2019A&A...628A...7A


Query : 2019A&A...628A...7A

2019A&A...628A...7A - Astronomy and Astrophysics, volume 628A, 7-7 (2019/8-1)

A meta-analysis of core-collapse supernova 56Ni masses.

ANDERSON J.P.

Abstract (from CDS):


Context. A fundamental property determining the transient behaviour of core-collapse supernovae (CC SNe) is the amount of radioactive 56Ni synthesised in the explosion. Using established methods, this is a relatively easy parameter to extract from observations.
Aims. I provide a meta-analysis of all published 56Ni masses for CC SNe.
Methods. Collating a total of 258 literature 56Ni masses, I compared distributions of the main CC SN types: SNe II, SNe IIb, SNe Ib, SNe Ic, and SNe IcBL. Results. Using these published values, I calculated a median 56Ni mass of 0.032M for SNe II (N=115), 0.102M for SNe IIb (N=27), 0.163M for SNe Ib (N=33), 0.155M for SNe Ic (N=48), and 0.369M for SNe IcBL (N=32). On average, stripped-enevelope SNe (SE-SNe: IIb, Ib, Ic, and Ic-BL) have much higher values than SNe II. These observed distributions are compared to those predicted from neutrino-driven explosion models. While the SN II distribution follows model predictions, the SE-SNe have a significant fraction of events with 56Ni masses much higher than predicted.Conclusions. If the majority of published 56Ni masses are to be believed, these results imply significant differences in the progenitor structures and/or explosion properties between SNe II and SE-SNe. However, such distinct progenitor and explosion properties are not currently favoured in the literature. Alternatively, the popular methods used to estimate 56Ni masses for SE-SNe may not be accurate. Possible issues with these methods are discussed, as are the implications of true 56Ni mass differences on progenitor properties of different CC SNe.

Abstract Copyright: © ESO 2019

Journal keyword(s): supernovae: general - stars: massive

Simbad objects: 7

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Number of rows : 7
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 2016gkg SN* 01 34 14.46 -29 26 25.0           SNIIb 94 0
2 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4945 2
3 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1419 1
4 SN 2017ein SN* 11 52 53.26 +44 07 26.2           SNIc 52 0
5 SN 2011dh SN* 13 30 05.10555 +47 10 10.9227           SNIIb 391 1
6 iPTF 13bvn SN* 15 00 00.152 +01 52 53.17           SNIb 172 0
7 SN 2016coi SN* 21 59 04.14 +18 11 10.5           SNIc 58 0

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