Optical polarimetry of infrared excess stars

Autores
Chavero, Carolina Andrea; Gomez, Mercedes Nieves; Whitney, B. A.; Saffe, Carlos
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present UBRVI polarimetry measurements for a group of 38 IRAS infrared excess stars and complement these observations with V-band data taken from the literature for 87 additional objects. After correcting the observed values by the interstellar contribution, we find that 48% of the analyzed sample has polarization excess. In addition, the polarization of these stars may correlate with infrared color excesses, particularly at 60 and 100 μm. We caution, however, that poor IRAS data quality at longer wavelengths affects this correlation. We analyze the wavelength dependence of the linear polarization of 15 polarized objects in relation to Serkowski´s empirical interstellar law. We find that for 6 to 7 objects (depending on the interstellar model) the measured polarization differs significantly from the empirical interstellar law, suggesting an intrinsic origin. We analyze the polarimetry distribution of IRAS infrared excess objects in relation to the Exoplanet host stars (i.e., stars associated with at least one likely planetary mass object). The corresponding polarimetry distributions are different within a high confidence level. Finally, we compare the metallicity distributions of F and G IRAS infrared excess, Exoplanet host and field main sequence stars, and find that F-G IRAS infrared excess objects have metallicities quite similar (although not identical) to field main sequence stars and significantly different from the Exoplanet host group.
Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Gomez, Mercedes Nieves. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Whitney, B. A.. Space Telescope Science Institute; Estados Unidos
Fil: Saffe, Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Materia
stars: circumstellar matter
stars: planetary systems
techniques: photometric
techniques: polarimetric
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/245170
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Optical polarimetry of infrared excess starsChavero, Carolina AndreaGomez, Mercedes NievesWhitney, B. A.Saffe, Carlosstars: circumstellar matterstars: planetary systemstechniques: photometrictechniques: polarimetrichttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present UBRVI polarimetry measurements for a group of 38 IRAS infrared excess stars and complement these observations with V-band data taken from the literature for 87 additional objects. After correcting the observed values by the interstellar contribution, we find that 48% of the analyzed sample has polarization excess. In addition, the polarization of these stars may correlate with infrared color excesses, particularly at 60 and 100 μm. We caution, however, that poor IRAS data quality at longer wavelengths affects this correlation. We analyze the wavelength dependence of the linear polarization of 15 polarized objects in relation to Serkowski´s empirical interstellar law. We find that for 6 to 7 objects (depending on the interstellar model) the measured polarization differs significantly from the empirical interstellar law, suggesting an intrinsic origin. We analyze the polarimetry distribution of IRAS infrared excess objects in relation to the Exoplanet host stars (i.e., stars associated with at least one likely planetary mass object). The corresponding polarimetry distributions are different within a high confidence level. Finally, we compare the metallicity distributions of F and G IRAS infrared excess, Exoplanet host and field main sequence stars, and find that F-G IRAS infrared excess objects have metallicities quite similar (although not identical) to field main sequence stars and significantly different from the Exoplanet host group.Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Gomez, Mercedes Nieves. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Whitney, B. A.. Space Telescope Science Institute; Estados UnidosFil: Saffe, Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaEDP Sciences2006-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/245170Chavero, Carolina Andrea; Gomez, Mercedes Nieves; Whitney, B. A.; Saffe, Carlos; Optical polarimetry of infrared excess stars; EDP Sciences; Astronomy and Astrophysics; 452; 3; 6-2006; 921-9310004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2005/44/aa3452-05/aa3452-05.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20042502info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:08:56Zoai:ri.conicet.gov.ar:11336/245170instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:08:56.973CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Optical polarimetry of infrared excess stars
title Optical polarimetry of infrared excess stars
spellingShingle Optical polarimetry of infrared excess stars
Chavero, Carolina Andrea
stars: circumstellar matter
stars: planetary systems
techniques: photometric
techniques: polarimetric
title_short Optical polarimetry of infrared excess stars
title_full Optical polarimetry of infrared excess stars
title_fullStr Optical polarimetry of infrared excess stars
title_full_unstemmed Optical polarimetry of infrared excess stars
title_sort Optical polarimetry of infrared excess stars
dc.creator.none.fl_str_mv Chavero, Carolina Andrea
Gomez, Mercedes Nieves
Whitney, B. A.
