2020ApJ...889L...6C

Query : 2020ApJ...889L...6C

2020ApJ...889L...6C - Astrophys. J., 889, L6-L6 (2020/January-3)

The most rapidly declining Type I supernova 2019bkc/ATLAS19dqr.

CHEN P., DONG S., STRITZINGER M.D., HOLMBO S., STRADER J., KOCHANEK C.S., PENG E.W., BENETTI S., BERSIER D., BROWNSBERGER S., BUCKLEY D.A.H., GROMADZKI M., MORAN S., PASTORELLO A., AYDI E., BOSE S., CONNOR T., BOUTSIA K., DI MILLE F., ELIAS-ROSA N., FRENCH K.D., HOLOIEN T.W.-S., MATTILA S., SHAPPEE B.J., STARK A.A. and SWIHART S.J.

Abstract (from CDS):

We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- and r-band decline between peak and 10 days post peak of Δm10(B)=5.24±0.07 mag and Δm10(r)=3.85±0.10 mag, respectively, SN 2019bkc is the most rapidly declining SN I discovered so far. While its closest matches are the rapidly declining SN 2005ek and SN 2010X, the light curves and spectra of SN 2019bkc show some unprecedented characteristics. SN 2019bkc appears "hostless," with no identifiable host galaxy near its location, although it may be associated with the galaxy cluster MKW1 at z = 0.02. We evaluate a number of existing models of fast-evolving SNe, and we find that none of them can satisfactorily explain all aspects of SN 2019bkc observations.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Supernovae

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 - 2026 		#notes
1 OGLE 2013-SN-79 SN* 00 35 10.20 -67 41 08.5           SNI 16 0
2 SN 2007gr SN* 02 43 27.98 +37 20 44.7       12.77   SNIc 265 1
3 SN 2005ek SN* 03 05 48.96 +36 46 10.6     17.5     SNIc: 76 1
4 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 85 1
5 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 86 1
6 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
7 SN 2010jp SN* 06 16 30.63 -21 24 36.3           SNIIn 42 1
8 SN 1999by SN* 09 21 52.07 +51 00 06.6   13.66       SNIap 307 1
9 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
10 PS1-12bb ev 09 57 23.866 +03 11 04.47           ~ 16 0
11 NGC 3083 EmG 09 59 49.6745418672 -02 52 38.914483332   14.2       ~ 27 0
12 NGC 3086 GiG 10 00 10.9925594184 -02 58 34.265514288   14.5       ~ 25 0
13 2dFGRS TGN216Z089 GiC 10 00 14.6989771728 -02 59 23.331111612   16.866   15.563   ~ 7 0
14 LEDA 1078275 AG? 10 00 18.93264 -03 00 07.5168   18.175   16.957   ~ 5 0
15 SDSS J100019.65-030111.1 ? 10 00 19.65504 -03 01 11.1252           ~ 1 0
16 SDSS J100020.27-030059.3 ? 10 00 20.27160 -03 00 59.3136           ~ 1 0
17 SDSS J100020.59-030054.6 ? 10 00 20.59944 -03 00 54.6624           ~ 1 0
18 SN 2019bkc SN* 10 00 22.544 -03 01 12.64           SNIc 33 0
19 6dFGS gJ100027.0-025650 GiC 10 00 26.9519239824 -02 56 50.052333048   16.31   15.10   ~ 18 0
20 2dFGRS TGN216Z080 G 10 00 27.17 -03 01 15.2   19.056   17.879   ~ 3 0
21 NGC 3090 rG 10 00 30.23064 -02 58 08.4468   14.2       ~ 44 1
22 NAME NGC 3090 Group GrG 10 00 37.93 -02 57 45.3     13.88     ~ 46 0
23 Z 8-18 GiC 10 00 41.4818422248 -02 57 22.740711516   16.134   14.737   ~ 19 0
24 NGC 3092 GiG 10 00 47.4348215616 -03 00 44.629745076   14.5       ~ 31 0
25 2dFGRS TGN217Z145 GiC 10 00 48.7917717984 -03 02 24.230240304   16.252   14.975   ~ 9 0
26 NGC 3093 GiG 10 00 53.5875483384 -02 58 19.224087636   15.1   14.297   ~ 21 0
27 NGC 3101 GiG 10 01 35.4243535632 -02 59 40.073315892   15.6   14.192   ~ 20 0
28 SN 2004aw SN* 11 57 50.24 +25 15 55.1   18.06       SNIc 209 1
29 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
30 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
31 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 645 1
32 KSN 2015k SN* 13 31 51.60 -10 44 09.6           ~ 27 0
33 PS1-13dwm ev 22 20 12.081 +00 56 22.35           ~ 8 0
34 SN 2014ft SN* 23 33 27.95 +33 38 46.1           SNIc 58 0
35 NAME Local Group GrG ~ ~           ~ 9325 0

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