Spectroscopic Diagnosis on Symbiotic Star Z and During Recent Outburst Phase
This report aims to present preliminary results of spectroscopic diagnosis on symbiotic star Z And during recent outburst phenomenon. We have made high dispersion spectroscopy with HIDES (HIgh Dispersion Echelle Spectrograph) at Okayama Astrophysical Observatory (OAO) since Jan. 2001. Z And is a binary system with an orbital period of 758.8 day. We are concerned with distinguishing spectroscopic characteristics at outburst phase from quiescent one, and from the orbital change. The most conspicuous feature of spectroscopic results is the violet shift of He IIλ686 and [Fe VII] λ6087 as a whole and susequent gradual returning to their original wavelengths. Broad Hα line-profiles do not show drastic changes except complicated behavior of violet side those are already noticed by previous study.
KeywordsStars-symbiotic Stars-Z And Spetroscopy-high dispersion
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