2017MNRAS.471.4381S


Query : 2017MNRAS.471.4381S

2017MNRAS.471.4381S - Mon. Not. R. Astron. Soc., 471, 4381-4397 (2017/November-2)

The nearby Type Ibn supernova 2015G: signatures of asymmetry and progenitor constraints.

SHIVVERS I., ZHENG W., VAN DYK S.D., MAUERHAN J., FILIPPENKO A.V., SMITH N., FOLEY R.J., MAZZALI P., KAMBLE A., KILPATRICK C.D., MARGUTTI R., YUK H., GRAHAM M.L., KELLY P.L., ANDREWS J., MATHESON T., WOOD-VASEY W.M., PONDER K.A., BROWN P.J., CHEVALIER R., MILISAVLJEVIC D., DROUT M., PARRENT J., SODERBERG A., ASHALL C., PIASCIK A. and PRENTICE S.

Abstract (from CDS):

We present the results of an extensive observational campaign on the nearby Type Ibn SN 2015G, including data from radio through ultraviolet wavelengths. SN 2015G was asymmetric, showing late-time nebular lines redshifted by ∼1000 km s–1. It shared many features with the prototypical SN Ibn 2006jc, including extremely strong He I emission lines and a late-time blue pseudo-continuum. The young SN 2015G showed narrow P-Cygni profiles of He I, but never in its evolution did it show any signature of hydrogen - arguing for a dense, ionized and hydrogen-free circumstellar medium moving outward with a velocity of ∼1000 km s–1 and created by relatively recent mass-loss from the progenitor star. Ultraviolet through infrared observations show that the fading SN 2015G (which was probably discovered some 20 d post-peak) had a spectral energy distribution that was well described by a simple, single-component blackbody. Archival HST images provide upper limits on the luminosity of SN 2015G's progenitor, while non-detections of any luminous radio afterglow and optical non-detections of outbursts over the past two decades provide constraints upon its mass-loss history.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4907 2
2 SN 2015U SN* 07 28 53.87 +33 49 10.6           SNIbn 35 1
3 SN 2010al SN* 08 14 15.91 +18 26 18.2           SNIInpec 64 1
4 NAME Pup A SNR 08 24 07 -42 59.8           ~ 593 1
5 SN 2014av SN* 09 00 20.02 +52 29 28.0           SNIb: 20 1
6 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SNIbn 341 1
7 * eta Car Em* 10 45 03.5377808928 -59 41 04.051599720 6.37 7.03 6.48 4.90 4.41 LBV 2422 0
8 SN 2007C SN* 13 08 49.30 -06 47 01.0 18.1 17.1 15.9     SNIb 56 1
9 PTF 11qcj SN* 13 13 41.51 +47 17 57.0           SNIb 51 0
10 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4314 2
11 ASASSN -15ed SN* 16 48 25.16 +50 59 30.7           SNIbn 23 0
12 SN 2004ao SN* 17 28 09.35 +07 24 55.5     14.9     SNIb 42 1
13 SN 1999cq SN* 18 32 07.10 +37 36 44.3     15.8     SNIb/c 54 1
14 ICRF J202206.6+613658 Sy2 20 22 06.68174620 +61 36 58.8047323     19.00 17.58   ~ 318 1
15 BD+66 1309 * 20 33 09.1418548560 +67 01 30.043996356   11.06 10.53     A5 2 0
16 SN 2000E SN* 20 37 13.77 +66 05 50.2   12.85       SNIa 89 1
17 NGC 6951 Sy2 20 37 14.1228088488 +66 06 20.049916392   11.64 10.65     ~ 526 2
18 SN 1999el SN* 20 37 18.03 +66 06 11.9     14.9     SNIIn 66 1
19 SN 2015G SN* 20 37 25.58 +66 07 11.5           SNIbn 29 1
20 HD 197344 * 20 39 26.6490560856 +65 08 44.410749324   8.75 8.59     B8 15 0
21 HD 197911 * 20 43 21.6055381800 +63 12 32.841808344 6.95 7.66 7.67     B5 28 0
22 HD 198781 Pu* 20 49 17.3909110680 +64 02 32.131010292 5.75 6.472 6.451     B0.5V 103 0
23 SN 2001em SN* 21 42 23.6093 +12 29 50.300     18.6     SNIc: 83 1
24 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 344 0
25 SN 2011hw SN* 22 26 14.54 +34 12 59.1           SNIIn: 52 1
26 SN 2014C SN* 22 37 05.60 +34 24 31.9           SNIb 119 1

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