Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae

S J Prentice; C Inserra; S Schulze; M Nicholl; P A Mazzali; S D Vergani; L Galbany; J P Anderson; C Ashall; T W Chen; M Deckers; M Delgado Manche no; R González Díaz; S González-Gaitán; M Gromadzki; C P Gutiérrez; L Harvey; A Kozyreva; M R Magee; K Maguire; T E Müller-Bravo; S Mu noz Torres; P J Pessi; J Sollerman; J Teffs; J H Terwel; D R Young

doi:10.1093/mnras/stab2864

Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae

S J Prentice, C Inserra, S Schulze, M Nicholl, P A Mazzali, S D Vergani, L Galbany, J P Anderson, C Ashall, T W Chen, M Deckers, M Delgado Manche no, R González Díaz, S González-Gaitán, M Gromadzki, C P Gutiérrez, L Harvey, A Kozyreva, M R Magee, K MaguireT E Müller-Bravo, S Mu noz Torres, P J Pessi, J Sollerman, J Teffs, J H Terwel, D R Young

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Abstract

The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of Mr < −19.8 mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.

Original language	English
Pages (from-to)	4342–4358
Journal	Monthly Notices of the Royal Astronomical Society
Volume	508
Issue number	3
Early online date	05 Oct 2021
DOIs	https://doi.org/10.1093/mnras/stab2864
Publication status	Published - Dec 2021

Keywords

Space and Planetary Science
Astronomy and Astrophysics

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Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae
Copyright 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Final published version, 7.44 MBLicence: Unspecified

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Prentice, S. J., Inserra, C., Schulze, S., Nicholl, M., Mazzali, P. A., Vergani, S. D., Galbany, L., Anderson, J. P., Ashall, C., Chen, T. W., Deckers, M., Manche no, M. D., Díaz, R. G., González-Gaitán, S., Gromadzki, M., Gutiérrez, C. P., Harvey, L., Kozyreva, A., Magee, M. R., ... Young, D. R. (2021). Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae. Monthly Notices of the Royal Astronomical Society, 508(3), 4342–4358. https://doi.org/10.1093/mnras/stab2864

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title = "Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae",

abstract = "The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of Mr < −19.8 mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.",

keywords = "Space and Planetary Science, Astronomy and Astrophysics",

author = "Prentice, {S J} and C Inserra and S Schulze and M Nicholl and Mazzali, {P A} and Vergani, {S D} and L Galbany and Anderson, {J P} and C Ashall and Chen, {T W} and M Deckers and {Manche no}, {M Delgado} and D{\'i}az, {R Gonz{\'a}lez} and S Gonz{\'a}lez-Gait{\'a}n and M Gromadzki and Guti{\'e}rrez, {C P} and L Harvey and A Kozyreva and Magee, {M R} and K Maguire and M{\"u}ller-Bravo, {T E} and Torres, {S Mu noz} and Pessi, {P J} and J Sollerman and J Teffs and Terwel, {J H} and Young, {D R}",

year = "2021",

month = dec,

doi = "10.1093/mnras/stab2864",

language = "English",

volume = "508",

pages = "4342–4358",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Prentice, SJ, Inserra, C, Schulze, S, Nicholl, M, Mazzali, PA, Vergani, SD, Galbany, L, Anderson, JP, Ashall, C, Chen, TW, Deckers, M, Manche no, MD, Díaz, RG, González-Gaitán, S, Gromadzki, M, Gutiérrez, CP, Harvey, L, Kozyreva, A, Magee, MR, Maguire, K, Müller-Bravo, TE, Torres, SMN, Pessi, PJ, Sollerman, J, Teffs, J, Terwel, JH & Young, DR 2021, 'Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae', Monthly Notices of the Royal Astronomical Society, vol. 508, no. 3, pp. 4342–4358. https://doi.org/10.1093/mnras/stab2864

TY - JOUR

T1 - Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae

AU - Prentice, S J

AU - Inserra, C

AU - Schulze, S

AU - Nicholl, M

AU - Mazzali, P A

AU - Vergani, S D

AU - Galbany, L

AU - Anderson, J P

AU - Ashall, C

AU - Chen, T W

AU - Deckers, M

AU - Manche no, M Delgado

AU - Díaz, R González

AU - González-Gaitán, S

AU - Gromadzki, M

AU - Gutiérrez, C P

AU - Harvey, L

AU - Kozyreva, A

AU - Magee, M R

AU - Maguire, K

AU - Müller-Bravo, T E

AU - Torres, S Mu noz

AU - Pessi, P J

AU - Sollerman, J

AU - Teffs, J

AU - Terwel, J H

AU - Young, D R

PY - 2021/12

Y1 - 2021/12

N2 - The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of Mr < −19.8 mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.

AB - The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of Mr < −19.8 mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.

KW - Space and Planetary Science

KW - Astronomy and Astrophysics

U2 - 10.1093/mnras/stab2864

DO - 10.1093/mnras/stab2864

M3 - Article

SN - 0035-8711

VL - 508

SP - 4342

EP - 4358

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae

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