2006A&A...460..245P

We present the results of modelling the 0.45-1µm spectral energy distribution of V838 Mon for 2002 November. Synthetic spectra were calculated using the NextGen model atmospheres of Hauschildt et al. (1999ApJ...512..377H), which incorporate line lists for H₂O, TiO, CrH, FeH, CO, and MgH, as well as the VALD atomic line list. Fits to the observed spectra show that, in 2002 November, the effective temperature of V838 Mon was approximately 2000±100K. Our theoretical spectra show a comparatively weak dependence on logg. Preliminary analysis of the hot star observed together with V838 Mon shows it to be a normal B3V dwarf.