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
12 papers · 2 filters
Bipolar ejection by the symbiotic binary system Z And during its 2006 outburst
N. A. Tomov, M. T. Tomova, D. V. Bisikalo
High resolution data in the region of the line Halpha have been obtained at the time of the light maximum and after it of the 2006 optical outburst of the symbiotic binary Z And. A…
Multicolour CCD Measurements of Visual Double and Multiple Stars. III
P. Lampens, A. Strigachev, D. Duval
Recent CCD observations were performed in the period 1998-2004 for a large sample of visual double and multiple stars selected from the Hipparcos Catalogue and/or from the Gliese C…
CCD photometric search for peculiar stars in open clusters. VIII. King 21, NGC 3293, NGC 5999, NGC 6802, NGC 6830, Ruprecht 44, Ruprecht 115, and Ruprecht 120
M. Netopil, E. Paunzen, H. M. Maitzen +5
We continue our survey for magnetic chemically peculiar (CP2) stars in galactic open clusters to shed more light on their origin and evolution. To study the group of CP2 stars, it…
A Study of an Outburst in the Classical Symbiotic Star Z And in a Colliding-Wind Model
D. V. Bisikalo, A. A. Boyarchuk, E. Yu. Kilpio +2
Two-dimensional gas-dynamical modeling of the mass-flow structure is used to study the outburst development in the classical symbiotic star Z And. The stage-by-stage rise of the li…
Chemically peculiar stars in the Large Magellanic Cloud
E. Paunzen, H. M. Maitzen, O. I. Pintado +3
The detection of magnetic chemically peculiar (CP2) stars in open clusters of extragalactic systems can give observational answers to many unsolved questions. The mean percentage o…
Relaxed constraints on neutrino oscillation parameters
Daniela P. Kirilova, Mariana P. Panayotova
We study the cosmological constraints on active-sterile neutrino oscillations nu_e <-> nu_s for the case when nu_s is partially filled initially, i.e. 0 < delta N_s < 1. We provide…
The superimposed photospheric and stellar wind variability of the O-type supergiant alpha Cam
R. K. Prinja, N. Markova, S. Scuderi +1
(Abridged) We provide empirical constraints on the different physical components that can act to yield temporal variability in predominantly or partially wind-formed optical lines…
Tracing Quasar Accretion Rates at Higher Redshifts
R. S. Bachev
In this work we connect some measurable properties of the CIV1549 emission line with the quasar accretion rates (Eddington ratios). A tight correlation is found for a sample of mor…
The Recurrent Eclipse of an Unusual Pre--Main-Sequence Star in IC 348
S. Nordhagen, W. Herbst, E. C. Williams +1
The recurrence of a previously documented eclipse of a solar-like pre--main-sequence star in the young cluster IC 348 has been observed. The recurrence interval is 4.7 yr…
Bright OB stars in the Galaxy - III. Constraints on the radial stratification of the clumping factor in hot star winds from a combined Halpha, IR and radio analysis
J. Puls, N. Markova, S. Scuderi +4
Recent results strongly challenge the canonical picture of massive star winds: various evidence indicates that currently accepted mass-loss rates, Mdot, may need to be revised down…
Rotational velocities of the giants in symbiotic stars: II. Are S-type symbiotics synchronized?
R. K. Zamanov, M. F. Bode, C. H. F. Melo +5
We have measured the projected rotational velocities (v sin i) of the mass donors for 29 S-type symbiotic stars using high resolution spectroscopic observations and the cross-corre…
CCD photometric search for peculiar stars in open clusters. VII. Berkeley 11, Berkeley 94, Haffner 15, Lynga 1, NGC 6031, NGC 6405, NGC 6834 and Ruprecht 130
E. Paunzen, M. Netopil, I. Kh. Iliev +3
The detection of magnetic chemically peculiar (CP2) stars in open clusters of the Milky Way can be used to study the influence of different galactic environments on the (non-)prese…