Figure 2 from FLASH SPECTROSCOPY: EMISSION LINES FROM THE IONIZED CIRCUMSTELLAR MATERIAL AROUND <10-DAY-OLD TYPE II SUPERNOVAE

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FLASH SPECTROSCOPY: EMISSION LINES FROM THE IONIZED CIRCUMSTELLAR MATERIAL AROUND <10-DAY-OLD TYPE II SUPERNOVAE

Authors: D. Khazov, O. Yaron, A. Gal-Yam, I. Manulis, A. Rubin, S. R. Kulkarni, I. Arcavi, M. M. Kasliwal, E. O. Ofek, Y. Cao, D. Perley, J. Sollerman, A. Horesh, M. Sullivan, A. V. Filippenko, P. E. Nugent, D. A. Howell, S. B. Cenko, J. M. Silverman, H. Ebeling, F. Taddia, J. Johansson, R. R. Laher, J. Surace, U. D. Rebbapragada, P. R. Wozniak, and T. Matheson

2016 The Astrophysical Journal 818 3.

Provider: AAS Journals

Caption: Figure 2.

Spectral evolution of two of the FI events. The emission lines disappear within a few days, and P Cygni line profiles develop over time. These well-observed objects would be classified as FI if found prior to day 3 and as BF if found around day 5, demonstrating the evolution of SNe II, and why our measured FI fraction is only a lower limit on the true frequency of SNe having dense CSM. Data from Gal-Yam et al. (2014) and Smith et al. (2015).

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