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Paper: Spectroscopic Observations of WW Vul During the 2008–2010 Eclipse
Volume: 510, Stars: From Collapse to Collapse
Page: 174
Authors: Rustamov, B. N.; Mikayilov, Kh. M.; Mejidova, S. O.
Abstract: The changes in the regime of variability of the Hα 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 Hα 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 Hα line profile parameters are changing its direction of variability from 2007 to 2008.
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