NLTE Analysis of the Ultra-short Period White-dwarf Binary RX J0806.3+1527

J. Steiper, K. Reinsch, S. Dreizler

RX J0806.3+1527 is suspected to be a double-degenerate white dwarf binary. We present first results of our NLTE analysis of its optical spectrum. The VLT/FORS1 data show a composit…