Mon. Not. R. Astron. Soc., 483, 1211-1223 (2019/February-2)
The role of radioactive nickel in shaping the plateau phase of Type II supernovae.
KOZYREVA A., NAKAR E. and WALDMAN R.
Abstract (from CDS):
In the present study, we systematically explore the effect of the radioactive 56
Ni and its mixing properties in the ejecta on the plateau of Type IIP supernovae (SNe IIP). We evaluate the importance of 56
Ni in shaping light curves of SNe IIP by simulating light curves for two red supergiant models using different amounts of 56
Ni and with different types of mixing: uniform distribution of 56
Ni out to different fractions of the envelope and 'boxcar' distribution of 56
Ni. We find, similarly to previous studies, that 56
Ni extends duration of the plateau. We find a formula to estimate the extension based on the observed bolometric light curves and show that for most SNe IIP 56
Ni extends the plateau by about 20 per cent. Another effect of 56
Ni consists in reduction of the plateau decline rate, i.e. 56
Ni presented in the ejecta flattens the plateau. Our simulations suggest that for typical SNe IIP it can reduce the decline rate by about 1 mag per 100 d. We find that for the contribution of 56
Ni seen in most supernovae (SNe) our simulated bolometric light curves resemble observed ones for various types of 56
Ni mixing. We thereby cannot determine the level of 56
Ni mixing in these SNe based on the light curve alone. However, for SN 2009ib we find that only a model where 56
Ni is mixed significantly throughout most of the hydrogen envelope is consistent with the observed light curve. Our light curves are available via link https://wwwmpa.mpa-garching.mpg.de/ccsnarchive/data/Kozyreva2018/
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
radiative transfer - stars: massive - supernovae: general
Status at CDS
Large table(s) will be appraised for possible ingestion in VizieR.
View the references in ADS
To bookmark this query, right click on this link: simbad:2019MNRAS.483.1211K and select 'bookmark this link' or equivalent in the popup menu