10.6k citations
- Russian Academy of SciencesRU490 papers
- Lomonosov Moscow State UniversityRU258 papers
- Centre National de la Recherche ScientifiqueFR176 papers
- Kazan Federal UniversityRU165 papers
- St Petersburg UniversityRU160 papers
- Pulkovo ObservatoryRU130 papers
- Isaac Newton InstituteCL123 papers
- Instituto de Astrofísica de CanariasES122 papers
- National Institute for AstrophysicsIT120 papers
- University of CambridgeGB111 papers
- California Institute of TechnologyUS109 papers
- Max Planck Institute for Radio AstronomyDE101 papers
26 papers · 2 filters
To the problem of spectral mimicry of supergiants
V. G. Klochkova, E. L. Chentsov
The phenomenon of spectral mimicry refers to the fact that hypergiants and post-AGB supergiants - stars of different masses in fundamentally different stages of their evolution hav…
Spotted surface structure of the active giant PZ Mon
Yu. V. Pakhomov, K. A. Antonyuk, N. I. Bondar' +3
Based on our photometric observations in 2015-2016 and archival photometric data for the active red giant PZ Mon, we have found the main characteristics of the stellar surface: the…
Features of Microwave Radiation and Magnetographic Characteristics of Solar Active Region NOAA 12242 Before the X1.8 Flare on December 20, 2014
V. E. Abramov-Maximov, V. N. Borovik, L. V. Opeikina +2
This paper continues the cycle of authors' works on the detection of precursors of large flares (M5 and higher classes) in active regions (ARs) of the Sun by their microwave radiat…
Star-disk interactions in multi-band photometric monitoring of the classical T Tauri star GI Tau
Zhen Guo, Gregory J. Herczeg, Jessy Jose +16
The variability of young stellar objects is mostly driven by star-disk interactions. In long-term photometric monitoring of the accreting T Tauri star GI Tau, we detect extinction…
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…
Analysis of the non-LTE lithium abundance for a large sample of F-, G-, and K-giants and supergiants
L. S. Lyubimkov, D. V. Petrov
A five-dimensional interpolation method and corresponding computer program are developed for using published calculations to determine the non-LTE correction {Δ\}NLTE to the lithiu…