Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Yakunin, I. A."'
Autor:
Semenko, E., Kochukhov, O., Mikulášek, Z., Wade, G. A., Alecian, E., Bohlender, D., Das, B., Feliz, D. L., Janík, J., Kolař, J., Krtička, J., Kudryavtsev, D. O., Labadie-Bartz, J. M., Mkrtichian, D., Monin, D., Petit, V., Romanyuk, I. I., Shultz, M. E., Shulyak, D., Siverd, R. J., Tkachenko, A., Yakunin, I. A., Zejda, M., collaboration, the BinaMIcS
We report the results of a comprehensive study of the spectroscopic binary (SB2) system HD 34736 hosting two chemically peculiar (CP) late B-type stars. Using new and archival observational data, we characterise the system and its components, includi
Externí odkaz:
http://arxiv.org/abs/2411.05376
Study of the $\mu$ Cet Binary with Speckle Interferometric, Photometric and Spectroscopic Techniques
Autor:
Dyachenko, V. V., Yakunin, I. A., Bayazitov, R. M., Grigoriev, S. A., Ryabchikova, T. A., Pakhomov, Yu. V., Semenko, E. A., Beskakotov, A. S., Mitrofanova, A. A., Maksimov, A. F., Balega, Yu. Yu.
We present a refined speckle-interferometric orbit of a binary system $\mu$ Cet, with the main component studied based on the analysis of photometric and spectroscopic data, obtained at the SAO RAS 6-m telescope. The object was initially classified a
Externí odkaz:
http://arxiv.org/abs/2409.15063
Doppler confirmation of TESS planet candidate TOI1408.01: grazing transit and likely eccentric orbit
Autor:
Galazutdinov, G. A., Baluev, R. V., Valyavin, G., Aitov, V., Gadelshin, D., Valeev, A., Sendzikas, E., Sokov, E., Mitiani, G., Burlakova, T., Yakunin, I., Antonyuk, K. A., Vlasyuk, V., Romanyuk, I., Rzaev, A., Yushkin, M., Ivanova, A., Tavrov, A., Korablev, O.
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters 2023 September 5
We report an independent Doppler confirmation of the TESS planet candidate orbiting an F-type main sequence star TOI-1408 located 140 pc away. We present a set of radial velocities obtained with a high-resolution fiber-optic spectrograph FFOREST moun
Externí odkaz:
http://arxiv.org/abs/2309.03009
The paper presents the first results of the ongoing spectropolarimetric monitoring of magnetic fields of stars, whose chemically peculiar nature has been previously revealed with the 1-m SAO RAS telescope. We selected the sample candidates using the
Externí odkaz:
http://arxiv.org/abs/2305.04898
Autor:
Joshi, Santosh, Trust, Otto, Semenko, E., Williams, P. E., Lampens, P., De Cat, P., Vermeylen, L., Holdsworth, D. L., García, R. A., Mathur, S., Santos, A. R. G., Mkrtichian, D., Goswami, A., Cuntz, M., Yadav, A. P., Sarkar, M., Bhatt, B. C., Aliçavuş, F. Kahraman, Nhlapo, M. D., Lund, M. N., Goswami, P. P., Savanov, I., Jorissen, A., Jurua, E., Avvakumova, E., Dmitrienko, E. S., Chakradhari, N. K., Das, M. K., Chowdhury, S., Abedigamba, O. P., Yakunin, I., Letarte, B., Karinkuzhi, D.
We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals that the light variations in
Externí odkaz:
http://arxiv.org/abs/2110.14275
The paper presents magnetic field measurements for 15 chemically peculiar (CP) stars of subgroup~1b in the OrionOB1 association. We have found that the proportion of stars with strong magnetic fields among these 15 CP stars is almost twice as large a
Externí odkaz:
http://arxiv.org/abs/2104.02434
Publikováno v:
Astrophysical Bulletin, Volume 75, Issue 3, p.284-293 (2020) Astrophysical Bulletin Astrophysical Bulletin Astrophysical Bulletin
This work is a continuation of the studies of the ultrafast variability of line profiles in the spectra of early-type stars. Line profile variations (LPVs) in the spectrum a chemically peculiar A0Vp star $\alpha^2\,$CVn are investigated using the Jan
Externí odkaz:
http://arxiv.org/abs/2011.01312
Autor:
Mathys, G., Romanyuk, I. I., Hubrig, S., Kudryavtsev, D. O., Schöller, M., Semenko, E. A., Yakunin, I. A.
Publikováno v:
A&A 629, A39 (2019)
Context. One of the keys to understanding the origin of the Ap stars and their significance in the general context of stellar astrophysics is the consideration of the most extreme properties displayed by some of them. In that context, HD 965 is parti
Externí odkaz:
http://arxiv.org/abs/1907.10675
A detailed spectroscopic survey of chemically peculiar (CP) stars in the Orion OB1 association is the most comprehensive observational program in the field of stellar magnetism that has been carried out at SAO so far. As at the end of 2018, we have c
Externí odkaz:
http://arxiv.org/abs/1905.08950
Autor:
Mathys, G., Romanyuk, I. I., Hubrig, S., Kudryavtsev, D. O., Landstreet, J. D., Schöller, M., Semenko, E. A., Yakunin, I. A.
Publikováno v:
A&A 624, A32 (2019)
Context. The Ap stars that rotate extremely slowly, with periods of decades to centuries, represent one of the keys to the understanding of the processes leading to the differentiation of stellar rotation. Aims. We characterise the variations of the
Externí odkaz:
http://arxiv.org/abs/1902.05869