Figure 3 from Early Observations and Analysis of the Type Ia SN 2014J in M82

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Early Observations and Analysis of the Type Ia SN 2014J in M82

Authors: G. H. Marion, D. J. Sand, E. Y. Hsiao, D. P. K. Banerjee, S. Valenti, M. D. Stritzinger, J. Vinkó, V. Joshi, V. Venkataraman, N. M. Ashok, R. Amanullah, R. P. Binzel, J. J. Bochanski, G. L. Bryngelson, C. R. Burns, D. Drozdov, S. K. Fieber-Beyer, M. L. Graham, D. A. Howell, J. Johansson, R. P. Kirshner, P. A. Milne, J. Parrent, J. M. Silverman, R. J. Vervack, Jr., and J. C. Wheeler

Marion et al. 2015 The Astrophysical Journal 798 39.

Provider: AAS Journals

Caption: Figure 3.

Velocity measurements for several lines plotted by phase. Mg II velocities before −3d form two groups that appear to be correlated with oscillator strength. The low gf Mg II lines (red) and O I remain essentially constant after −9d, while the high gf Mg II lines (blue) are about 2000 km s⁻¹ faster at −10d. They decline quickly and reach the same velocity as other Mg II lines by about −4d. Si II velocities appear to establish a plateau at about +2d. S II and Fe II continue to decline. Velocity measurements are listed in Tables 5 and 6.

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