69 citations · 119 across the 6 of their papers we have counts for
6 papers
A global view on the colliding-wind binary WR 147
Svetozar A. Zhekov, Blagovest V. Petrov, Toma V. Tomov +1
We present results from a global view on the colliding-wind binary WR 147. We analysed new optical spectra of WR 147 obtained with Gran Telescopio CANARIAS and archive spectra from…
Detection of optical flickering from the symbiotic Mira-type binary star EF Aquilae
V. V. Dimitrov, S. Boeva, J. Martí +8
We performed photometry with a 1 minute time resolution of the symbiotic stars EF Aquilae, AG Pegasi and SU Lyncis in Johnson B and V band. Our observations of the symbiotic Mira-t…
Discovery of optical flickering from the symbiotic star EF Aquilae
R. K. Zamanov, S. Boeva, Y. M. Nikolov +9
We report optical CCD photometry of the recently identified symbiotic star EF Aql. Our observations in Johnson V and B bands clearly show the presence of stochastic light variation…
The Extremes in Intra-Night Blazar Variability: The S4 0954+65 Case
Rumen Bachev, Anton Strigachev, Evgeni Semkov +4
We present results of optical observations of the extremely violently variable blazar S4 0954+65 on intra-night time scales. The object showed flux changes of up to 100% within a f…
Two bi-stability jumps in theoretical wind models for massive stars and the implications for Luminous Blue Variable supernovae
Blagovest Petrov, Jorick S. Vink, Götz Gräfener
Luminous Blue Variables have been suggested to be the direct progenitors of supernova types IIb and IIn, with enhanced mass loss prior to explosion. However, the mechanism of this…
On the H Behaviour of Blue Supergiants: Rise and Fall over the Bi-stability Jump
Blagovest Petrov, Jorick S. Vink, Götz Gräfener
The evolutionary state of blue supergiants is still unknown. Stellar wind mass loss is one of the dominant processes determining the evolution of massive stars, and it may provide…