A long life of excess: The interacting transient SN 2017hcc

S. Moran; M. Fraser; R. Kotak; A. Pastorello; S. Benetti; S. J. Brennan; C. P. Gutiérrez; E. Kankare; H. Kuncarayakti; S. Mattila; T. M. Reynolds; J. P. Anderson; P. J. Brown; S. Campana; K. C. Chambers; T-W Chen; M. Della valle; M. Dennefeld; N. Elias-rosa; L. Galbany; F. J. Galindo-Guil; M. Gromadzki; D. Hiramatsu; C. Inserra; G. Leloudas; M. Nicholl; A. Reguitti; M. Shahbandeh; S. J. Smartt; L. Tartaglia; D. R. Young

doi:10.1051/0004-6361/202244565

A long life of excess: The interacting transient SN 2017hcc

S. Moran
, M. Fraser
, R. Kotak
, A. Pastorello
, S. Benetti
, S. J. Brennan
, C. P. Gutiérrez
, E. Kankare
, H. Kuncarayakti
, S. Mattila
, T. M. Reynolds
, J. P. Anderson
, P. J. Brown
, S. Campana
, K. C. Chambers
, T-W Chen
, M. Della valle
, M. Dennefeld
, N. Elias-rosa
, L. Galbany

F. J. Galindo-Guil, M. Gromadzki, D. Hiramatsu, C. Inserra, G. Leloudas, M. Nicholl, A. Reguitti, M. Shahbandeh, S. J. Smartt, L. Tartaglia, D. R. Young

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Abstract

In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 days. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs >∼+800 days.

Original language	English
Article number	A51
Journal	Astronomy and Astrophysics
Volume	669
Number of pages	22
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/202244565
Publication status	Published - 2023

Keywords

Supernovae: general
Supernovae: individual: SN 2017hcc
Supernovae: individual: ATLAS17lsn
Supernovae: individual: PS17fra

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Moran, S., Fraser, M., Kotak, R., Pastorello, A., Benetti, S., Brennan, S. J., Gutiérrez, C. P., Kankare, E., Kuncarayakti, H., Mattila, S., Reynolds, T. M., Anderson, J. P., Brown, P. J., Campana, S., Chambers, K. C., Chen, T.-W., Della valle, M., Dennefeld, M., Elias-rosa, N., ... Young, D. R. (2023). A long life of excess: The interacting transient SN 2017hcc. Astronomy and Astrophysics, 669, Article A51. https://doi.org/10.1051/0004-6361/202244565

@article{a6647fade22a47d49cb8fa4a9aa70fb8,

title = "A long life of excess: The interacting transient SN 2017hcc",

abstract = "In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 days. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs >∼+800 days. ",

keywords = "Supernovae: general, Supernovae: individual: SN 2017hcc, Supernovae: individual: ATLAS17lsn, Supernovae: individual: PS17fra",

author = "S. Moran and M. Fraser and R. Kotak and A. Pastorello and S. Benetti and Brennan, \{S. J.\} and Guti{\'e}rrez, \{C. P.\} and E. Kankare and H. Kuncarayakti and S. Mattila and Reynolds, \{T. M.\} and Anderson, \{J. P.\} and Brown, \{P. J.\} and S. Campana and Chambers, \{K. C.\} and T-W Chen and \{Della valle\}, M. and M. Dennefeld and N. Elias-rosa and L. Galbany and Galindo-Guil, \{F. J.\} and M. Gromadzki and D. Hiramatsu and C. Inserra and G. Leloudas and M. Nicholl and A. Reguitti and M. Shahbandeh and Smartt, \{S. J.\} and L. Tartaglia and Young, \{D. R.\}",

year = "2023",

doi = "10.1051/0004-6361/202244565",

language = "English",

volume = "669",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Moran, S, Fraser, M, Kotak, R, Pastorello, A, Benetti, S, Brennan, SJ, Gutiérrez, CP, Kankare, E, Kuncarayakti, H, Mattila, S, Reynolds, TM, Anderson, JP, Brown, PJ, Campana, S, Chambers, KC, Chen, T-W, Della valle, M, Dennefeld, M, Elias-rosa, N, Galbany, L, Galindo-Guil, FJ, Gromadzki, M, Hiramatsu, D, Inserra, C, Leloudas, G, Nicholl, M, Reguitti, A, Shahbandeh, M, Smartt, SJ, Tartaglia, L & Young, DR 2023, 'A long life of excess: The interacting transient SN 2017hcc', Astronomy and Astrophysics, vol. 669, A51. https://doi.org/10.1051/0004-6361/202244565

TY - JOUR

T1 - A long life of excess: The interacting transient SN 2017hcc

AU - Moran, S.

AU - Fraser, M.

AU - Kotak, R.

AU - Pastorello, A.

AU - Benetti, S.

AU - Brennan, S. J.

AU - Gutiérrez, C. P.

AU - Kankare, E.

AU - Kuncarayakti, H.

AU - Mattila, S.

AU - Reynolds, T. M.

AU - Anderson, J. P.

AU - Brown, P. J.

AU - Campana, S.

AU - Chambers, K. C.

AU - Chen, T-W

AU - Della valle, M.

AU - Dennefeld, M.

AU - Elias-rosa, N.

AU - Galbany, L.

AU - Galindo-Guil, F. J.

AU - Gromadzki, M.

AU - Hiramatsu, D.

AU - Inserra, C.

AU - Leloudas, G.

AU - Nicholl, M.

AU - Reguitti, A.

AU - Shahbandeh, M.

AU - Smartt, S. J.

AU - Tartaglia, L.

AU - Young, D. R.

PY - 2023

Y1 - 2023

N2 - In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 days. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs >∼+800 days.

AB - In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 days. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs >∼+800 days.

KW - Supernovae: general

KW - Supernovae: individual: SN 2017hcc

KW - Supernovae: individual: ATLAS17lsn

KW - Supernovae: individual: PS17fra

U2 - 10.1051/0004-6361/202244565

DO - 10.1051/0004-6361/202244565

M3 - Journal article

SN - 0004-6361

VL - 669

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A51

ER -

A long life of excess: The interacting transient SN 2017hcc

Abstract

Keywords

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