16 citations · 61 across the 7 of their papers we have counts for
7 papers
Do novae have optically thick winds during outburst with large deviations from spherical symmetry?
Michael Friedjung
The evidence for the presence of optically thick winds, produced by classical novae after optical maximum, has been challenged in recent papers. In addition, signs of orbital phase…
A long term spectroscopic and photometric study of the old nova HR Del
M. Friedjung, M. Dennefeld, I. Voloshina
The Nova HR Del, discovered in 1967, was found to be exceptionally bright in the optical and UV during the whole lifetime of the IUE satellite (ending in 1996) and appears to be st…
Line formation regions of the UV spectrum of CI Cygni
J. Mikolajewska, M. Friedjung, C. Quiroga
We have examined radial velocities and fluxes of ultraviolet emission lines at different epochs, deduced from archival IUE and GRHS/HST spectra. The line fluxes give electron densi…
The effect of dust obscuration in RR Tel on optical and IR long-term photometry and Fe II emission lines
D. Kotnik-Karuza, M. Friedjung, P. A. Whitelock +4
Infrared and optical photometric and spectroscopic observations of the symbiotic nova RR Tel are used to study the effects and properties of dust in symbiotic binaries containing a…
Analysis of the circumstellar environment of the B[e] star HD 45677 (FS CMa)
Gérard Muratorio, Corinne Rossi, Michael Friedjung
We studied the circumstellar environment of the B[e] star HD 45677 through the analysis of the emission lines from ionized metals. We used the statistical approach of the self abso…
The possible orbital period of the nova V1493 Aquilae
Andrej Dobrotka, Michael Friedjung, Alon Retter +2
Period analysis of CCD photometry of V1493 Aql (Nova Aql 1999 no. 1) performed during 12 nights through I and R filters a few weeks after maximum is presented. The PDM method for p…