Zobrazeno 1 - 10
of 56
pro vyhledávání: '"B. F. Yudin"'
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 275-276 (2017)
The results of the photometric observations of V4334 Sgr and characteristics of its evolution after outburst are presented.
Externí odkaz:
https://doaj.org/article/ac74f0a151114db885e702bd0c341560
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 277-278 (2017)
The spectrophotometric and photometric observations of the classical symbiotic star YY Her both during its quiescent state and during a strong outburst in 1993 are presented.
Externí odkaz:
https://doaj.org/article/3b9df7100ff14a6e8b51bae0cd15e377
Autor:
V. P. Arkhipova, A. M. Tatarnikov, N. P. Ikonnikova, B. F. Yudin, G. V. Komissarova, V. F. Esipov
Publikováno v:
Astronomy Letters. 35:764-779
We present new results of our UBV photometry for HD 179821=V1427 Aql, an F supergiant with an infrared excess, from 2000 to 2008. The semiregular low-amplitude (ΔV = 0 . 05−0 . 20) photometric variability of the star with a cycle period from 130 t
Publikováno v:
Astronomical & Astrophysical Transactions. 24:447-454
We discuss the optical photometry of the classical symbiotic star BF Cyg obtained during the period 1978–2005 and analyse the eclipse of the active hot component in 1991.
Publikováno v:
Astronomy Reports. 49:232-241
We present the results of our IR photometric observations of the classical symbiotic star BF Cyg acquired in 1978–2003. The variability range in the J and K bands was ∼0.2m. A periodic component in the cool star’s brightness variations is clear
Autor:
B. F. Yudin
Publikováno v:
Astronomy Reports. 48:327-331
We present the results of a joint analysis of JHK interferometric and UBVJHKLM photometric observations of RCrB acquired in June 2001. The baseline for the IOTA interferometer was 21.18 m. During the observations, the star was in its bright state in
Publikováno v:
Astronomy Reports. 47:889-902
We present high-and low-resolution spectral observations of the symbiotic Mira variable V407 Cyg obtained in 1993–2002. Both emission and absorption spectra of the star are analyzed in detail. We present the basic spectral parameters for three stat
Publikováno v:
Astronomy Reports. 47:777-788
New results of UBV JHKLM photometry of the symbiotic Mira V407 Cyg performed in 1998–2002 are reported. In 2002, these observations were supplemented with RI observations and a search for rapid variability in the V band. The hot component of V407 C
Autor:
Dieter Schertl, Gerd Weigelt, Jean-Philippe Berger, B. F. Yudin, Karl-Heinz Hofmann, V. I. Shenavrin, John D. Monnier, Rafael Millan-Gabet, Michael K. Brewer, Marc G. Lacasse, Ettore Pedretti, Keiichi Ohnaka, Wesley A. Traub, F. P. Schloerb, Udo Beckmann, V. Malanushenko
Publikováno v:
Astronomy & Astrophysics. 408:553-558
We report the first long-baseline interferometry of the circumstellar dust environment of R CrB. The observations were carried out with the Infrared Optical Telescope Array (IOTA), using our new JHK’ beam combiner which enables us to record fringes
Publikováno v:
Astronomy Reports. 46:805-818
The results of long-term photometric observations of R CrB in the UBV JHKLM bands are presented. The temporal and color characteristics of the emission of the star itself and of its extended dust envelope are analyzed in detail. No stable harmonic ha