Projects & Publications
The following list describes projects and consulting activities as well as own investigations, partly in cooperation with the professional astronomy since more than 25 years. Some texts are in German.
1. Different topics:
Einfuehrung in die Spektroskopie
Helium in der Chromosphaere der Sonne
BACHES-Echelle-Spektrograf am CFG Wuppertal
2. Different stars
Line profile observations of beta Lyrae
The Periastron Passage of alpha Oph
Periode und Amplitude der Radialgeschwindigkeit des Cepheiden Polaris
Die Spektren der hellsten Wolf-Rayet-Sterne im Sternbild Cygnus
3. φ Persei
H-alpha-Kurzzeitvariationen in phi Per
Line profile observations of phi Per
4. π Aqrii
Current Minimum of the Halpha EW
Period analysis of the Halpha line profile variation
Doppler tomography of the circumstellar disk
The variable spectrum of pi Aqr
A study of pi Aq during a quasi-normal star phase
Disk-loss and disk-renewal phases in classical Be stars
Long-term high resolution spectroscopy of pi Aqr
Longterm Variability of pi Aqr
Orbital and Stellar Parameters
Simultaneous X-ray and optical monitoring of pi Aqr
5. δ Scorpii
Spectroscopy of the growing circumstellar disk
Pro-am monitoring from July 2000 to May 2015
Visual brightness Vmag and Halpha equivalent width EW
Observation of non-radial pulsation.avi
Ein Doppelstern mit Gasscheibe
Visuelle Helligkeit Vmag und Halpha Äquivalentbreite EW
Report of the periastron passage campaign 2011
Periodic behavior of the HeI6678 emission
Variability of the HeI6678 emission
Spektroskopische Beobachtungen der Halpha und der HeI6678-Emission
HeI 6678 Double Peak Emission Profile Observation 2018-2020
6. 28 Tauri (Plejone)
Hα-Spektroskopie & Vmag Variationen an 28 Tauri (German)
Periastron monitoring of Pleione November 2019 to February 2020
Precession of the disk_Study of the Halpha line profile
Halpha profile evolution (M. Leonardi).gif
The Periastron Passages 2012-2015
Intermediate Results of the Campaign 2014
Long-term behavior of the Halpha emission
7. zeta Tauri
Long-term monitoring of the radial velocity of HeI6678
VtoR Variability of the Halpha Emission
Variability of the Halpha emission line profile
Recent Observations of zeta Tau
Periodic Phases of the VtoR Variability
Monitoring the Radial velocity
Long-term Radial Velocity of the HeI6678 Line
Halpha Observations of zeta Tau
Cyclic Variability of the circumstellar Disk
Mass and precession of the disk
Monitoring of the Halpha emission profile
Disk precession variation seen at the sky.AVI
Observations of non-radial pulsations of HeI4713
Non-radial pulsations (NRP) or co-rotating clouds
8. P Cygni
Continuation of the international observing campaign
Report zur Langzeitstudie (BAV-Report 2014)
Intermediate Report 2013 Photometry and Spectroscopy (JAAVSO Vol. 41, 2013)
Intermediate Report December 2012
Monitoring of the HeI 6678 absorption line intensity (08/2017)
Monitoring of the HeI 6678 absorption line intensity (09/2015)
Halpha and HeI6678 Monitoring of P Cyg (Be Star Newsletter)
International Campaign Photometry and Spectroscopy (JAAVSO Vol. 40, 2012)
Campaign Intermediate report 2016 (BAV Journal No.6 2016)
Long-term Monitoring of the Halpha Line Strength (BSN-March-1999)
Periodic Variation of the Intrinsic Halpha-Line Flux (JAAVSO, Vol. 48, 2020)
Table of the data (period. var. of the intrinsic flux)
Monitoring of the HeI 6678 absorption line intensity (06/2021)
9. VV Cephei
Periodic Halpha emission in the eclipsing binary VV Cep
The long-term binary system VV Cep
Ein Projekt fuer mehrere Jahre
VV Cep Observing Campaign Details
VV Cephei Eclipse Campaign 2017-19
The Symposium on Telescope Science 2015
Oservation of the Halpha emission in VV Cep
Halpha Monitoring vs. V-Brightness
Photometry and Halpha Emission Flux
Brightness & Spectroscopic campaign of the BAV
Campaign to estimate the disk diameter
Spectroscopic Monitoring of the 2017–2019 Eclipse of VV Cephei
Animation Orbital Movement of the B star
10. γ Cassiopeia
Campaign radial velocity HeI6678 (Data).txt
Campaign Monitoring Radial Velocity of HeI6678
HeI6678 line profile disturbances (November 2014)
Halpha radial velocity observations
Monitoring Halpha emission versus Vmag
Relationship between X-ray emission and its circumstellar environment
Halpha and He6678 emission activities correlated
Korrelation von Halpha und He6678 Emissionsaktivitaet
V-Brightness and Halpha Spectroscopy
Possible Hel 6678 Emission Activity (March 2007)
Halpha emission behavior between 1976 and 2006
Halpha emission and Vmag correlations as probes of Be star disks
The relationship between γ Cassiopeiae's X-ray emission and its circumstellar environment (Part I)
The relationship between γ Cassiopeiae's X-ray emission and its circumstellar environment (Part II)
The periodic behavior of the HeI6678 emission line in γ Cas
Correlation Halpha and HeI6678 emission activity in gam Cas from 1995 to 2021
11. Observation of non-radial pulsations
Observations of non-radial pulsations of HeI4713 in zeta Tau
Observation report of non-radial pulsations of delta Sco
Non-radial Pulsations of gamma Cas
Nicht-radiale Pulsationen des Be-Sterns zeta Oph
Non-radial pulsations of zeta Oph
Animated GIF´s of models of stars with non radial pulsations
Stellar pulsation illustrated with glpulse3d (video)