2021MNRAS.505.3950G

Query : 2021MNRAS.505.3950G

2021MNRAS.505.3950G - Mon. Not. R. Astron. Soc., 505, 3950-3967 (2021/August-2)

Understanding the extreme luminosity of DES14X2fna.

GRAYLING M., GUTIERREZ C.P., SULLIVAN M., WISEMAN P., VINCENZI M., GONZALEZ-GAITAN S., TUCKER B.E., GALBANY L., KELSEY L., LIDMAN C., SWANN E., SMITH M., FROHMAIER C., CAROLLO D., GLAZEBROOK K., LEWIS G.F., MOLLER A., HINTON S.R., UDDIN S.A., ABBOTT T.M.C., AGUENA M., AVILA S., BERTIN E., BHARGAVA S., BROOKS D., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., COSTANZI M., DA COSTA L.N., DE VICENTE J., DESAI S., DIEHL H.T., DOEL P., EVERETT S., FERRERO I., FOSALBA P., FRIEMAN J., GARCIA-BELLIDO J., GAZTANAGA E., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HOYLE B., KUEHN K., KUROPATKIN N., LIMA M., MacCRANN N., MARSHALL J.L., MARTINI P., MIQUEL R., MORGAN R., PALMESE A., PAZ-CHINCHON F., PLAZAS A.A., ROMER A.K., SANCHEZ C., SANCHEZ E., SCARPINE V., SERRANO S., SEVILLA-NOARBE I., SOARES-SANTOS M., SUCHYTA E., TARLE G., THOMAS D., TO C., VARGA T.N., WALKER A.R., WILKINSON R.D. (The DES Collaboration)

Abstract (from CDS):

We present DES14X2fna, a high-luminosity, fast-declining Type IIb supernova (SN IIb) at redshift z = 0.0453, detected by the Dark Energy Survey (DES). DES14X2fna is an unusual member of its class, with a light curve showing a broad, luminous peak reaching Mr ≃ -19.3 mag 20 d after explosion. This object does not show a linear decline tail in the light curve until ≃60 d after explosion, after which it declines very rapidly (4.30 ± 0.10 mag 100 d–1 in the r band). By fitting semi-analytic models to the photometry of DES14X2fna, we find that its light curve cannot be explained by a standard 56Ni decay model as this is unable to fit the peak and fast tail decline observed. Inclusion of either interaction with surrounding circumstellar material or a rapidly-rotating neutron star (magnetar) significantly increases the quality of the model fit. We also investigate the possibility for an object similar to DES14X2fna to act as a contaminant in photometric samples of SNe Ia for cosmology, finding that a similar simulated object is misclassified by a recurrent neural network (RNN)-based photometric classifier as an SN Ia in ∼1.1-2.4 per cent of cases in DES, depending on the probability threshold used for a positive classification.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): supernovae: general - supernovae: individual: DES14X2fna

Simbad objects: 37

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Number of rows : 37
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 2004ex SN* 00 38 10.19 +02 43 17.2     17.7     SNIIb 37 1
2 SN 2016gkg SN* 01 34 14.46 -29 26 25.0           SNII 126 0
3 SN 2002ap SN* 01 36 23.85 +15 45 13.2   13.11 14.54     SNIc-BL 587 1
4 SN 2011fu SN* 02 08 21.40 +41 29 12.3           SNII 74 1
5 SN 2018gjx SN* 02 16 15.6 +28 35 29           SNIIb 25 0
6 DES14X2fna SN* 02 23 15.64 -07 05 20.8           SNIIb 6 0
7 SN 2016gsd SN* 02 40 34.440 +19 16 59.90           SNII 13 0
8 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SNIc-BL 1007 1
9 SN 2003bg SN* 04 10 59.43 -31 24 50.4     15.0     SNIc 170 1
10 SN 2009K SN* 04 36 36.77 -00 08 35.6           SNIIb 29 1
11 SN 2004ff SN* 04 58 46.19 -21 34 12.0     18.0     SNIIb 31 1
12 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
13 SN 2009mg SN* 06 21 44.86 -59 44 26.0           SNIIb 25 1
14 SN 2010bh SN* 07 10 30.63 -56 15 19.7           SNIc 336 1
15 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 380 1
16 SN 2016bse SN* 09 20 34.30 +50 41 46.8           SNIIP 134 0
17 SN 2006T SN* 09 54 30.21 -25 42 29.3     17.2     SNIIb 67 1
18 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1507 1
19 SN 2009bb SN* 10 31 33.92 -39 57 28.2           SNIc 185 1
20 SN 1996cb SN* 11 03 41.98 +28 54 13.7   14.22       SNIIb 119 1
21 SN 2014ad SN* 11 57 44.44 -10 10 15.7           SNIcpec 29 1
22 SN 2013df SN* 12 26 29.33 +31 13 38.3           SNIIb 142 1
23 SN 2008ax SN* 12 30 40.80 +41 38 16.1   23.6 23.5 14.1 22.6 SNIIb 295 1
24 SN 2008aq SN* 12 50 30.36 -10 52 01.3     16.3     SNIIb 55 1
25 SN 2011dh SN* 13 30 05.10555 +47 10 10.9227           SNIIb 445 1
26 SN 2013cu SN* 14 33 58.97 +40 14 20.7           SNII: 97 1
27 SN 2012P SN* 14 59 59.04 +01 53 24.4           SNIb/c 51 1
28 SN 2018gk SN* 16 35 53.908 +40 01 58.31           SNII 14 0
29 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2
30 SN 2011ei SN* 20 34 22.62 -31 58 23.6           SNIIb 51 1
31 SN 2016coi SN* 21 59 04.14 +18 11 10.5           SNIc 67 0
32 SN 2006el SN* 22 47 38.50 +39 52 27.6     18.2     SNIIb 34 1
33 SN 2011hs SN* 22 57 11.77 -43 23 04.8           SNIIb 59 1
34 SN 2001ig SN* 22 57 30.69 -41 02 25.9     14.5     SNIIb 190 1
35 SN 2007ru SN* 23 07 23.19 +43 35 34.1     17.5     SNIc-BL 62 1
36 SN 2003jd SN* 23 21 03.38 -04 53 45.5   16.34       SNIc-BL 147 1
37 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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