fullStr Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
title_full_unstemmed Stellar populations in the fields surrounding the LMC clusters NGC 2154 and NGC 1898
title_sort stellar populations in the fields surrounding the lmc clusters ngc 2154 and ngc 1898
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84352
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AT baumegustavo stellarpopulationsinthefieldssurroundingthelmcclustersngc2154andngc1898
AT carrarog stellarpopulationsinthefieldssurroundingthelmcclustersngc2154andngc1898
AT costae stellarpopulationsinthefieldssurroundingthelmcclustersngc2154andngc1898
AT vallenaria stellarpopulationsinthefieldssurroundingthelmcclustersngc2154andngc1898
bdutipo_str Repositorios
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