Blue and yellow long period variables in the direction of the Small Magellanic Cloud

Autores
Mennickent, R.; Cidale, Lydia Sonia; Pietrzynski, G.; Gieren, W.; Sabogal, B.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aims. We investigate the nature of a sample of 17 long-term periodic variables in the direction of the Small Magellanic Cloud. Methods. Based on new spectroscopic data, we determined spectral types, radial velocities, absolute magnitudes, and colors for these stars. We present a refined discussion of their OGLE light curves along with an analysis of their 2MASS photometry. Results. Most stars turned out to be B-A giants members of the Small Magellanic Cloud. We find a new interacting eclipsing binary with a period of 184 days and two new early-type ellipsoidal variables. One of our objects is the ROSAT source RX J0058.2-7231. We analyzed 11-years of data for this Be X-ray binary finding that their photometric period varies by ∼4% quasiperiodically, on a time scale of ∼1200 days. We find evidence of multiple photometric periods in 2 Ae-type and 1 late-Be type stars. The case of OGLE00445466-7328029 is especially interesting, as this late-type Be star shows a beating phenomenon primarily caused by two closely-spaced frequencies, 0.05733 c/d (17.44 d) and 0.06347 c/d (15.76 d). Four other emission-line objects show stable long- term periodicities and probably correspond to Be-star binaries. Transient photometric periods are only found in 4 non-emission early-type stars.
Fil: Mennickent, R.. Universidad de Concepción; Chile
Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Pietrzynski, G.. Warsaw University Observatory; Polonia
Fil: Gieren, W.. Universidad de Concepción; Chile
Fil: Sabogal, B.. Universidad de Concepción; Chile
Materia
Binary stars
Eclipsing binaries
Early type stars
Emission lines
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:11336/38537
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Blue and yellow long period variables in the direction of the Small Magellanic CloudMennickent, R.Cidale, Lydia SoniaPietrzynski, G.Gieren, W.Sabogal, B.Binary starsEclipsing binariesEarly type starsEmission lineshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims. We investigate the nature of a sample of 17 long-term periodic variables in the direction of the Small Magellanic Cloud. Methods. Based on new spectroscopic data, we determined spectral types, radial velocities, absolute magnitudes, and colors for these stars. We present a refined discussion of their OGLE light curves along with an analysis of their 2MASS photometry. Results. Most stars turned out to be B-A giants members of the Small Magellanic Cloud. We find a new interacting eclipsing binary with a period of 184 days and two new early-type ellipsoidal variables. One of our objects is the ROSAT source RX J0058.2-7231. We analyzed 11-years of data for this Be X-ray binary finding that their photometric period varies by ∼4% quasiperiodically, on a time scale of ∼1200 days. We find evidence of multiple photometric periods in 2 Ae-type and 1 late-Be type stars. The case of OGLE00445466-7328029 is especially interesting, as this late-type Be star shows a beating phenomenon primarily caused by two closely-spaced frequencies, 0.05733 c/d (17.44 d) and 0.06347 c/d (15.76 d). Four other emission-line objects show stable long- term periodicities and probably correspond to Be-star binaries. Transient photometric periods are only found in 4 non-emission early-type stars.Fil: Mennickent, R.. Universidad de Concepción; ChileFil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Pietrzynski, G.. Warsaw University Observatory; PoloniaFil: Gieren, W.. Universidad de Concepción; ChileFil: Sabogal, B.. Universidad de Concepción; ChileEDP Sciences2006-10info: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/11336/38537Mennickent, R.; Cidale, Lydia Sonia; Pietrzynski, G.; Gieren, W.; Sabogal, B.; Blue and yellow long period variables in the direction of the Small Magellanic Cloud; EDP Sciences; Astronomy and Astrophysics; 457; 10-2006; 949-9610004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065361info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2006/39/aa5361-06/aa5361-06.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:46:41Zoai:ri.conicet.gov.ar:11336/38537instacron: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:34982025-09-29 10:46:42.048CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Blue and yellow long period variables in the direction of the Small Magellanic Cloud
title Blue and yellow long period variables in the direction of the Small Magellanic Cloud
spellingShingle Blue and yellow long period variables in the direction of the Small Magellanic Cloud
Mennickent, R.
