902 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Bulgarian Academy of SciencesBG224 papers
- Centre National de la Recherche ScientifiqueFR67 papers
- Sofia University "St. Kliment Ohridski"BG64 papers
- Shumen UniversityBG62 papers
- Instituto de Astrofísica de CanariasES57 papers
- Instituto de Astrofísica de AndalucíaES55 papers
- National Institute for AstrophysicsIT54 papers
- Universidad de La LagunaES50 papers
- Astronomical ObservatoryRS48 papers
- Evgeni Kharadze Georgian National Astrophysical ObservatoryGE45 papers
- Aryabhatta Research Institute of Observational SciencesIN43 papers
- Osservatorio Astrofisico di TorinoIT43 papers
13 papers · 2 filters
High Energy Processes in Wolf-Rayet Stars
Stephen L. Skinner, Werner Schmutz, Manuel Guedel +1
Wolf-Rayet (WR) stars are massive (10 M) evolved stars undergoing advanced nuclear burning in their cores, rapidly approaching the end of their lives as supernovae.…
Spectral observations of X Persei: Connection between H-alpha and X-ray emission
R. Zamanov, K. A. Stoyanov, U. Wolter +2
We present spectroscopic observations of the Be/X-ray binary X Per obtained during the period 1999 - 2018. Using new and published data, we found that during "disc-rise" the expans…
The W UMa binaries USNO-A2.0 1350-17365531, V471 Cas, V479 Lac and V560 Lac: light curve solutions and global parameters based on the GAIA distances
Diana P. Kjurkchieva, Velimir A. Popov, Yordanka Eneva +1
We present photometric observations in Sloan filters g', i' of the eclipsing W UMa stars USNO-A2.0 1350-17365531, V471 Cas, V479 Lac and V560 Lac. The sinusoidal-like O-C diagram o…
An XMM-Newton observation of the symbiotic star AG Peg: the X-ray emission after the end of its 2015 outburst
Svetozar A. Zhekov, Toma V. Tomov
We present an analysis of the XMM-Newton observation of the symbiotic star AG Peg, obtained after the end of its 2015 outburst. The X-ray emission of AG Peg is soft and of thermal…
Response to comment on "An excess of massive stars in the local 30 Doradus starburst"
F. R. N. Schneider, H. Sana, C. J. Evans +29
Farr and Mandel reanalyse our data, finding initial-mass-function slopes for high mass stars in 30 Doradus that agree with our results. However, their reanalysis appears to underpr…
The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst
F. R. N. Schneider, O. H. Ramírez-Agudelo, F. Tramper +24
The 30 Doradus (30 Dor) nebula in the Large Magellanic Cloud (LMC) is the brightest HII region in the Local Group and a prototype starburst similar to those found in high redshift…
The recurrent nova RS Oph - simultaneous B and V band observations of the flickering variability
R. K. Zamanov, S. Boeva, G. Y. Latev +7
We performed 48.6 hours (in 28 nights) of simultaneous B and V band observations of the flickering variability of the recurrent nova RS Oph in quiescence. During the time of our ob…
NSVS 2569022: a peculiar binary among the W UMa stars with extremely small mass ratios
Diana P. Kjurkchieva, Velimir A. Popov, Nikola I. Petrov
Photometric observations of the W UMa binary NSVS 2569022 are presented. The light curve solution reveals that both components are of F spectral type (temperatures ==6100…
Long-term BVRI photometric light curves of 15 PMS stars in the IC 5070 star-forming region
Sunay Ibryamov, Evgeni Semkov, Teodor Milanov +1
This paper reports the results from the multicolor photometric observations of 15 pre-main sequence stars collected in the period 2010 September - 2017 October. The stars from our…
Evolution of the magnetic field of Betelgeuse from 2009 - 2017
P. Mathias, M. Aurière, A. López Ariste +14
Betelgeuse is an M-type supergiant that presents a circularly polarized (Stokes V) signal in its line profiles, interpreted in terms of a surface magnetic field. The weak circular…
Spectroscopic and physical parameters of Galactic O-type stars. III. Mass discrepancy and rotational mixing
Nevena Markova, Joachim Puls, Norbert Langer
Massive stars play a key role in the evolution of the Universe. Our goal is to compare observed and predicted properties of single Galactic O stars to identify and constrain uncert…
V2492 Cygni: Optical BVRI variability during the period 2010-2017
Sunay I. Ibryamov, Evgeni H. Semkov, Stoyanka P. Peneva
Results from BVRI photometric observations of the young stellar object V2492 Cyg collected during the period from August 2010 to December 2017 are presented. The star is located in…
An excess of massive stars in the local 30 Doradus starburst
F. R. N. Schneider, H. Sana, C. J. Evans +29
The 30 Doradus star-forming region in the Large Magellanic Cloud is a nearby analogue of large star-formation events in the distant Universe. We determine the recent formation hist…