2022A&A...657A..64S


Query : 2022A&A...657A..64S

2022A&A...657A..64S - Astronomy and Astrophysics, volume 657A, 64-64 (2022/1-1)

Maximum luminosities of normal stripped-envelope supernovae are brighter than explosion models allow.

SOLLERMAN J., YANG S., PERLEY D., SCHULZE S., FREMLING C., KASLIWAL M., SHIN K. and RACINE B.

Abstract (from CDS):


Context. Stripped-envelope supernovae (SE SNe) of Type Ib and Type Ic are thought to be the result of explosions of massive stars that have lost their outer envelopes. The favored explosion mechanism is via core-collapse, with the shock later revived by neutrino heating. However, there is an upper limit to the amount of radioactive 56Ni that such models can accommodate. Recent studies in the literature point to a tension between the maximum luminosity from such simulations and the observations.
Aims. We used a well-characterized sample of SE SNe from the Zwicky Transient Facility (ZTF) Bright Transient Survey (BTS) to scrutinize the observational caveats regarding estimates of the maximum luminosity (and thus the amount of ejected radioactive nickel) for the sample members.
Methods. We employed the strict selection criteria for the BTS to collect a sample of spectroscopically classified normal Type Ibc SNe, for which we used the ZTF light curves to determine the maximum luminosity. We culled the sample further based on data quality, shape of the light curves, distances, and colors. Then we examined the uncertainties that may affect the measurements. The methodology of the sample construction based on this BTS sample can be used for other future investigations.
Results. We analyzed the observational data, consisting of optical light curves and spectra, for the selected sub-samples. In total, we used 129 Type Ib or Type Ic BTS SNe with an initial rough luminosity distribution peaking at Mr = -17.61 ±0.72, and where 36% are apparently brighter than the theoretically predicted maximum brightness of Mr = -17.8. When we further culled this sample to ensure that the SNe are normal Type Ibc with good LC data within the Hubble flow, the sample of 94 objects gives Mr = -17.64 ±0.54. A main uncertainty in absolute magnitude determinations for SNe is the host galaxy extinction correction, but the reddened objects only get more luminous after corrections. If we simply exclude red objects, or those with unusual or uncertain colors, then we are left with 14 objects at Mr = -17.90 ±0.73, whereof a handful are most certainly brighter than the suggested theoretical limit. The main result of this study is thus that normal SNe Ibc do indeed reach luminosities above 1042.6 erg/s, which is apparently in conflict with existing explosion models.

Abstract Copyright: © ESO 2022

Journal keyword(s): surveys - supernovae: general

VizieR on-line data: <Available at CDS (J/A+A/657/A64): table3.dat phot/* listsp.dat sp/*>

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SN 2019uff SN* 00 19 13.27 -14 23 52.1           SNIb 1 0
2 SN 2020qrx SN* 01 23 58.387 +17 22 09.58           SNIc 1 0
3 SN 2019lfj SN* 01 57 48.75 +13 10 34.2           SNIc 1 0
4 SN 2019qvt SN* 03 09 01.53 +24 02 38.1           SNIb 1 0
5 SN 2020bpf SN* 06 55 23.49 +27 43 19.0           SNIb 1 0
6 SN 2019cad SN* 09 08 42.971 +44 48 46.04           SNIc 5 0
7 SN 2021jao SN* 10 20 52.91 +06 09 24.1           SNIb 1 0
8 SN 2018ijp SN* 10 21 38.051 +08 55 53.03           SNIc 6 0
9 SN 2020ksa SN* 10 59 27.949 +46 07 28.48           SNIb 2 0
10 SN 2020abqx SN* 11 52 24.66 +67 32 51.7           SNIb 1 0
11 SN 2004aw SN* 11 57 50.24 +25 15 55.1   18.06       SNIc 188 1
12 SN 2021gno SN* 12 12 10.294 +13 14 57.03           SNII 5 0
13 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1762 2
14 SN 2020oi SN* 12 22 54.930 +15 49 24.96           SNIc 33 0
15 SN 2021krf SN* 12 51 17.443 +00 31 14.73           SNIc 1 0
16 SN 2020bcq SN* 13 26 29.650 +36 00 31.16           SNIb 2 0
17 SN 2020aut SN* 14 10 13.380 -06 49 20.71           SNIc 2 0
18 SN 2021dwg SN* 14 18 15.96 +00 53 18.4           SNIc 1 0
19 SN 2019pfp SN* 15 37 57.822 +54 23 11.30           ~ 1 0
20 SN 2020hvp SN* 16 21 45.390 -02 17 21.37           SNIb 1 0
21 SN 2018ddu SN* 16 35 46.53 +71 41 15.1           SNIc 1 0
22 SN 2019ieh SN* 16 42 10.83 +06 59 02.4           SNIc 1 0
23 SN 2018dxt SN* 16 58 53.617 +45 17 19.92           SNIc 1 0
24 SN 2019bgl SN* 17 22 03.047 +59 06 53.37           SNIb/c 2 0
25 SN 2019orb SN* 17 40 34.75 +14 52 47.9           SNIc 1 0
26 ZTF19abdoior ev 17 50 10.3170 +40 13 32.986           ~ 1 0
27 ATLAS 21pnp ev 18 56 51.2730 +36 37 20.402           SN.Ic 2 0
28 SN 2019pfb SN* 19 39 47.302 +59 22 04.79           SNIb 4 0
29 SN 2019jyn SN* 22 30 20.322 -14 52 04.25           SNIc 1 0
30 SN 2021gn SN* 23 09 09.980 +28 18 03.85           SNIa 1 0
31 SN 2020zgl SN* 23 28 01.150 -02 09 53.64           SNIb-pec 1 0

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2023.01.31-00:56:35

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