Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy
- Autores
- Kuncarayakti, Hanindyo; Folatelli, Gaston; Maeda, Keiichi; Dessart, Luc; Jerkstrand, Anders; Anderson, Joseph; Aoki, Kentaro; Bersten, Melina Cecilia; Ferrari, Lucía; Galbany, Lluís; García, Federico; Gutiérrez, Claudia P.; Hattori, Takashi; Kawabata, Koji S.; Kravtsov, Timo; Lyman, Joseph D.; Mattila, Seppo; Felipe Olivares, E.; Sánchez, Sebastian F.; Van Dyk, Schuyler D.
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Spectral observations of the type-IIb supernova (SN) 2016gkg at 300-800 days are reported. The spectra show nebular characteristics, revealing emission from the progenitor star´s metal-rich core and providing clues to the kinematics and physical conditions of the explosion. The nebular spectra are dominated by emission lines of [O i] λλ6300, 6364 and [Ca ii] λλ7292, 7324. Other notable, albeit weaker, emission lines include Mg I] λ4571, [Fe ii] λ7155, O I λ7774, Ca II triplet, and a broad, boxy feature at the location of Hα. Unlike in other stripped-envelope SNe, the [O i] doublet is clearly resolved due to the presence of strong narrow components. The doublet shows an unprecedented emission line profile consisting of at least three components for each [O i]λ6300, 6364 line: a broad component (width ∼2000 km s-1), and a pair of narrow blue and red components (width ∼300 km s-1) mirrored against the rest velocity. The narrow component appears also in other lines, and is conspicuous in [O i]. This indicates the presence of multiple distinct kinematic components of material at low and high velocities. The low-velocity components are likely to be produced by a dense, slow-moving emitting region near the center, while the broad components are emitted over a larger volume. These observations suggest an asymmetric explosion, supporting the idea of two-component ejecta that influence the resulting late-time spectra and light curves. SN 2016gkg thus presents striking evidence for significant asymmetry in a standard-energy SN explosion. The presence of material at low velocity, which is not predicted in 1D simulations, emphasizes the importance of multidimensional explosion modeling of SNe.
Fil: Kuncarayakti, Hanindyo. Tuorla Observatory; Finlandia
Fil: Folatelli, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Maeda, Keiichi. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Dessart, Luc. Sorbonne Université; Francia
Fil: Jerkstrand, Anders. Stockholm University; Suecia
Fil: Anderson, Joseph. European Southern Observatory Chile; Chile
Fil: Aoki, Kentaro. National Astronomical Observatory of Japan; Japón
Fil: Bersten, Melina Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Ferrari, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Galbany, Lluís. Universidad de Granada; España
Fil: García, Federico. University of Groningen; Países Bajos
Fil: Gutiérrez, Claudia P.. University of Southampton; Reino Unido
Fil: Hattori, Takashi. National Astronomical Observatory of Japan; Japón
Fil: Kawabata, Koji S.. Hiroshima University; Japón
Fil: Kravtsov, Timo. University of Turku; Finlandia
Fil: Lyman, Joseph D.. University of Warwick; Reino Unido
Fil: Mattila, Seppo. University of Turku; Finlandia
Fil: Felipe Olivares, E.. Universidad de Atacama; Chile
Fil: Sánchez, Sebastian F.. Universidad Nacional Autónoma de México; México
Fil: Van Dyk, Schuyler D.. Caltech/IPAC; Estados Unidos - Materia
-
Core-collapse supernovae
Solar and Stellar Astrophysics
supernovae: general
supernovae: individual (SN 2016gkg)
stars: massive
stars: interiors - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/147537
Ver los metadatos del registro completo
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Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular SpectroscopyKuncarayakti, HanindyoFolatelli, GastonMaeda, KeiichiDessart, LucJerkstrand, AndersAnderson, JosephAoki, KentaroBersten, Melina CeciliaFerrari, LucíaGalbany, LluísGarcía, FedericoGutiérrez, Claudia P.Hattori, TakashiKawabata, Koji S.Kravtsov, TimoLyman, Joseph D.Mattila, SeppoFelipe Olivares, E.Sánchez, Sebastian F.Van Dyk, Schuyler D.Core-collapse supernovaeSolar and Stellar Astrophysicssupernovae: generalsupernovae: individual (SN 2016gkg)stars: massivestars: interiorshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Spectral observations of the type-IIb supernova (SN) 2016gkg at 300-800 days are reported. The spectra show nebular characteristics, revealing emission from the progenitor star´s metal-rich core and providing clues to the kinematics and physical conditions of the explosion. The nebular spectra are dominated by emission lines of [O i] λλ6300, 6364 and [Ca ii] λλ7292, 7324. Other notable, albeit weaker, emission lines include Mg I] λ4571, [Fe ii] λ7155, O I λ7774, Ca II triplet, and a broad, boxy feature at the location of Hα. Unlike in other stripped-envelope SNe, the [O i] doublet is clearly resolved due to the presence of strong narrow components. The doublet shows an unprecedented emission line profile consisting of at least three components for each [O i]λ6300, 6364 line: a broad component (width ∼2000 km s-1), and a pair of narrow blue and red components (width ∼300 km s-1) mirrored against the rest velocity. The narrow component appears also in other lines, and is