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SN 2017dio: A Type-Ic supernova exploding in a hydrogen-rich circumstellar medium

SN 2017dio: A Type-Ic supernova exploding in a hydrogen-rich circumstellar medium
SN 2017dio: A Type-Ic supernova exploding in a hydrogen-rich circumstellar medium

SN 2017dio shows both spectral characteristics of a type-Ic supernova (SN) and signs of a hydrogen-rich circumstellar medium (CSM). Prominent, narrow emission lines of H and He are superposed on the continuum. Subsequent evolution revealed that the SN ejecta are interacting with the CSM. The initial SN Ic identification was confirmed by removing the CSM interaction component from the spectrum and comparing with known SNe Ic and, reversely, adding a CSM interaction component to the spectra of known SNe Ic and comparing them to SN 2017dio. Excellent agreement was obtained with both procedures, reinforcing the SN Ic classification. The light curve constrains the pre-interaction SN Ic peak absolute magnitude to be around Mg = -17.6 mag. No evidence of significant extinction is found, ruling out a brighter luminosity required by an SN Ia classification. These pieces of evidence support the view that SN 2017dio is an SN Ic, and therefore the first firm case of an SN Ic with signatures of hydrogen-rich CSM in the early spectrum. The CSM is unlikely to have been shaped by steady-state stellar winds. The mass loss of the progenitor star must have been intense, M ∼ 0.02 ϵ Hα/0.01)-1(vwind/500 km s-1) (vshock 10,000 kms-1)-3Me yr-1, peaking at a few decades before the SN. Such a high mass-loss rate might have been experienced by the progenitor through eruptions or binary stripping.

supernovae: general, supernovae: individual (SN 2017dio)
2041-8205
Kuncarayakti, Hanindyo
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Maeda, Keiichi
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Ashall, Christopher J.
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Prentice, Simon J.
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Mattila, Seppo
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Kankare, Erkki
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Fransson, Claes
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Lundqvist, Peter
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Pastorello, Andrea
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Leloudas, Giorgos
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Anderson, Joseph P.
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Benetti, Stefano
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Bersten, Melina C.
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Cappellaro, Enrico
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Cartier, Régis
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Denneau, Larry
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Della Valle, Massimo
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Elias-Rosa, Nancy
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Folatelli, Gastón
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Fraser, Morgan
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Galbany, Lluís
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Gall, Christa
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Gal-Yam, Avishay
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Gutiérrez, Claudia P.
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Hamanowicz, Aleksandra
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Heinze, Ari
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Inserra, Cosimo
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Kangas, Tuomas
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Mazzali, Paolo
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Melandri, Andrea
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Pignata, Giuliano
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Rest, Armin
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Reynolds, Thomas
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Roy, Rupak
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Smartt, Stephen J.
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Smith, Ken W.
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Sollerman, Jesper
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Somero, Auni
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Stalder, Brian
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Stritzinger, Maximilian
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Taddia, Francesco
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Tomasella, Lina
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Tonry, John
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Weiland, Henry
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Young, David R.
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Kuncarayakti, Hanindyo
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Maeda, Keiichi
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Ashall, Christopher J.
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Prentice, Simon J.
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Mattila, Seppo
b668cb4a-741b-4812-a71b-cca11a4fd9a1
Kankare, Erkki
fa96b7b0-e3af-4910-89f3-fc9b20105c7c
Fransson, Claes
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Lundqvist, Peter
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Pastorello, Andrea
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Leloudas, Giorgos
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Anderson, Joseph P.
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Benetti, Stefano
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Bersten, Melina C.
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Cappellaro, Enrico
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Cartier, Régis
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Denneau, Larry
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Della Valle, Massimo
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Elias-Rosa, Nancy
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Folatelli, Gastón
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Fraser, Morgan
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Galbany, Lluís
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Gall, Christa
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Gal-Yam, Avishay
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Gutiérrez, Claudia P.
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Hamanowicz, Aleksandra
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Heinze, Ari
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Inserra, Cosimo
004da73f-5b5e-43f4-b1a7-aaa0e579672e
Kangas, Tuomas
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Mazzali, Paolo
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Melandri, Andrea
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Pignata, Giuliano
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Rest, Armin
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Reynolds, Thomas
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Roy, Rupak
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Smartt, Stephen J.
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Smith, Ken W.
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Sollerman, Jesper
f4d66eed-cee5-433a-9533-8f12816f2eaf
Somero, Auni
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Stalder, Brian
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Stritzinger, Maximilian
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Taddia, Francesco
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Tomasella, Lina
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Tonry, John
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Weiland, Henry
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Young, David R.
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Kuncarayakti, Hanindyo, Maeda, Keiichi, Ashall, Christopher J., Prentice, Simon J., Mattila, Seppo, Kankare, Erkki, Fransson, Claes, Lundqvist, Peter, Pastorello, Andrea, Leloudas, Giorgos, Anderson, Joseph P., Benetti, Stefano, Bersten, Melina C., Cappellaro, Enrico, Cartier, Régis, Denneau, Larry, Della Valle, Massimo, Elias-Rosa, Nancy, Folatelli, Gastón, Fraser, Morgan, Galbany, Lluís, Gall, Christa, Gal-Yam, Avishay, Gutiérrez, Claudia P., Hamanowicz, Aleksandra, Heinze, Ari, Inserra, Cosimo, Kangas, Tuomas, Mazzali, Paolo, Melandri, Andrea, Pignata, Giuliano, Rest, Armin, Reynolds, Thomas, Roy, Rupak, Smartt, Stephen J., Smith, Ken W., Sollerman, Jesper, Somero, Auni, Stalder, Brian, Stritzinger, Maximilian, Taddia, Francesco, Tomasella, Lina, Tonry, John, Weiland, Henry and Young, David R. (2018) SN 2017dio: A Type-Ic supernova exploding in a hydrogen-rich circumstellar medium. The Astrophysical Journal Letters, 854 (1), [L14]. (doi:10.3847/2041-8213/aaaa1a).

