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, Ana María, Vega, Ema Irene, Marraco, Hugo Gustavo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83590
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83590
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
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
spellingShingle Ciencias Astronómicas
Cepheids
ISM: dust, extinction
Open clusters and associations: individual (Lyngå 6)
Stars: individual (TW Nor)
Orsatti, Ana María
Vega, Ema Irene
Marraco, Hugo Gustavo
A polarimetric view of the open cluster Lyngå 6 and the Cepheid TW Normæ
topic_facet Ciencias Astronómicas
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 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 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
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/83590
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