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dc.contributor.author
Shahbandeh, M.
dc.contributor.author
Hsiao, E. Y.
dc.contributor.author
Ashall, C.
dc.contributor.author
Teffs, J.
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Hoeflich, P.
dc.contributor.author
Morrell, N.
dc.contributor.author
Phillips, M. M.
dc.contributor.author
Anderson, J. P.
dc.contributor.author
Baron, E.
dc.contributor.author
Burns, C. R.
dc.contributor.author
Contreras, C.
dc.contributor.author
Davis, S.
dc.contributor.author
Diamond, T. R.
dc.contributor.author
Folatelli, Gaston
dc.contributor.author
Galbany, L.
dc.contributor.author
Gall, C.
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Hachinger, S.
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Holmbo, S.
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Karamehmetoglu, E.
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Kasliwal, M. M.
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Kirshner, R. P.
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Krisciunas, K.
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Kumar, S.
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Lu, J.
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Marion, G. H.
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Mazzali, P. A.
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Piro, A. L.
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Sand, D. J.
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Stritzinger, M. D.
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Suntzeff, N. B.
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Taddia, F.
dc.contributor.author
Uddin, S. A.
dc.date.available
2023-09-08T12:07:12Z
dc.date.issued
2022-02
dc.identifier.citation
Shahbandeh, M.; Hsiao, E. Y.; Ashall, C.; Teffs, J.; Hoeflich, P.; et al.; Carnegie Supernova Project-II: Near-infrared Spectroscopy of Stripped-envelope Core-collapse Supernovae; IOP Publishing; Astrophysical Journal; 925; 2; 2-2022; 1-24
dc.identifier.issn
0004-637X
dc.identifier.uri
http://hdl.handle.net/11336/210879
dc.description.abstract
We present 75 near-infrared (NIR; 0.8-2.5 μm) spectra of 34 stripped-envelope core-collapse supernovae (SESNe) obtained by the Carnegie Supernova Project-II (CSP-II), encompassing optical spectroscopic Types IIb, Ib, Ic, and Ic-BL. The spectra range in phase from pre-maximum to 80 days past maximum. This unique data set constitutes the largest NIR spectroscopic sample of SESNe to date. NIR spectroscopy provides observables with additional information that is not available in the optical. Specifically, the NIR contains the strong lines of He i and allows a more detailed look at whether Type Ic supernovae are completely stripped of their outer He layer. The NIR spectra of SESNe have broad similarities, but closer examination through statistical means reveals a strong dichotomy between NIR "He-rich"and "He-poor"SNe. These NIR subgroups correspond almost perfectly to the optical IIb/Ib and Ic/Ic-BL types, respectively. The largest difference between the two groups is observed in the 2 μm region, near the He i λ2.0581 μm line. The division between the two groups is not an arbitrary one along a continuous sequence. Early spectra of He-rich SESNe show much stronger He i λ2.0581 μm absorption compared to the He-poor group, but with a wide range of profile shapes. The same line also provides evidence for trace amounts of He in half of our SNe in the He-poor group.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
SUPERNOVAE
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Carnegie Supernova Project-II: Near-infrared Spectroscopy of Stripped-envelope Core-collapse Supernovae
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-09-05T18:02:35Z
dc.journal.volume
925
dc.journal.number
2
dc.journal.pagination
1-24
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Shahbandeh, M.. Florida State University; Estados Unidos
dc.description.fil
Fil: Hsiao, E. Y.. Florida State University; Estados Unidos
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Fil: Ashall, C.. University Hawaii Institute For Astronomy; Estados Unidos
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Fil: Teffs, J.. Liverpool John Moores University; Reino Unido
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Fil: Hoeflich, P.. Florida State University; Estados Unidos
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Fil: Morrell, N.. Las Campanas Observatory; Chile
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Fil: Phillips, M. M.. Las Campanas Observatory; Chile
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Fil: Anderson, J. P.. European Southern Observatory Santiago; Chile
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Fil: Baron, E.. No especifíca;
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Fil: Burns, C. R.. No especifíca;
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Fil: Contreras, C.. Las Campanas Observatory; Chile
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Fil: Davis, S.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Diamond, T. R.. Private Astronomer; Estados Unidos
dc.description.fil
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
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Fil: Galbany, L.. Consejo Superior de Investigaciones Científicas; España
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Fil: Gall, C.. No especifíca;
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Fil: Hachinger, S.. No especifíca;
dc.description.fil
Fil: Holmbo, S.. University Aarhus; Dinamarca
dc.description.fil
Fil: Karamehmetoglu, E.. University Aarhus; Dinamarca
dc.description.fil
Fil: Kasliwal, M. M.. California Institute of Technology; Estados Unidos
dc.description.fil
Fil: Kirshner, R. P.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Krisciunas, K.. Texas A&M University; Estados Unidos
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Fil: Kumar, S.. Florida State University; Estados Unidos
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Fil: Lu, J.. Florida State University; Estados Unidos
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Fil: Marion, G. H.. University of Texas at Austin; Estados Unidos
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Fil: Mazzali, P. A.. Gobierno de la República Federal de Alemania. Max Planck Institut für Astrophysik; Alemania
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Fil: Piro, A. L.. No especifíca;
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Fil: Sand, D. J.. University of Arizona; Estados Unidos
dc.description.fil
Fil: Stritzinger, M. D.. University Aarhus; Dinamarca
dc.description.fil
Fil: Suntzeff, N. B.. Texas A&M University; Estados Unidos
dc.description.fil
Fil: Taddia, F.. University Aarhus; Dinamarca
dc.description.fil
Fil: Uddin, S. A.. Texas A&M University; Estados Unidos
dc.journal.title
Astrophysical Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3847/1538-4357/ac4030
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