SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption

Autores
Jaeger, T. de; Anderson, J. P.; Pignata, G.; Hamuy, M.; Kankare, E.; Stritzinger, M. D.; Benetti, S.; Bufano, F.; Elias Rosa, N.; Folatelli, Gastón; Förster, F.; González Gaitán, S.; Gutiérrez, C. P.; Inserra, C.; Kotak, R.; Lira, P.; Morrell, Nidia Irene; Taddia, F.; Tomasella, L.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present optical photometry and spectroscopy of the optical transient SN 2011A. Our data span 140 days after discovery including BVRI u′g′r′i′z′ photometry and 11 epochs of optical spectroscopy. Originally classified as a type IIn supernova (SN IIn) due to the presence of narrow Hα emission, this object shows exceptional characteristics. First, the light curve shows a double plateau, a property only observed before in the impostor SN 1997bs. Second, SN 2011A has a very low luminosity (MV=-15.72), placing it between normal luminous SNe IIn and SN impostors. Third, SN 2011A shows low velocity and high equivalent width absorption close to the sodium doublet, which increases with time and is most likely of circumstellar origin. This evolution is also accompanied by a change in line profile; when the absorption becomes stronger, a P Cygni profile appears. We discuss SN 2011A in the context of interacting SNe IIn and SN impostors, which appears to confirm the uniqueness of this transient. While we favor an impostor origin for SN 2011A, we highlight the difficulty in differentiating between terminal and non-terminal interacting transients.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
circumstellar matter
stars: mass loss
supernovae: general
supernovae: individual (2011A)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/86203
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/86203
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorptionJaeger, T. deAnderson, J. P.Pignata, G.Hamuy, M.Kankare, E.Stritzinger, M. D.Benetti, S.Bufano, F.Elias Rosa, N.Folatelli, GastónFörster, F.González Gaitán, S.Gutiérrez, C. P.Inserra, C.Kotak, R.Lira, P.Morrell, Nidia IreneTaddia, F.Tomasella, L.Ciencias Astronómicascircumstellar matterstars: mass losssupernovae: generalsupernovae: individual (2011A)We present optical photometry and spectroscopy of the optical transient SN 2011A. Our data span 140 days after discovery including BVRI u′g′r′i′z′ photometry and 11 epochs of optical spectroscopy. Originally classified as a type IIn supernova (SN IIn) due to the presence of narrow Hα emission, this object shows exceptional characteristics. First, the light curve shows a double plateau, a property only observed before in the impostor SN 1997bs. Second, SN 2011A has a very low luminosity (M<SUB>V</SUB>=-15.72), placing it between normal luminous SNe IIn and SN impostors. Third, SN 2011A shows low velocity and high equivalent width absorption close to the sodium doublet, which increases with time and is most likely of circumstellar origin. This evolution is also accompanied by a change in line profile; when the absorption becomes stronger, a P Cygni profile appears. We discuss SN 2011A in the context of interacting SNe IIn and SN impostors, which appears to confirm the uniqueness of this transient. While we favor an impostor origin for SN 2011A, we highlight the difficulty in differentiating between terminal and non-terminal interacting transients.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/86203enginfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/807/1/63info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-03-31T12:05:53Zoai:sedici.unlp.edu.ar:10915/86203Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-03-31 12:05:53.316SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
title SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
spellingShingle SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
Jaeger, T. de
Ciencias Astronómicas
circumstellar matter
stars: mass loss
supernovae: general
supernovae: individual (2011A)
title_short SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
title_full SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
title_fullStr SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
title_full_unstemmed SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
title_sort SN 2011A: a low-luminosity interacting transient with a double plateau and strong sodium absorption
dc.creator.none.fl_str_mv Jaeger, T. de
Anderson, J. P.
Pignata, G.
Hamuy, M.
Kankare, E.
Stritzinger, M. D.
Benetti, S.
Bufano, F.
Elias Rosa, N.
Folatelli, Gastón
Förster, F.
González Gaitán, S.
Gutiérrez, C. P.
Inserra, C.
Kotak, R.
Lira, P.
Morrell, Nidia Irene
Taddia, F.
Tomasella, L.
author Jaeger, T. de
author_facet Jaeger, T. de
Anderson, J. P.
Pignata, G.
Hamuy, M.
Kankare, E.
Stritzinger, M. D.
Benetti, S.
Bufano, F.
Elias Rosa, N.
Folatelli, Gastón
Förster, F.
González Gaitán, S.
Gutiérrez, C. P.
Inserra, C.
Kotak, R.
Lira, P.
Morrell, Nidia Irene
Taddia, F.
Tomasella, L.
author_role author
author2 Anderson, J. P.
Pignata, G.
Hamuy, M.
Kankare, E.
Stritzinger, M. D.
Benetti, S.
Bufano, F.
Elias Rosa, N.
Folatelli, Gastón
Förster, F.
González Gaitán, S.
Gutiérrez, C. P.
Inserra, C.
Kotak, R.
Lira, P.
Morrell, Nidia Irene
Taddia, F.
Tomasella, L.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
circumstellar matter
stars: mass loss
supernovae: general
supernovae: individual (2011A)
topic Ciencias Astronómicas
circumstellar matter
stars: mass loss
supernovae: general
supernovae: individual (2011A)
dc.description.none.fl_txt_mv We present optical photometry and spectroscopy of the optical transient SN 2011A. Our data span 140 days after discovery including BVRI u′g′r′i′z′ photometry and 11 epochs of optical spectroscopy. Originally classified as a type IIn supernova (SN IIn) due to the presence of narrow Hα emission, this object shows exceptional characteristics. First, the light curve shows a double plateau, a property only observed before in the impostor SN 1997bs. Second, SN 2011A has a very low luminosity (M<SUB>V</SUB>=-15.72), placing it between normal luminous SNe IIn and SN impostors. Third, SN 2011A shows low velocity and high equivalent width absorption close to the sodium doublet, which increases with time and is most likely of circumstellar origin. This evolution is also accompanied by a change in line profile; when the absorption becomes stronger, a P Cygni profile appears. We discuss SN 2011A in the context of interacting SNe IIn and SN impostors, which appears to confirm the uniqueness of this transient. While we favor an impostor origin for SN 2011A, we highlight the difficulty in differentiating between terminal and non-terminal interacting transients.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We present optical photometry and spectroscopy of the optical transient SN 2011A. Our data span 140 days after discovery including BVRI u′g′r′i′z′ photometry and 11 epochs of optical spectroscopy. Originally classified as a type IIn supernova (SN IIn) due to the presence of narrow Hα emission, this object shows exceptional characteristics. First, the light curve shows a double plateau, a property only observed before in the impostor SN 1997bs. Second, SN 2011A has a very low luminosity (M<SUB>V</SUB>=-15.72), placing it between normal luminous SNe IIn and SN impostors. Third, SN 2011A shows low velocity and high equivalent width absorption close to the sodium doublet, which increases with time and is most likely of circumstellar origin. This evolution is also accompanied by a change in line profile; when the absorption becomes stronger, a P Cygni profile appears. We discuss SN 2011A in the context of interacting SNe IIn and SN impostors, which appears to confirm the uniqueness of this transient. While we favor an impostor origin for SN 2011A, we highlight the difficulty in differentiating between terminal and non-terminal interacting transients.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/86203
url http://sedici.unlp.edu.ar/handle/10915/86203
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-637X
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/807/1/63
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.231807

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