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A cool R Coronae Borealis star Z UMi
Tonu Kipper, Valentina Klochkova
The high resolution spectra of a R CrB type star Z UMi are analysed. The atmospheric parameters of Z UMi are estimated: Teff=5250+/-250K and log g=0.5+/-0.3. This places Z UMi amon…
The optical spectrum of R Coronae Borealis close to 2003 decline
Tonu Kipper, Valentina Klochkova
Two sets of high-resolution spectra of R CrB obtained during the 2003 light decline are described. The first set was obtained on the descending branch of the light curve when V ~12…
Analysis of polarized microwave emission of Flare-Productive Active Region 9415
V. M. Bogod, G. B. Gelfreikh, F. Ch. Drago +5
The results of the microwave observations of the Sun made with the RATAN-600 have shown the existence of many types of spectral peculiarities in polarized emission of active region…
Photometric study of radio galaxies in RATAN--600 "Cold" survey
O. V. Verkhodanov, Yu. N. Parijskij, N. S. Soboleva +4
About 100 steep spectrum radio sources from the RATAN--600 RC catalog were mapped by the VLA and identified with optical objects down to 24--25 in the R band using the 6 m…
Photometric study of fields of nearby pulsars with the 6m telescope
V. G. Kurt, V. N. Komarova, T. A. Fatkhullin +3
Fields of Geminga, PSR B0950+08, PSR J1908+0734 and PSR J0108-1431 have been observed within the program of optical investigation of nearby neutron stars carried out with the 6m te…
The dynamical evolution of the fragmented, bipolar dust shell around the carbon star IRC +10216: Rapid changes of a PPN-like structure?
R. Osterbart, Y. Balega, T. Bloecker +2
We present high-resolution J-, H-, and K-band observations and the first H-K color image of the carbon star IRC +10216. The images were reconstructed from 6m telescope speckle inte…