C. Inserra, E. Baron, M. Turatto
We compare and analyze a time series of spectral observations obtained during
the first 30 days of evolution of SN 2007od with the non-LTE code PHOENIX.
Despite some spectroscopic particularities in the Balmer features, this
supernova appears to be a normal Type II, and the fits proposed are generally
in good agreement with the observations. As a starting point we have carried
out an analysis with the parameterized synthetic spectrum code SYNOW to confirm
line identifications and to highlight differences between the results of the
two codes. The analysis computed using PHOENIX suggests the presence of a high
velocity feature in H{\beta} and an H{\alpha} profile reproduced with a density
profile steeper than that of the other elements. We also show a detailed
analysis of the ions velocities of the 6 synthetic spectra. The distance is
estimated for each epoch with the Spectral-fitting Expanding Atmosphere Method
(SEAM). Consistent results are found using all the spectra which give the
explosion date of JD 2454403 (29 October, 2007) and a distance modulus \mu =
32.2 \pm 0.3.
View original:
http://arxiv.org/abs/1202.0756
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