Detection of a young stellar population in the background of open clusters in the third galactic quadrant

We report the detection of a young stellar population (≤100 Myr) in the background of nine young open clusters belonging to a homogenous sample of 30 star clusters in the third Galactic quadrant (at 217° ≤ l ≤ 260°). Deep and accurate UBVRI photometry allows us to measure model-independent age and d...

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Detalles Bibliográficos
Autores principales: Carraro, Giovanni, Vázquez, Rubén Ángel, Moitinho, André, Baume, Gustavo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Astronómicas
Galaxy: structure
Hertzsprung-Russell diagram
Open clusters and associations: general
Stars: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83119
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83119
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
Galaxy: structure
Hertzsprung-Russell diagram
Open clusters and associations: general
Stars: general
spellingShingle Ciencias Astronómicas
Galaxy: structure
Hertzsprung-Russell diagram
Open clusters and associations: general
Stars: general
Carraro, Giovanni
Vázquez, Rubén Ángel
Moitinho, André
Baume, Gustavo
Detection of a young stellar population in the background of open clusters in the third galactic quadrant
topic_facet Ciencias Astronómicas
Galaxy: structure
Hertzsprung-Russell diagram
Open clusters and associations: general
Stars: general
description We report the detection of a young stellar population (≤100 Myr) in the background of nine young open clusters belonging to a homogenous sample of 30 star clusters in the third Galactic quadrant (at 217° ≤ l ≤ 260°). Deep and accurate UBVRI photometry allows us to measure model-independent age and distance for the clusters and the background population with high confidence. This population is exactly the same population (the blue plume) recently detected in three intermediate-age open clusters and suggested to be a ≤1-2 Gyr old population belonging to the Canis Major (CMa) overdensity (Bellazzini et al.; Martinez-Delgado et al.). However, we find that the young population in those three clusters and in six clusters of our sample follows the pattern of the Norma-Cygnus spiral arm as defined by CO clouds remarkably well, while in the other three program clusters it lies in the Perseus arm. We finally provide one example (out of 21) of a cluster that does not show any background population, demonstrating that this population is not ubiquitous toward CMa.
format Articulo
Articulo
author Carraro, Giovanni
Vázquez, Rubén Ángel
Moitinho, André
Baume, Gustavo
author_facet Carraro, Giovanni
Vázquez, Rubén Ángel
Moitinho, André
Baume, Gustavo
author_sort Carraro, Giovanni
title Detection of a young stellar population in the background of open clusters in the third galactic quadrant
title_short Detection of a young stellar population in the background of open clusters in the third galactic quadrant
title_full Detection of a young stellar population in the background of open clusters in the third galactic quadrant
title_fullStr Detection of a young stellar population in the background of open clusters in the third galactic quadrant
title_full_unstemmed Detection of a young stellar population in the background of open clusters in the third galactic quadrant
title_sort detection of a young stellar population in the background of open clusters in the third galactic quadrant
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/83119
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AT vazquezrubenangel detectionofayoungstellarpopulationinthebackgroundofopenclustersinthethirdgalacticquadrant
AT moitinhoandre detectionofayoungstellarpopulationinthebackgroundofopenclustersinthethirdgalacticquadrant
AT baumegustavo detectionofayoungstellarpopulationinthebackgroundofopenclustersinthethirdgalacticquadrant
bdutipo_str Repositorios
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