2017ApJ...848...86H


Query : 2017ApJ...848...86H

2017ApJ...848...86H - Astrophys. J., 848, 86-86 (2017/October-3)

A tale of two impostors: SN2002kg and SN1954J in NGC 2403.

HUMPHREYS R.M., DAVIDSON K., VAN DYK S.D. and GORDON M.S.

Abstract (from CDS):

We describe new results on two supernova impostors in NGC 2403, SN 1954J(V12) and SN 2002kg(V37). For the famous object SN 1954J, we combine four critical observations: its current SED, its Hα emission line profile, the Ca II triplet in absorption in its red spectrum, and the brightness compared to its pre-event state. Together, these strongly suggest that the survivor is now a hot supergiant with T ∼ 20,000 K, a dense wind, substantial circumstellar extinction, and a G-type supergiant companion. The hot star progenitor of V12's giant eruption was likely in the post-red supergiant stage and had already shed a lot of mass. V37 is a classical LBV/S Dor variable. Our photometry and spectra observed during and after its eruption show that its outburst was an apparent transit on the HR Diagram due to enhanced mass loss and the formation of a cooler, dense wind. V37 is an evolved hot supergiant at ≃106 L with a probable initial mass of 60-80 M.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: massive - stars: variables: S Doradus - supernovae: individual: (SN1954J, SN2002kg) - supernovae: individual: (SN1954J, SN2002kg)

Simbad objects: 18

goto Full paper

goto View the references in ADS

Number of rows : 18
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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11546 1
2 [HS53] C s*b 01 33 35.1032949241 +30 36 00.286911666 15.543 16.531 16.429 16.297 16.137 LBV 61 0
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5383 1
4 Ass Per OB 1 As* 02 21 +57.6           ~ 163 1
5 SN 1961V SN* 02 43 36.42 +37 20 43.6   12.7 12.5     SNIIpec? 200 2
6 NAME UGC 2773 OT2009-1 SN? 03 32 07.24 +47 47 39.6           ~ 49 1
7 HD 269006 s*b 05 02 07.3944119328 -71 20 13.118657760 9.93 10.60 10.55 10.43 10.38 LBV 239 0
8 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 1021 0
9 V* S Dor sg* 05 18 14.3572490675 -69 15 01.148131817 9.08 10.39 10.25 9.74 9.14 A5Iaeq 357 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15675 1
11 HD 269858 s*b 05 36 43.6942807271 -69 29 47.449383685   10.24 10.15 9.95 9.05 LBV 272 2
12 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1663 1
13 SN 1954J SN* 07 36 56.20 +65 37 52.3   16.3 16.50     SNIIpec? 91 2
14 TS V37 s*b 07 37 01.83 +65 34 29.3     19     LBV 61 1
15 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 933 2
16 SN 2000ch SN* 10 52 41.40 +36 40 09.5     17.4     SNIIn? 85 2
17 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1147 1
18 SN 2009ip s*b 22 23 08.26 -28 56 52.4           LBV 298 0

To bookmark this query, right click on this link: simbad:objects in 2017ApJ...848...86H and select 'bookmark this link' or equivalent in the popup menu


2021.12.07-08:05:04

© Université de Strasbourg/CNRS

    • Contact