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NEWS 

Correlation between Hα and HeI6678 emission activity in gamma Cas from 1995 to 2021 

New V/R activity in pi Aqr

Campaign Periastron Passages of Pleione

Spectroscopic Animations


VV Cep up-to-date:  2019-09-20

The current state of the ARAS campaign observation results seems to explain the periodic time behavior of the equivalent width EW and the flux of the Hα emission components V&R.

Based on these results, a new geometric structure of the emission sources has been developed in collaboration with Prof. Dr. Ph. Bennett (Dalhousie University, Halifax, NS, Canada). 

 

  

Link to the animation: disk axis precession

Spectroscopic Monitoring of the 2017–2019 Eclipse of VV Cephei

P Cygni up-to-date

Photometry and Spectroscopy of P Cygni: Periodic Variation of the intrinsic Halpha-line flux

New Publications

1) The Long-term Binary System VV Cep

2) Monitoring the radial velocity of He 6678 of gamma Cas

3) Radial velocity of the HeI 6678 Line of zeta Tau

4) A Time Series of BV Photometry and Halpha Emission Fluxes of the Eclipsing Binary VV Cep

5) Correlation of Halpha Emission Flux with B & V Magnitudes for VV Cep

6) Mass & precession of the disk in zeta Tau

7) Evolution of the disk of pi Aqr: From near disappearance to a strong maximum

8) Photometry and Spectroscopy of P Cygni: Periodic Variation of the intrinsic Halpha-line flux

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