2016MNRAS.461.3057S


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.16CEST20:55:53

2016MNRAS.461.3057S - Mon. Not. R. Astron. Soc., 461, 3057-3074 (2016/September-3)

SN 2015U: a rapidly evolving and luminous Type Ibn supernova.

SHIVVERS I., ZHENG W., MAUERHAN J., KLEISER I.K.W., VAN DYK S.D., SILVERMAN J.M., GRAHAM M.L., KELLY P.L., FILIPPENKO A.V. and KUMAR S.

Abstract (from CDS):

Supernova (SN) 2015U (also known as PSN J07285387+3349106) was discovered in NGC 2388 on 2015 Feb. 11. A rapidly evolving and luminous event, it showed effectively hydrogen-free spectra dominated by relatively narrow helium P-Cygni spectral features and it was classified as an SN Ibn. In this paper, we present photometric, spectroscopic, and spectropolarimetric observations of SN 2015U, including a Keck/DEIMOS spectrum (resolution ≃5000) which fully resolves the optical emission and absorption features. We find that SN 2015U is best understood via models of shock breakout from extended and dense circumstellar material (CSM), likely created by a history of mass-loss from the progenitor with an extreme outburst within ∼1-2 yr of core collapse (but we do not detect any outburst in our archival imaging of NGC 2388). We argue that the high luminosity of SN 2015U was powered not through 56Ni decay but via the deposition of kinetic energy into the ejecta/CSM shock interface. Though our analysis is hampered by strong host-galaxy dust obscuration (which likely exhibits multiple components), our data set makes SN 2015U one of the best-studied Type Ibn SNe and provides a bridge of understanding to other rapidly fading transients, both luminous and relatively faint.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: mass-loss - supernovae: individual: SN 2015U - supernovae: individual: SN 2015U

Simbad objects: 35

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Number of rows : 35

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 236928 * 02 02 42.0926399205 +60 15 26.434612498   10.00 9.07     A4Ib 76 0
2 HD 14069 * 02 16 45.1906517044 +07 41 10.686704586   9.21 9.06     A0 41 0
3 SNLS 06D1hc SN* 02 24 48.25 -04 56 03.6           ~ 9 0
4 SN 2005ek SN* 03 05 48.96 +36 46 10.6     17.5     SNIc: 54 1
5 V* CC Cas EB* 03 14 05.3362562931 +59 33 48.488947721 7.07 7.56 7.08     O8.5III(n)((f)) 271 0
6 HD 25443 * 04 06 08.0670623506 +62 06 06.620149609 6.45 6.998 6.766     B0.5III 121 0
7 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 63 1
8 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 71 1
9 HD 245310 Be* 05 36 23.0152289698 +21 11 11.453770335 8.48 9.17 8.96     B2:III:nnpe 46 0
10 SN 2008fp SN* 07 16 32.60 -29 19 31.7           SNIa 56 1
11 HD 58221 * 07 26 07.0996312527 +33 26 05.754911627   8.80 8.71     B9 3 0
12 HD 58726 * 07 28 17.9855942531 +33 56 35.817423444   9.32 9.21     A0 3 0
13 NGC 2388 GiG 07 28 53.4530354679 +33 49 08.550019911   14.7       ~ 121 2
14 SN 2015U SN* 07 28 53.87 +33 49 10.6           SNIbn 24 1
15 HD 59291 * 07 30 43.1015312919 +33 42 38.982073472   9.43 9.30     A2 4 0
16 SN 2009kn SN* 08 09 43.04 -17 44 51.3           SNIIn 41 1
17 SN 2010al SN* 08 14 15.91 +18 26 18.2           SNIInpec 47 1
18 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 282 1
19 SN 2010jl SN* 09 42 53.33 +09 29 41.8           SNIIn 218 1
20 SN 2014J SN* 09 55 42.12 +69 40 25.9           SNIa 329 1
21 PSN J10081059+5150570 s*b 10 08 10.58 +51 50 57.1           LBV 87 0
22 SN 1998S SN* 11 46 06.13 +47 28 55.4     12.2     SNIIn 395 1
23 SN 1994W SN* 12 02 10.92 +62 08 32.7     13.3     SNIInP 173 1
24 BD+05 2618 * 12 21 14.2307223438 +04 36 50.545563872   11.03 10.37 10.4   G0 6 0
25 SN 2006X SN* 12 22 53.93 +15 48 32.0     15.3     SNIa 289 1
26 PS1-12bv ev 12 25 34.602 +46 41 26.97           ~ 11 0
27 SN 2005la SN* 12 52 15.68 +27 31 52.5     17.6     SNIbn/IIbn 53 1
28 SN 1986G SN* 13 25 36.46 -43 01 53.6   12.45 11.44     SNIapec 387 1
29 iPTF 13beo SN* 16 12 26.63 +14 19 18.0           SNIbn 21 0
30 HD 331891 * 20 12 02.1493609779 +32 47 43.690280981   9.53 9.31     A0 52 0
31 Schulte 12 s*b 20 32 40.9574572449 +41 14 29.276333992 16.1 14.45 11.702     B3-4Ia+ 374 0
32 LSQ 13ccw SN* 21 35 51.64 -18 32 52.0           SNIbn 17 0
33 SNLS 04D4ec SN* 22 16 29.286 -18 11 04.13           ~ 10 1
34 SN 2011hw SN* 22 26 14.54 +34 12 59.1           SNIIn: 42 1
35 SN 2014C SN* 22 37 05.60 +34 24 31.9           SNIb 70 1

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2021.05.16-20:55:53

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