Record type: Article

Abstract

SN 2017dio shows both spectral characteristics of a type-Ic supernova (SN) and signs of a hydrogen-rich circumstellar medium (CSM). Prominent, narrow emission lines of H and He are superposed on the continuum. Subsequent evolution revealed that the SN ejecta are interacting with the CSM. The initial SN Ic identification was confirmed by removing the CSM interaction component from the spectrum and comparing with known SNe Ic and, reversely, adding a CSM interaction component to the spectra of known SNe Ic and comparing them to SN 2017dio. Excellent agreement was obtained with both procedures, reinforcing the SN Ic classification. The light curve constrains the pre-interaction SN Ic peak absolute magnitude to be around Mg = -17.6 mag. No evidence of significant extinction is found, ruling out a brighter luminosity required by an SN Ia classification. These pieces of evidence support the view that SN 2017dio is an SN Ic, and therefore the first firm case of an SN Ic with signatures of hydrogen-rich CSM in the early spectrum. The CSM is unlikely to have been shaped by steady-state stellar winds. The mass loss of the progenitor star must have been intense, M ∼ 0.02 ϵ Hα/0.01)-1(vwind/500 km s-1) (vshock 10,000 kms-1)-3Me yr-1, peaking at a few decades before the SN. Such a high mass-loss rate might have been experienced by the progenitor through eruptions or binary stripping.

Full text not available from this repository.

More information

Accepted/In Press date: 22 January 2018
e-pub ahead of print date: 9 February 2018
Published date: 10 February 2018
Keywords: supernovae: general, supernovae: individual (SN 2017dio)

Identifiers

Local EPrints ID: 420703
URI: http://eprints.soton.ac.uk/id/eprint/420703
ISSN: 2041-8205
PURE UUID: 20ec8038-af3d-4ba6-bebc-41b3487f9be6
ORCID for Cosimo Inserra: ORCID iD orcid.org/0000-0002-3968-4409

Catalogue record

Date deposited: 11 May 2018 16:30
Last modified: 20 Nov 2019 17:31

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Contributors

Author: Hanindyo Kuncarayakti
Author: Keiichi Maeda
Author: Christopher J. Ashall
Author: Simon J. Prentice
Author: Seppo Mattila
Author: Erkki Kankare
Author: Claes Fransson
Author: Peter Lundqvist
Author: Andrea Pastorello
Author: Giorgos Leloudas
Author: Joseph P. Anderson
Author: Stefano Benetti
Author: Melina C. Bersten
Author: Enrico Cappellaro
Author: Régis Cartier
Author: Larry Denneau
Author: Massimo Della Valle
Author: Nancy Elias-Rosa
Author: Gastón Folatelli
Author: Morgan Fraser
Author: Lluís Galbany
Author: Christa Gall
Author: Avishay Gal-Yam
Author: Claudia P. Gutiérrez
Author: Aleksandra Hamanowicz
Author: Ari Heinze
Author: Cosimo Inserra ORCID iD
Author: Tuomas Kangas
Author: Paolo Mazzali
Author: Andrea Melandri
Author: Giuliano Pignata
Author: Armin Rest
Author: Thomas Reynolds
Author: Rupak Roy
Author: Stephen J. Smartt
Author: Ken W. Smith
Author: Jesper Sollerman
Author: Auni Somero
Author: Brian Stalder
Author: Maximilian Stritzinger
Author: Francesco Taddia
Author: Lina Tomasella
Author: John Tonry
Author: Henry Weiland
Author: David R. Young

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