583 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto de Astrofísica de AndalucíaES41 papers
- Instituto de Astrofísica de CanariasES17 papers
- Instituto de Física de CantabriaES17 papers
- Universidad de La LagunaES16 papers
- Centro de AstrobiologíaES14 papers
- Universidad Complutense de MadridES14 papers
- Universidad de CantabriaES14 papers
- Instituto de Radioastronomía MilimétricaES12 papers
- Universidad Nacional Autónoma de MéxicoMX12 papers
- European Space Astronomy CentreES11 papers
- Mbarara University of Science and TechnologyUG11 papers
- North-West UniversityZA11 papers
7 papers · 1 filter
A search for period changes of eight short-period Type II Cepheids
Alemiye M. Yacob, Leonid N. Berdnikov, Elena N. Pastukhova +2
In this study, we investigate the period changes of eight short-period Type II Cepheids of the BL Her subtype, i.e., with periods in the 1-4 day range. The diagrams for these…
The shock driving capability of a CME inferred from multiwavelength observations
Fithanegest Kassa Dagnew, Nat Gopalswamy, Solomon Belay Tessema +4
The radial speed of a coronal mass ejection (CME) determines the shock-driving capability of a CME as indicated by the presence of a type II radio burst. Here we report on the Apri…
Optical spectroscopy of the blue supergiant Sk-69 279 and its circumstellar shell with SALT
V. V. Gvaramadze, A. Y. Kniazev, O. V. Maryeva +1
We report the results of optical spectroscopy of the blue supergiant Sk-69 279 and its circular shell in the Large Magellanic Cloud (LMC) with the Southern African Large Telescope…
The jet of the young star RW Aur A and related problems
L. N. Berdnikov, M. A. Burlak, O. V. Vozyakova +3
Comparing the images of the jet of the young star RW Aur A, separated by a period of 21.3 years, we found that the outermost jet's knots have emerged yr ago. We argue…
Binary Properties from Cepheid Radial Velocities (CRaV)
Nancy Remage Evans, Leonid Berdnikov, Jennifer Lauer +6
We have examined high accuracy radial velocities of Cepheids to determine the binary frequency. The data are largely from the CORAVEL spectrophotometer and the Moscow version, with…
WS1: one more new Galactic bona fide luminous blue variable
A. Y. Kniazev, V. V. Gvaramadze, L. N. Berdnikov
In this Letter, we report the results of spectroscopic and photometric monitoring of the candidate luminous blue variable (LBV) WS1, which was discovered in 2011 through the detect…
Discovery of a new Galactic bona fide luminous blue variable with Spitzer
V. V. Gvaramadze, A. Y. Kniazev, L. N. Berdnikov +3
We report the discovery of a circular mid-infrared shell around the emission-line star Wray 16-137 using archival data of the Spitzer Space Telescope. Follow-up optical spectroscop…