News from AG Draconis

AG Dra is a classical symbiotic star that undergoes major outbursts at intervals between 12-15 years. We present spectroscopic observations of four emission lines (Hα, Hβ, He II 4686 Å, Raman scattered OVI 6825 Å) before, during and after the major outburst that started in 2006. Interesting strength...

Full description

Saved in:
Bibliographic Details
Published inOpen astronomy Vol. 21; no. 1-2; pp. 131 - 138
Main Authors Leedjärv L., Burmeister M.
Format Journal Article
LanguageEnglish
Published De Gruyter 01.01.2012
Subjects
emission lines
individual (ag dra)
spectroscopy
stars
symbiotic
Online AccessGet full text

Cover

More Information
Summary:AG Dra is a classical symbiotic star that undergoes major outbursts at intervals between 12-15 years. We present spectroscopic observations of four emission lines (Hα, Hβ, He II 4686 Å, Raman scattered OVI 6825 Å) before, during and after the major outburst that started in 2006. Interesting strengthenings of the emission lines took place in late 2005 and in early 2008. the latter was followed by a very deep minimum in the line strengths in 2008–2009.
ISSN:2543-6376
DOI:10.1515/astro-2017-0367