2020MNRAS.493.1761R


Query : 2020MNRAS.493.1761R

2020MNRAS.493.1761R - Mon. Not. R. Astron. Soc., 493, 1761-1781 (2020/April-1)

SN 2016gsd: an unusually luminous and linear Type II supernova with high velocities.

REYNOLDS T.M., FRASER M., MATTILA S., ERGON M., DESSART L., LUNDQVIST P., DONG S., ELIAS-ROSA N., GALBANY L., GUTIERREZ C.P., KANGAS T., KANKARE E., KOTAK R., KUNCARAYAKTI H., PASTORELLO A., RODRIGUEZ O., SMARTT S.J., STRITZINGER M., TOMASELLA L., CHEN P., HARMANEN J., HOSSEINZADEH G., HOWELL D.A., INSERRA C., NICHOLL M., NIELSEN M., SMITH K., SOMERO A., TRONSGAARD R. and YOUNG D.R.

Abstract (from CDS):

We present observations of the unusually luminous Type II supernova (SN) 2016gsd. With a peak absolute magnitude of V = -19.95 ± 0.08, this object is one of the brightest Type II SNe, and lies in the gap of magnitudes between the majority of Type II SNe and the superluminous SNe. Its light curve shows little evidence of the expected drop from the optically thick phase to the radioactively powered tail. The velocities derived from the absorption in H α are also unusually high with the blue edge tracing the fastest moving gas initially at 20 000 km s-1, and then declining approximately linearly to 15 000 km s-1 over ∼100 d. The dwarf host galaxy of the SN indicates a low-metallicity progenitor which may also contribute to the weakness of the metal lines in its spectra. We examine SN 2016gsd with reference to similarly luminous, linear Type II SNe such as SNe 1979C and 1998S, and discuss the interpretation of its observational characteristics. We compare the observations with a model produced by the JEKYLL code and find that a massive star with a depleted and inflated hydrogen envelope struggles to reproduce the high luminosity and extreme linearity of SN 2016gsd. Instead, we suggest that the influence of interaction between the SN ejecta and circumstellar material can explain the majority of the observed properties of the SN. The high velocities and strong H α absorption present throughout the evolution of the SN may imply a circumstellar medium configured in an asymmetric geometry.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: imaging spectroscopy - supernovae:general - supernovae: individual: SN 2016gsd

Status at CDS : Examining the need for a new acronym. // Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 34

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Number of rows : 34
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 iPTF 13iqb SN* 00 34 04.84 -09 42 17.9           SNIIn 60 0
2 CRTS CSS121015 J004244+132827 SN* 00 42 44.380 +13 28 26.20           SNII/IIB 29 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10264 1
4 SN 2007pk SN* 01 31 47.07 +33 36 54.1     17.0     SNIInpec 36 1
5 SN 2013ej SN* 01 36 48.16 +15 45 31.0           SNIIP 160 0
6 SN 2016gsd SN* 02 40 34.440 +19 16 59.90           SNII 6 0
7 PSO J040.1438+19.2823 G 02 40 34.510162 +19 17 00.92112           ~ 1 0
8 ESO 154-10 G 02 45 08.716 -55 44 26.15   13.39   11.79   ~ 34 0
9 SN 2013fc SN* 02 45 08.95 -55 44 27.3           SNIIn 12 0
10 SN 1995G SN* 04 43 44.2 -05 18 53     15.5     SNIIn 72 1
11 ASASSN -15nx SN* 04 43 53.19 -09 42 11.2           SNIIpec 10 0
12 SN 2009kr SN* 05 12 03.30 -15 41 52.2           SNII 73 1
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16074 1
14 OGLE 2014-SN-73 SN* 05 28 51.63 -62 20 16.1           SNII 23 0
15 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4709 2
16 CRTS CSS141118 J092034+504148 SN* 09 20 34.30 +50 41 46.8           SNIIP 80 0
17 SN 2005ip SN* 09 32 06.42 +08 26 44.4 18.1 18.7 18.5     SNII 156 1
18 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 355 1
19 SN 2014G SN* 10 54 34.13 +54 17 56.9           SNIIL 45 1
20 SN 2009hd SN* 11 20 16.99 +12 58 46.3           SNII 52 1
21 SN 1998S SN* 11 46 06.1 +47 28 55     12.2     SNIIn 423 1
22 NGC 3877 GiG 11 46 07.782 +47 29 40.20   11.8       ~ 299 0
23 SN 2008es SN* 11 56 49.13 +54 27 25.7           SNIIL 106 1
24 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1743 2
25 SN 1979C SN* 12 22 58.58 +15 47 52.7   11.6       SNIIL 561 1
26 SN 2009aj SN* 13 56 45.33 -48 29 36.2           ~ 17 1
27 ASASSN -15no SN* 15 38 25.30 +46 54 06.6           SNIc 10 0
28 SN 2000cb SN* 16 01 32.15 +01 42 23.0     18.0     SNII 50 1
29 SN 2013by SN* 16 59 02.43 -60 11 41.8           SNII 50 1
30 ASASSN -15oz SN* 19 19 33.49 -33 46 02.0           SNII 13 0
31 SN 2008fq SN* 20 25 06.19 -24 48 27.6           SNII 36 1
32 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 450 1
33 SN 1980K SN* 20 35 30.07 +60 06 23.7   11.6       SNIIL 447 1
34 SN 2015bs SN* 22 33 43.78 -06 22 08.1           SNII 13 0

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2022.07.05-18:15:48

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