Pismis 20: One or two clusters?

We present UBVRI 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 Pmax (4.31 and 6.08% respectively). Although in the literature these stars ar...

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Autores principales: Orsatti, A.M., Vega, E.I., Marraco, H.G.
Formato: JOUR
Materias:
ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Galaxies
Light polarization
Photometry
Polarimeters
Photopolarimeter
Star cluster
Astrophysics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v408_n1_p135_Orsatti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00046361_v408_n1_p135_Orsatti
record_format dspace
spelling todo:paper_00046361_v408_n1_p135_Orsatti2023-10-03T14:00:04Z Pismis 20: One or two clusters? Orsatti, A.M. Vega, E.I. Marraco, H.G. ISM: dust, extinction Open clusters and associations: individual: Pis20 Stars: individual: WR67 Technique: polarimetric Galaxies Light polarization Photometry Polarimeters Photopolarimeter Star cluster Astrophysics We present UBVRI 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 Pmax (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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v408_n1_p135_Orsatti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Galaxies
Light polarization
Photometry
Polarimeters
Photopolarimeter
Star cluster
Astrophysics
spellingShingle ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Galaxies
Light polarization
Photometry
Polarimeters
Photopolarimeter
Star cluster
Astrophysics
Orsatti, A.M.
Vega, E.I.
Marraco, H.G.
Pismis 20: One or two clusters?
topic_facet ISM: dust, extinction
Open clusters and associations: individual: Pis20
Stars: individual: WR67
Technique: polarimetric
Galaxies
Light polarization
Photometry
Polarimeters
Photopolarimeter
Star cluster
Astrophysics
description We present UBVRI 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 Pmax (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 JOUR
author Orsatti, A.M.
Vega, E.I.
Marraco, H.G.
author_facet Orsatti, A.M.
Vega, E.I.
Marraco, H.G.
author_sort Orsatti, A.M.
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?
url http://hdl.handle.net/20.500.12110/paper_00046361_v408_n1_p135_Orsatti
work_keys_str_mv AT orsattiam pismis20oneortwoclusters
AT vegaei pismis20oneortwoclusters
AT marracohg pismis20oneortwoclusters
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