Binary stars
Eclipsing binaries
Early type stars
Emission lines
title_short Blue and yellow long period variables in the direction of the Small Magellanic Cloud
title_full Blue and yellow long period variables in the direction of the Small Magellanic Cloud
title_fullStr Blue and yellow long period variables in the direction of the Small Magellanic Cloud
title_full_unstemmed Blue and yellow long period variables in the direction of the Small Magellanic Cloud
title_sort Blue and yellow long period variables in the direction of the Small Magellanic Cloud
dc.creator.none.fl_str_mv Mennickent, R.
Cidale, Lydia Sonia
Pietrzynski, G.
Gieren, W.
Sabogal, B.
author Mennickent, R.
author_facet Mennickent, R.
Cidale, Lydia Sonia
Pietrzynski, G.
Gieren, W.
Sabogal, B.
author_role author
author2 Cidale, Lydia Sonia
Pietrzynski, G.
Gieren, W.
Sabogal, B.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Binary stars
Eclipsing binaries
Early type stars
Emission lines
topic Binary stars
Eclipsing binaries
Early type stars
Emission lines
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Aims. We investigate the nature of a sample of 17 long-term periodic variables in the direction of the Small Magellanic Cloud. Methods. Based on new spectroscopic data, we determined spectral types, radial velocities, absolute magnitudes, and colors for these stars. We present a refined discussion of their OGLE light curves along with an analysis of their 2MASS photometry. Results. Most stars turned out to be B-A giants members of the Small Magellanic Cloud. We find a new interacting eclipsing binary with a period of 184 days and two new early-type ellipsoidal variables. One of our objects is the ROSAT source RX J0058.2-7231. We analyzed 11-years of data for this Be X-ray binary finding that their photometric period varies by ∼4% quasiperiodically, on a time scale of ∼1200 days. We find evidence of multiple photometric periods in 2 Ae-type and 1 late-Be type stars. The case of OGLE00445466-7328029 is especially interesting, as this late-type Be star shows a beating phenomenon primarily caused by two closely-spaced frequencies, 0.05733 c/d (17.44 d) and 0.06347 c/d (15.76 d). Four other emission-line objects show stable long- term periodicities and probably correspond to Be-star binaries. Transient photometric periods are only found in 4 non-emission early-type stars.
Fil: Mennickent, R.. Universidad de Concepción; Chile
Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Pietrzynski, G.. Warsaw University Observatory; Polonia
Fil: Gieren, W.. Universidad de Concepción; Chile
Fil: Sabogal, B.. Universidad de Concepción; Chile
description Aims. We investigate the nature of a sample of 17 long-term periodic variables in the direction of the Small Magellanic Cloud. Methods. Based on new spectroscopic data, we determined spectral types, radial velocities, absolute magnitudes, and colors for these stars. We present a refined discussion of their OGLE light curves along with an analysis of their 2MASS photometry. Results. Most stars turned out to be B-A giants members of the Small Magellanic Cloud. We find a new interacting eclipsing binary with a period of 184 days and two new early-type ellipsoidal variables. One of our objects is the ROSAT source RX J0058.2-7231. We analyzed 11-years of data for this Be X-ray binary finding that their photometric period varies by ∼4% quasiperiodically, on a time scale of ∼1200 days. We find evidence of multiple photometric periods in 2 Ae-type and 1 late-Be type stars. The case of OGLE00445466-7328029 is especially interesting, as this late-type Be star shows a beating phenomenon primarily caused by two closely-spaced frequencies, 0.05733 c/d (17.44 d) and 0.06347 c/d (15.76 d). Four other emission-line objects show stable long- term periodicities and probably correspond to Be-star binaries. Transient photometric periods are only found in 4 non-emission early-type stars.
publishDate 2006
dc.date.none.fl_str_mv 2006-10
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/11336/38537
Mennickent, R.; Cidale, Lydia Sonia; Pietrzynski, G.; Gieren, W.; Sabogal, B.; Blue and yellow long period variables in the direction of the Small Magellanic Cloud; EDP Sciences; Astronomy and Astrophysics; 457; 10-2006; 949-961
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/38537
identifier_str_mv Mennickent, R.; Cidale, Lydia Sonia; Pietrzynski, G.; Gieren, W.; Sabogal, B.; Blue and yellow long period variables in the direction of the Small Magellanic Cloud; EDP Sciences; Astronomy and Astrophysics; 457; 10-2006; 949-961
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/doi/10.1051/0004-6361:20065361
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2006/39/aa5361-06/aa5361-06.html
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 13.070432

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