Spectroscopic Observations of WW Vul During the 2008-2010 Eclipse

摘要

The changes in the regime of variability of the Ha emission line profile in the spectrum of WW Vul have been revealed in 2006 and 2007-2010. Starting from 2007, in addition to the accretion disk rotation, an additional mechanism leading to rapid changes in physical conditions in the Ha formation region probably appears. The behavior of the Ha emission line in the spectrum of the star WW Vul is qualitatively is in agreement with the unusual photometric behavior - eclipse which took place in 2008-2010. Meanwhile almost all of the Ha line profile parameters are changing its direction of variability from 2007 to 2008.