2011A&A...532A.100U


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:30:13

2011A&A...532A.100U - Astronomy and Astrophysics, volume 532A, 100-100 (2011/8-1)

Supernova 2000cb: high-energy version of SN 1987A.

UTROBIN V.P. and CHUGAI N.N.

Abstract (from CDS):

Among type IIP supernovae there are a few events that resemble the well-studied supernova 1987A produced by the blue supergiant in the Large Magellanic Cloud. We study a peculiar supernova 2000cb and compare it with the supernova 1987A. We carried out hydrodynamic simulations of the supernova in an extended parameter space to describe its light curve and spectroscopic data. The hydrogen Hα and Hβ lines are modeled using a time-dependent approach. We constructed the hydrodynamic model by fitting the photometric and spectroscopic observations. We infer a presupernova radius of 35±14R, an ejecta mass of 22.3±1M, an explosion energy of (4.4±0.3)x1051erg, and a radioactive 56Ni mass of 0.083±0.039M. The estimated progenitor mass on the main sequence lies in the range of 24-28M. The early Hα profile on Day 7 is consistent with the density distribution found from hydrodynamic modeling, while the Hα line on Day 40 indicates an extended 56Ni mixing up to a velocity of 8400km/s. We emphasize that the dome-like light curves of both supernova 2000cb and supernova 1987A are entirely powered by radioactive decay. This is unlike normal type IIP supernovae, the plateau of which is dominated by the internal energy deposited after the shock wave propagation through the presupernova. We find signatures of the explosion asymmetry in the photospheric and nebular spectra. The explosion energy of supernova 2000cb is higher by a factor of three compared to supernova 1987A, which poses a serious problem for explosion mechanisms of type IIP supernovae.

Abstract Copyright:

Journal keyword(s): supernovae: general - supernovae: individual: SN 2000cb

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 573 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
3 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4485 2
4 SN 2003Z SN* 09 07 32.46 +60 29 17.5     16.7     SNIIP 60 1
5 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1117 2
6 SN 1998A SN* 11 09 50.33 -23 43 43.1       17.0   SNIIpec 47 1
7 SN 2005cs SN* 13 29 53.37 +47 10 28.2   14.5       SNIIP 329 1
8 SN 2000cb SN* 16 01 32.15 +01 42 23.0     18.0     SNII 47 1
9 IC 1158 G 16 01 34.072 +01 42 28.19   13.2   13.3 12.9 ~ 73 0
10 SN 2009kf SN* 16 12 54.00 +55 38 13.8           SNIIP 41 1
11 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1650 2
12 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 403 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:30:13

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