[vsnet-alert 9460] Nova Vul 2007: rapid spectral evolution, double peaks, Fe II series lines

[Taichi Kato]

   Fujii-san reported rapid evolution of the spectrum of Nova Vul 2007.
The spectrum taken on Aug 10
http://www1.harenet.ne.jp/~aikow/etc/n_vul_20070810.gif
shows prominent Fe II series lines and weaker He I lines.
The Balmer, He I, Fe II lines are doubly peaked (separation ~2200 km/s
for He I lines, ~1000 km/s for Balmer and Fe II lines).
The blue continuum was weaker than on Aug 9, consistent with the
photometric color variation.