2023A&A...669A..51M

Query : 2023A&A...669A..51M

2023A&A...669A..51M - Astronomy and Astrophysics, volume 669A51 (2023/1-1)

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., MULLER-BRAVO T.E., NICHOLL M., REGUITTI A., SHAHBANDEH M., SMARTT S.J., TARTAGLIA L. and YOUNG D.R.

Abstract (from CDS):

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 ≳+800 d.

Abstract Copyright: © The Authors 2023

Journal keyword(s): supernovae: general - supernovae: individual: SN 2017hcc - supernovae: individual: ATLAS17lsn - supernovae: individual: PS17fra

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2017hcc SN* 00 03 50.580 -11 28 28.78           SNIIP 43 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 380 1
4 SN 2005ip SN* 09 32 06.42 +08 26 44.4 18.1 18.7 18.5     SNIIn 230 1
5 SN 2010jl SN* 09 42 53.33 +09 29 41.8           SNIIn 350 1
6 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1507 1
7 HSC 16aayt SN* 10 02 05.57 +02 57 58.3           SNIIn 5 0
8 SN 1998S SN* 11 46 06.1 +47 28 55     12.2     SNIIn 517 1
9 SN 2015da SN* 13 52 24.16470 +39 41 27.9355           SNIIn 41 0
10 SN 1995N SN* 14 49 28.29 -10 10 14.0     17.5     SNIIn 172 1
11 PTF 12glz SN* 15 54 53.04 +03 32 07.5           SNIIn 13 0

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