conspicuous in [O i]. This indicates the presence of multiple distinct kinematic components of material at low and high velocities. The low-velocity components are likely to be produced by a dense, slow-moving emitting region near the center, while the broad components are emitted over a larger volume. These observations suggest an asymmetric explosion, supporting the idea of two-component ejecta that influence the resulting late-time spectra and light curves. SN 2016gkg thus presents striking evidence for significant asymmetry in a standard-energy SN explosion. The presence of material at low velocity, which is not predicted in 1D simulations, emphasizes the importance of multidimensional explosion modeling of SNe.Fil: Kuncarayakti, Hanindyo. Tuorla Observatory; FinlandiaFil: Folatelli, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Maeda, Keiichi. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Dessart, Luc. Sorbonne Université; FranciaFil: Jerkstrand, Anders. Stockholm University; SueciaFil: Anderson, Joseph. European Southern Observatory Chile; ChileFil: Aoki, Kentaro. National Astronomical Observatory of Japan; JapónFil: Bersten, Melina Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Ferrari, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Galbany, Lluís. Universidad de Granada; EspañaFil: García, Federico. University of Groningen; Países BajosFil: Gutiérrez, Claudia P.. University of Southampton; Reino UnidoFil: Hattori, Takashi. National Astronomical Observatory of Japan; JapónFil: Kawabata, Koji S.. Hiroshima University; JapónFil: Kravtsov, Timo. University of Turku; FinlandiaFil: Lyman, Joseph D.. University of Warwick; Reino UnidoFil: Mattila, Seppo. University of Turku; FinlandiaFil: Felipe Olivares, E.. Universidad de Atacama; ChileFil: Sánchez, Sebastian F.. Universidad Nacional Autónoma de México; MéxicoFil: Van Dyk, Schuyler D.. Caltech/IPAC; Estados UnidosIOP Publishing2020-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/147537Kuncarayakti, Hanindyo; Folatelli, Gaston; Maeda, Keiichi; Dessart, Luc; Jerkstrand, Anders; et al.; Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy; IOP Publishing; Astrophysical Journal; 902; 2; 10-2020; 1-200004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/abb4e7info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:46Zoai:ri.conicet.gov.ar:11336/147537instacron: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 09:50:46.923CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| title |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| spellingShingle |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy Kuncarayakti, Hanindyo Core-collapse supernovae Solar and Stellar Astrophysics supernovae: general supernovae: individual (SN 2016gkg) stars: massive stars: interiors |
| title_short |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| title_full |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| title_fullStr |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| title_full_unstemmed |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| title_sort |
Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy |
| dc.creator.none.fl_str_mv |
Kuncarayakti, Hanindyo Folatelli, Gaston Maeda, Keiichi Dessart, Luc Jerkstrand, Anders Anderson, Joseph Aoki, Kentaro Bersten, Melina Cecilia Ferrari, Lucía Galbany, Lluís García, Federico Gutiérrez, Claudia P. Hattori, Takashi Kawabata, Koji S. Kravtsov, Timo Lyman, Joseph D. Mattila, Seppo Felipe Olivares, E. Sánchez, Sebastian F. Van Dyk, Schuyler D. |
| author |
Kuncarayakti, Hanindyo |
| author_facet |
Kuncarayakti, Hanindyo Folatelli, Gaston Maeda, Keiichi Dessart, Luc Jerkstrand, Anders Anderson, Joseph Aoki, Kentaro Bersten, Melina Cecilia Ferrari, Lucía Galbany, Lluís García, Federico Gutiérrez, Claudia P. Hattori, Takashi Kawabata, Koji S. Kravtsov, Timo Lyman, Joseph D. Mattila, Seppo Felipe Olivares, E. Sánchez, Sebastian F. Van Dyk, Schuyler D. |
| author_role |
author |
| author2 |
Folatelli, Gaston Maeda, Keiichi Dessart, Luc Jerkstrand, Anders Anderson, Joseph Aoki, Kentaro Bersten, Melina Cecilia Ferrari, Lucía Galbany, Lluís García, Federico Gutiérrez, Claudia P. Hattori, Takashi Kawabata, Koji S. Kravtsov, Timo Lyman, Joseph D. Mattila, Seppo Felipe Olivares, E. Sánchez, Sebastian F. Van Dyk, Schuyler D. |
| author2_role |
author author author author author author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Core-collapse supernovae Solar and Stellar Astrophysics supernovae: general supernovae: individual (SN 2016gkg) stars: massive stars: interiors |
| topic |
