Analyzing SN2003Z with PHOENIX

TL;DR

This paper models the spectra of supernova SN 2003Z using the PHOENIX code to determine physical parameters like luminosity, velocity, and metallicity from observed spectra.

Contribution

It presents detailed synthetic spectral modeling of SN 2003Z with PHOENIX, including NLTE effects and line blanketing, to extract physical parameters from observations.

Findings

Estimated luminosity and velocity profiles

Determined color excess and metallicity

Validated spectral modeling approach

Abstract

We present synthetic spectra around maximum for the type II supernova SN 2003Z, which was first detected on January 29.7 2003. Comparison with observed spectra aim at the determination of physical parameters for SN 2003Z. Synthetic spectra are calculated with our stellar atmosphere code PHOENIX. It solves the special relativistic equation of radiative transfer, including large NLTE-calculations and line blanketing by design, in 1-dimensional spherical symmetry. The observed spectra were obtained at the 3.5 meter telescope at Calar Alto. The TWIN instrument was used so that a spectral range from about 3600 to 7500 Angstroem was covered. The spectra were taken on Feb. 4, 5, 9, and 11, 2003. The physical parameters of the models give the luminosities, a range of possible velocity profiles for the SN, an estimate of the colour excess, and the observed metalicity.