Observations and Modelling of DQ White Dwarfs
  We present spectropolarimetric observations and modelling of 12 DQ white dwarfs. Modelling is based on the method presented in Berdyugina et al. (2005). We use the model to fit the C_2 absorption bands to get atmospheric parameters in different configurations, including stellar spots and stratified atmospheres, searching for the best possible fit. We still have problem to solve before we can give temperature estimates based on the Swan bands alone. 
Tommi Vornanen, Svetlana Berdyugina, Andrei Berdyugin
astro-ph.SR