Spectral Observations of Star WW Vul II. Hα Emission Line in 2007-2010
Abstract
The results of investigations of the emission line Hα in the spectra of the UX Ori type star, WW Vul on the basis of spectral observations performed at ShAO, NAS of Azerbaijan in 2006- 2010, using 2-m telescope are presented. The variability of all measured parameters of the profile of the line Hα, as during each observational season, as from a season to season has been revealed. The comparative analysis of results of our investigations and published researches has led to such conclusion, that the rate of outflow with the variable power from the star WW Vul as a whole occurs almost within 40 years (1972-2010) and occasionally has been observed the returning a part of the thrown out matter back to the star surface. The variability of behavior of the emission line Hα during observational seasons 2006 and 2007-2010 was revealed. In four cases (on the dates 08.07.06; 17.08.08; 13.06.10 and 02.08.10) the second emission component in the blue wing of the emission line Hα has been observed.
- Publication:
-
Azerbaijani Astronomical Journal
- Pub Date:
- December 2012
- Bibcode:
- 2012AzAJ....7d..20M
- Keywords:
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- Herbig Ae stars;
- spectra;
- emission line Hα;
- accretion disk