We show how the dense shells of circumstellar gas immediately outside the red supergiants(RSGs) can affect the early optical light curves of Type II-P SNe taking the example of 2013ej. The peak in V, R and I bands, decline rate after peak and plateau length are found to be strongly influenced by the dense CSM formed due to enhanced mass loss during the oxygen and silicon burning stage of the progenitor. We find that the required explosion energy for the progenitors with CSM is reduced by almost a factor of 2.
Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their Aftermaths
- Pub Date:
- February 2017
- radiative transfer;
- individual: 2013ej;
- Astrophysics - High Energy Astrophysical Phenomena
- 6 pages, 7 figure panels, submitted to the Proceedings of IAU Symposium 331, "SN 1987A, 30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths" held at Saint-Gilles-Les-Bains, La Reunion Island, France, 20 - 24 February 2017. eds A. Marcowith et al