Zobrazeno 1 - 10
of 858
pro vyhledávání: '"A P Zharikov"'
Autor:
Karpova, A. V., Zharikov, S. V., Zyuzin, D. A., Kirichenko, A. Yu., Shibanov, Yu. A., Márquez, I. F.
Context. Spider pulsars are millisecond pulsars in tight binary systems, in which a low-mass companion star is heated and ablated by the pulsar wind. Their observations allow one to study stellar evolution with formation of millisecond pulsars and ph
Externí odkaz:
http://arxiv.org/abs/2411.16350
Deep neural network models have a complex architecture and are overparameterized. The number of parameters is more than the whole dataset, which is highly resource-consuming. This complicates their application and limits its usage on different device
Externí odkaz:
http://arxiv.org/abs/2408.06024
Autor:
Bobakov, A. V., Kirichenko, A. Yu., Zharikov, S. V., Karpova, A. V., Zyuzin, D. A., Shibanov, Yu. A., Mennickent, R. E., Garcia-Álvarez, D.
Context. Two millisecond pulsars, PSR J1513$-$2550 and PSR J2017$-$1614, with spin periods of about 2.1 and 2.3 ms were recently discovered in the radio and $\gamma$-rays and classified as black widow pulsars in tight binary stellar systems with orbi
Externí odkaz:
http://arxiv.org/abs/2407.17187
Autor:
Zyuzin, D. A., Kirichenko, A. Yu., Karpova, A. V., Shibanov, Yu. A., Zharikov, S. V., Gilfanov, M. R., Tórtola, C. Perez
An unidentified $\gamma$-ray source 4FGL J1838.2+3223 has been proposed as a pulsar candidate. We present optical time-series multi-band photometry of its likely optical companion obtained with the 2.1-m telescope of Observatorio Astron\'omico Nacion
Externí odkaz:
http://arxiv.org/abs/2311.09108
Autor:
Kirichenko, A. Yu., Zharikov, S. V., Karpova, A. V., Fonseca, E., Zyuzin, D. A., Shibanov, Yu. A., López, E. A., Gilfanov, M. R., Cabrera-Lavers, A., Geier, S., Dong, F. A., Good, D. C., McKee, J. W., Meyers, B. W., Stairs, I. H., McLaughlin, M. A., Swiggum, J. K.
PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and $\gamma$-rays. We performed new phase-resolved multi-band photometry of PSR J1641+8049 using the OSIRIS instrument at the Gran Telescopio Canarias. Th
Externí odkaz:
http://arxiv.org/abs/2311.08688
We report the first radial velocity spectroscopic study of the eclipsing period bouncer SDSS J105754.25+275947.5. Together with eclipse light curve modeling, we redetermined the system parameters and studied the accretion disk structure. We confirm t
Externí odkaz:
http://arxiv.org/abs/2310.00909
Autor:
Bobakov, A. V., Karpova, A. V., Zharikov, S. V., Kirichenko, A. Yu., Shibanov, Yu. A., Zyuzin, D. A.
We present the results of optical spectroscopy of stellar companions to three binary millisecond pulsars, PSRs J0621$+$2514, J2317$+$1439 and J2302$+$4442, obtained with the Gran Telescopio Canarias. The spectrum of the J0621$+$2514 companion shows a
Externí odkaz:
http://arxiv.org/abs/2307.02167
Autor:
Kára, Jan, Zharikov, Sergey, Wolf, Marek, Amantayeva, Ainash, Subebekova, Gulnur, Khokhlov, Serik, Agishev, Aldiyar, Merc, Jaroslav
Publikováno v:
The Astrophysical Journal, Volume 950, Number 1 (2023), 47
We present a new study of the Z~Cam-type eclipsing cataclysmic variable AY~Piscium with the aim of determining the fundamental parameters of the system and the structure of the accretion flow therein. We use time-resolved photometric observations sup
Externí odkaz:
http://arxiv.org/abs/2305.14158
Autor:
Yurii O. Zharikov, Aida N. Gadzhiakhmedova, Yana V. Kiseleva, Roman V. Maslennikov, Aliya M. Aliyeva, Tatyana S. Zharikova, Vladimir N. Nikolenko
Publikováno v:
Наука и инновации в медицине, Vol 9, Iss 3, Pp 164-168 (2024)
Aim – to identify a correlation between the somatotype of a patient with liver cirrhosis and changes in the composition of the intestinal microbiota. Material and methods. The study included 46 patients diagnosed with liver cirrhosis of various
Externí odkaz:
https://doaj.org/article/fa51b0a32c72470ba84528bc1b36119e
Autor:
Yu. O. Zharikov, M. S. Zharkova, A. N. Gadjiakhmedova, A. M. Aliyeva, V. N. Nikolenko, V. T. Ivashkin
Publikováno v:
Российский журнал гастроэнтерологии, гепатологии, колопроктологии, Vol 34, Iss 3, Pp 53-61 (2024)
Aim: to evaluate the relationship of body composition components with the development of ascites in patients with liver cirrhosis.Materials and methods. One hundred and ten patients (44 men and 66 women) with the established diagnosis of liver cirrho
Externí odkaz:
https://doaj.org/article/243ec7e620844fdd91b4871cb3ef08e7