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:

Objekte fuer Einsteiger 

Beginner and students support

Einfuehrung in die Spektroskopie

Spektroskopie der Sonne

Helium in der Chromosphaere der Sonne

BACHES-Echelle-Spektrograf am CFG Wuppertal

 2. Different stars

Spektren planetarischer Nebel

Halpha Observations of HR2142

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

Monitoring Halpha EW and V/R

Evolution of the disk

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

pi Aqr is a gam Cas object

Simultaneous X-ray and optical monitoring of pi Aqr

The Be spectrum 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

Movie Periastron

Halpha period analysis

Ein Doppelstern mit Gasscheibe

Visuelle Helligkeit Vmag und Halpha Äquivalentbreite EW

The 2011 Periastron Passage

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 Short-Time Variations

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

The Halpha VtoR ratio      

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

VV Cep (2019-02-22)

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

VVCep Outside eclipse

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

HeI 6678 VtoR and EW Campaign

Possible Hel 6678 Emission Activity (March 2007)

HeI 6678 Emission Activity

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)

 12. Monitoring of the ejection behavior of Rho Cas; Line flux and radial velocity     of the Hα double peak emission