Saffe, Carlos
author Chavero, Carolina Andrea
author_facet Chavero, Carolina Andrea
Gomez, Mercedes Nieves
Whitney, B. A.
Saffe, Carlos
author_role author
author2 Gomez, Mercedes Nieves
Whitney, B. A.
Saffe, Carlos
author2_role author
author
author
dc.subject.none.fl_str_mv stars: circumstellar matter
stars: planetary systems
techniques: photometric
techniques: polarimetric
topic stars: circumstellar matter
stars: planetary systems
techniques: photometric
techniques: polarimetric
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present UBRVI polarimetry measurements for a group of 38 IRAS infrared excess stars and complement these observations with V-band data taken from the literature for 87 additional objects. After correcting the observed values by the interstellar contribution, we find that 48% of the analyzed sample has polarization excess. In addition, the polarization of these stars may correlate with infrared color excesses, particularly at 60 and 100 μm. We caution, however, that poor IRAS data quality at longer wavelengths affects this correlation. We analyze the wavelength dependence of the linear polarization of 15 polarized objects in relation to Serkowski´s empirical interstellar law. We find that for 6 to 7 objects (depending on the interstellar model) the measured polarization differs significantly from the empirical interstellar law, suggesting an intrinsic origin. We analyze the polarimetry distribution of IRAS infrared excess objects in relation to the Exoplanet host stars (i.e., stars associated with at least one likely planetary mass object). The corresponding polarimetry distributions are different within a high confidence level. Finally, we compare the metallicity distributions of F and G IRAS infrared excess, Exoplanet host and field main sequence stars, and find that F-G IRAS infrared excess objects have metallicities quite similar (although not identical) to field main sequence stars and significantly different from the Exoplanet host group.
Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Gomez, Mercedes Nieves. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Whitney, B. A.. Space Telescope Science Institute; Estados Unidos
Fil: Saffe, Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
description We present UBRVI polarimetry measurements for a group of 38 IRAS infrared excess stars and complement these observations with V-band data taken from the literature for 87 additional objects. After correcting the observed values by the interstellar contribution, we find that 48% of the analyzed sample has polarization excess. In addition, the polarization of these stars may correlate with infrared color excesses, particularly at 60 and 100 μm. We caution, however, that poor IRAS data quality at longer wavelengths affects this correlation. We analyze the wavelength dependence of the linear polarization of 15 polarized objects in relation to Serkowski´s empirical interstellar law. We find that for 6 to 7 objects (depending on the interstellar model) the measured polarization differs significantly from the empirical interstellar law, suggesting an intrinsic origin. We analyze the polarimetry distribution of IRAS infrared excess objects in relation to the Exoplanet host stars (i.e., stars associated with at least one likely planetary mass object). The corresponding polarimetry distributions are different within a high confidence level. Finally, we compare the metallicity distributions of F and G IRAS infrared excess, Exoplanet host and field main sequence stars, and find that F-G IRAS infrared excess objects have metallicities quite similar (although not identical) to field main sequence stars and significantly different from the Exoplanet host group.
publishDate 2006
dc.date.none.fl_str_mv 2006-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/245170
Chavero, Carolina Andrea; Gomez, Mercedes Nieves; Whitney, B. A.; Saffe, Carlos; Optical polarimetry of infrared excess stars; EDP Sciences; Astronomy and Astrophysics; 452; 3; 6-2006; 921-931
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/245170
identifier_str_mv Chavero, Carolina Andrea; Gomez, Mercedes Nieves; Whitney, B. A.; Saffe, Carlos; Optical polarimetry of infrared excess stars; EDP Sciences; Astronomy and Astrophysics; 452; 3; 6-2006; 921-931
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2005/44/aa3452-05/aa3452-05.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20042502
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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