A long life of excess: The interacting transient SN 2017hcc
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A long life of excess : The interacting transient SN 2017hcc. / Moran, S.; Fraser, M.; Kotak, R.; Pastorello, A.; Benetti, S.; Brennan, S. J.; Gutierrez, 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.; Galbany, L.; Galindo-Guil, F. J.; Gromadzki, M.; Hiramatsu, D.; Inserra, C.; Leloudas, G.; Mueller-Bravo, T. E.; Nicholl, M.; Reguitti, A.; Shahbandeh, M.; Smartt, S. J.; Tartaglia, L.; Young, D. R.
In: Astronomy & Astrophysics, Vol. 669, A51, 05.01.2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A long life of excess
T2 - 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 - Gutierrez, 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 - Mueller-Bravo, T. E.
AU - Nicholl, M.
AU - Reguitti, A.
AU - Shahbandeh, M.
AU - Smartt, S. J.
AU - Tartaglia, L.
AU - Young, D. R.
PY - 2023/1/5
Y1 - 2023/1/5
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 d. 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 greater than or similar to+800 d.
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 d. 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 greater than or similar to+800 d.
KW - supernovae: general
KW - supernovae: individual: SN 2017hcc
KW - supernovae: individual: ATLAS17lsn
KW - supernovae: individual: PS17fra
KW - IIN SUPERNOVA
KW - X-RAY
KW - LIGHT CURVES
KW - SUPERLUMINOUS SUPERNOVAE
KW - INFRARED-SPECTROSCOPY
KW - OPTICAL OBSERVATIONS
KW - ANALYTIC SOLUTIONS
KW - DUST FORMATION
KW - 2010JL
KW - CALIBRATION
U2 - 10.1051/0004-6361/202244565
DO - 10.1051/0004-6361/202244565
M3 - Journal article
VL - 669
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A51
ER -
ID: 338298085