Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Yushkin, M. V."'
Publikováno v:
ISSN 1990-3413, Astrophysical Bulletin, 2023, Vol. 78, No. 4, pp. 613-621
The development of a corrector for low-frequency variations in the star image at the input of ESPriF, the echelle spectropolarimeter of the BTA primary focus, is reported. New technical solutions have made it possible to extend the operating frequenc
Externí odkaz:
http://arxiv.org/abs/2401.14874
Autor:
Klochkova, V. G., Miroshnichenko, A. S., Panchuk, V. E., Tavolzhanskaya, N. S., Yushkin, M. V.
The optical spectra of the B-supergiant LS III+52 24 (IRAS 22023+5249) obtained at the 6-meter telescope BTA with a resolution R$\ge$60000 in 2010-2021 revealed signs of wind variability and velocity stratification in the extended atmosphere. The H$\
Externí odkaz:
http://arxiv.org/abs/2205.03030
Over the past two decades the echelle spectrograph NES of the 6-m telescope was used to perform high resolution spectroscopy of far evolved stars spanning a wide range of initial masses. The studies cover a diversity of stars with high mass-loss rate
Externí odkaz:
http://arxiv.org/abs/2201.12024
Some evidences of wind variability and velocity stratification in the extended atmosphere has been found in the spectra of the supergiant V340 Ser (=IRAS 17279$-$1119) taken at the 6-m BTA telescope with a spectral resolution R$\ge$60000. The H$\alph
Externí odkaz:
http://arxiv.org/abs/2010.07535
For the first time, based on long-term spectral monitoring with high spectral resolution, the optical spectrum of the weak central star of the IR source RAFGL 5081 has been studied. The spectral type of this star is close to G5-8 II, and its effectiv
Externí odkaz:
http://arxiv.org/abs/1709.04173
We present the results of investigation of five stars, originally classified as dwarfs, belonging to Cyg OB2 association, their stellar and wind properties. Using both TLUSTY and CMFGEN codes we derived effective temperatures, surface gravities, chem
Externí odkaz:
http://arxiv.org/abs/1512.05416
Highly-resolution optical spectra of the optical component of the IR-source IRAS01005+7910 are used to determine the spectral type of its central star, B1.5$ \pm $0.3, identify the spectral features, and analyze their profile and radial velocity vari
Externí odkaz:
http://arxiv.org/abs/1410.7879
Akademický článek
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Aiming to explore weak spectral features of stellar and interstellar origin we used the NES echelle spectrograph of the 6-m telescope to obtain high-resolution spectra for 13 hot O3 - B4 stars in the Cyg OB2 association, including a high luminous sta
Externí odkaz:
http://arxiv.org/abs/1306.1087
Akademický článek
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