Core-collapse supernovae Solar and Stellar Astrophysics supernovae: general supernovae: individual (SN 2016gkg) stars: massive stars: interiors |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Spectral observations of the type-IIb supernova (SN) 2016gkg at 300-800 days are reported. The spectra show nebular characteristics, revealing emission from the progenitor star´s metal-rich core and providing clues to the kinematics and physical conditions of the explosion. The nebular spectra are dominated by emission lines of [O i] λλ6300, 6364 and [Ca ii] λλ7292, 7324. Other notable, albeit weaker, emission lines include Mg I] λ4571, [Fe ii] λ7155, O I λ7774, Ca II triplet, and a broad, boxy feature at the location of Hα. Unlike in other stripped-envelope SNe, the [O i] doublet is clearly resolved due to the presence of strong narrow components. The doublet shows an unprecedented emission line profile consisting of at least three components for each [O i]λ6300, 6364 line: a broad component (width ∼2000 km s-1), and a pair of narrow blue and red components (width ∼300 km s-1) mirrored against the rest velocity. The narrow component appears also in other lines, and is conspicuous in [O i]. This indicates the presence of multiple distinct kinematic components of material at low and high velocities. The low-velocity components are likely to be produced by a dense, slow-moving emitting region near the center, while the broad components are emitted over a larger volume. These observations suggest an asymmetric explosion, supporting the idea of two-component ejecta that influence the resulting late-time spectra and light curves. SN 2016gkg thus presents striking evidence for significant asymmetry in a standard-energy SN explosion. The presence of material at low velocity, which is not predicted in 1D simulations, emphasizes the importance of multidimensional explosion modeling of SNe. Fil: Kuncarayakti, Hanindyo. Tuorla Observatory; Finlandia Fil: Folatelli, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Maeda, Keiichi. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Dessart, Luc. Sorbonne Université; Francia Fil: Jerkstrand, Anders. Stockholm University; Suecia Fil: Anderson, Joseph. European Southern Observatory Chile; Chile Fil: Aoki, Kentaro. National Astronomical Observatory of Japan; Japón Fil: Bersten, Melina Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Ferrari, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Galbany, Lluís. Universidad de Granada; España Fil: García, Federico. University of Groningen; Países Bajos Fil: Gutiérrez, Claudia P.. University of Southampton; Reino Unido Fil: Hattori, Takashi. National Astronomical Observatory of Japan; Japón Fil: Kawabata, Koji S.. Hiroshima University; Japón Fil: Kravtsov, Timo. University of Turku; Finlandia Fil: Lyman, Joseph D.. University of Warwick; Reino Unido Fil: Mattila, Seppo. University of Turku; Finlandia Fil: Felipe Olivares, E.. Universidad de Atacama; Chile Fil: Sánchez, Sebastian F.. Universidad Nacional Autónoma de México; México Fil: Van Dyk, Schuyler D.. Caltech/IPAC; Estados Unidos |
| description |
Spectral observations of the type-IIb supernova (SN) 2016gkg at 300-800 days are reported. The spectra show nebular characteristics, revealing emission from the progenitor star´s metal-rich core and providing clues to the kinematics and physical conditions of the explosion. The nebular spectra are dominated by emission lines of [O i] λλ6300, 6364 and [Ca ii] λλ7292, 7324. Other notable, albeit weaker, emission lines include Mg I] λ4571, [Fe ii] λ7155, O I λ7774, Ca II triplet, and a broad, boxy feature at the location of Hα. Unlike in other stripped-envelope SNe, the [O i] doublet is clearly resolved due to the presence of strong narrow components. The doublet shows an unprecedented emission line profile consisting of at least three components for each [O i]λ6300, 6364 line: a broad component (width ∼2000 km s-1), and a pair of narrow blue and red components (width ∼300 km s-1) mirrored against the rest velocity. The narrow component appears also in other lines, and is conspicuous in [O i]. This indicates the presence of multiple distinct kinematic components of material at low and high velocities. The low-velocity components are likely to be produced by a dense, slow-moving emitting region near the center, while the broad components are emitted over a larger volume. These observations suggest an asymmetric explosion, supporting the idea of two-component ejecta that influence the resulting late-time spectra and light curves. SN 2016gkg thus presents striking evidence for significant asymmetry in a standard-energy SN explosion. The presence of material at low velocity, which is not predicted in 1D simulations, emphasizes the importance of multidimensional explosion modeling of SNe. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020-10 |
| 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 |
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http://hdl.handle.net/11336/147537 Kuncarayakti, Hanindyo; Folatelli, Gaston; Maeda, Keiichi; Dessart, Luc; Jerkstrand, Anders; et al.; Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy; IOP Publishing; Astrophysical Journal; 902; 2; 10-2020; 1-20 0004-637X CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/147537 |
| identifier_str_mv |
Kuncarayakti, Hanindyo; Folatelli, Gaston; Maeda, Keiichi; Dessart, Luc; Jerkstrand, Anders; et al.; Direct Evidence of Two-component Ejecta in Supernova 2016gkg from Nebular Spectroscopy; IOP Publishing; Astrophysical Journal; 902; 2; 10-2020; 1-20 0004-637X CONICET Digital CONICET |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/abb4e7 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf |
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IOP Publishing |
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IOP Publishing |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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