A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ

We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties an...

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Autores principales: Orsatti, A.M., Vega, E.I., Marraco, H.G.
Formato: JOUR
Materias:
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v380_n1_p130_Orsatti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00046361_v380_n1_p130_Orsatti
record_format dspace
spelling todo:paper_00046361_v380_n1_p130_Orsatti2023-10-03T13:59:58Z A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ Orsatti, A.M. Vega, E.I. Marraco, H.G. Cepheids ISM: dust, extinction Open clusters and associations: individual (Lyngå 6) Stars: individual (TW Nor) We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v380_n1_p130_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 Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
spellingShingle Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
Orsatti, A.M.
Vega, E.I.
Marraco, H.G.
A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
topic_facet Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
description We present UBVRI polarimetric observations of stars belonging to the small open cluster Lyngå 6 and of TW Nor, a Cepheid which can be seen near the center of the grouping. The wavelength of maximum polarization is computed and then analyzed in the context of its relation to the optical properties and characteristics particle size distribution of the grains responsible for the polarization. The amount and direction of linear polarization is also computed. Results indicate a mean polarization efficiency close to the value found for the interstellar medium. Two out of seven members of Lyngå 6 present indications of intrinsic polarization in their measures. We conclude that part of the polarization detected in the light from members of the cluster comes from a dust cloud located in the Local arm, at a distance of about 1 kpc. In general, polarization measurements do not support the membership of TW Nor to Lyngå 6.
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 A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_short A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_full A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_fullStr A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_full_unstemmed A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
title_sort polarimetric view of the open cluster lyngå 6 and the cepheid tw normæ
url http://hdl.handle.net/20.500.12110/paper_00046361_v380_n1_p130_Orsatti
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AT vegaei apolarimetricviewoftheopenclusterlynga6andthecepheidtwnormæ
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AT orsattiam polarimetricviewoftheopenclusterlynga6andthecepheidtwnormæ
AT vegaei polarimetricviewoftheopenclusterlynga6andthecepheidtwnormæ
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