Pismis 20: One or two clusters?

We present <i>UBVRI</i> polarimetric observations of stars in the direction of the open cluster Pismis 20 and WR 67. It is found that the observed members segregate polarimetrically into two groups, with different associated mean P<SUB>max</SUB> (4.31 and 6.08% respectively)....

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Detalles Bibliográficos
Autores principales: Orsatti, Ana María, Vega, Ema Irene, Marraco, Hugo Gustavo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2003
Materias:
Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84862
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84862
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
ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
spellingShingle Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
Pismis 20: One or two clusters?
topic_facet Ciencias Astronómicas
ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
description We present <i>UBVRI</i> polarimetric observations of stars in the direction of the open cluster Pismis 20 and WR 67. It is found that the observed members segregate polarimetrically into two groups, with different associated mean P<SUB>max</SUB> (4.31 and 6.08% respectively). Although in the literature these stars are considered as members of the same cluster, the polarized light from these groups clearly differs. There are two possible explanations: very efficient polarizing dust particles exists between certain members of the cluster; or else Pismis 20 is composed of different groupings superimposed along the line of sight. WR 67 belongs to the group more affected by the dust.
format Articulo
Articulo
author Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
author_facet Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
author_sort Orsatti, Ana María
title Pismis 20: One or two clusters?
title_short Pismis 20: One or two clusters?
title_full Pismis 20: One or two clusters?
title_fullStr Pismis 20: One or two clusters?
title_full_unstemmed Pismis 20: One or two clusters?
title_sort pismis 20: one or two clusters?
publishDate 2003
url http://sedici.unlp.edu.ar/handle/10915/84862
work_keys_str_mv AT orsattianamaria pismis20oneortwoclusters
AT vegaemairene pismis20oneortwoclusters
AT marracohugogustavo pismis20oneortwoclusters
bdutipo_str Repositorios
_version_ 1764820488656257026

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