Zobrazeno 1 - 10
of 70
pro vyhledávání: '"L. L Chinarova"'
We study the variability of the nova-like cataclysmic variable TT Ari, on time-scales of between minutes and months. The observations in the filter R were obtained at the 40-cm telescope of the Chungbuk National University (Korea). TT Ari was in the
Externí odkaz:
http://arxiv.org/abs/0810.1489
Publikováno v:
Odessa Astronomical Publications, Vol 30, Iss 0, Pp 57-62 (2017)
The methods for determination of the characteristics of the extrema are discussed with an application to irregularly spaced data, which are characteristic for photometrical observations of variable stars. We introduce new special functions, which wer
Externí odkaz:
https://doaj.org/article/53a2223c137c4549819201ccafd0195d
Publikováno v:
Odessa Astronomical Publications, Vol 9, Iss 0, Pp 100-104 (2017)
The observations of R Aqr from the AFOEV database are analyzed. The corrected value of the period P = 387509 ±0.029d was determined from a 5-th order trigonometric polynomial fit with a corresponding initial epoch for the maximum To =244473376 ±0.9
Externí odkaz:
https://doaj.org/article/a689ba1288d844328c95d7d931f2d6b2
Autor:
I. L Andronov, L. L. Chinarova
Publikováno v:
Odessa Astronomical Publications, Vol 9, Iss 0, Pp 9-13 (2017)
The cycle length of the dwarf nova EM Cyg undergoes season-to-season changes which may be interpreted by changes of the accretion rate caused by a solar-type activity of the secondary star. The mean brightness of EM Cyg varies with a cycle of ≈ 300
Externí odkaz:
https://doaj.org/article/1275487b767c495293d4ba17cc74a563
Autor:
J. Tremko, I. L. Andronov, L. L. Chinarova, M. I. Kumsiashvili, R. Luthardt, G. Pajdosz, L. Patkos, S. Robiger, S. Zola
Publikováno v:
Odessa Astronomical Publications, Vol 7, Iss 1, Pp 132-135 (2017)
Results based on 16 nights in B, 3 in UBV and 1 in UBVRI are presented. Periodograms for detrended nightly runs showed significant peaks at different frequences from 28 to 103 c/d. Most prominent of them correspond to the best fit periods 23.7, 15.2,
Externí odkaz:
https://doaj.org/article/b6a518ff1eab49ba956ef99ca11925c0
Publikováno v:
Odessa Astronomical Publications, Vol 7, Iss 1, Pp 103-107 (2017)
One frequency sine approximations allowed to obtain the following best fit parameters: periods P = 389.23 ± 0.47d, 3779±73d, 958.7±1.2d mean brightness a = 9.23±0.02m, 9.73±0.01m, 13.26 ±0.07m. semi-amplitudes r = 0.92 ± 0.026m, 0.02 ± 0.007m
Externí odkaz:
https://doaj.org/article/698e7c070251470e85631a162149f31e
Autor:
I. L Andronov, K. Arai, L. L. Chinarova, N. I. Dorokhov, T. N. Dorokhova, A. Dumitrescu, D. Nogami, S. V. Kolesnikov, A. Lepardo, P. A. Mason, K. Matsumoto, G. Oprescu, G. Pajdosz, R. Passuelo, L. Patkos, D. S. Senio, G. Sostero, V. F. Suleimanov, J. Tremko, G. V. Zhukov, S. Zola
Publikováno v:
Odessa Astronomical Publications, Vol 10, Iss 0, Pp 10-14 (2017)
Results obtained during the international observational campaign ” Т Т Ari-94” are briefly discussed. During 258 hours, totally 51299 observations were obtained in 12 observatories. The moments of 68 individual maxima and 74 minima are tabulate
Externí odkaz:
https://doaj.org/article/823ef66593684429847a6acbe9b3fd73
Autor:
L. L Chinarova, I. L. Andronov
Publikováno v:
Odessa Astronomical Publications, Vol 13, Iss 0, Pp 116-176 (2017)
The characteristics of brightness variations of 173 semi-regular stars are tabulated: the moments and brightness of the extrema; the effective periods, amplitudes and significance obtained by using different methods: a) the periodogram analysis (harm
Externí odkaz:
https://doaj.org/article/4678e12d84234c15bf422c952ec7dd12
Autor:
I. L Andronov, V. Burwitz, K. Reinsch, H. Barwig, L. L. Chinarova, S. V. Kolesnikov, N. M. Shakhovskoy, V. Hambaryan, K. Beuermann, D. A. Yuhanov
Publikováno v:
Odessa Astronomical Publications, Vol 16, Iss 0, Pp 7-10 (2017)
In this paper, we present the results of a study of the variability of the prototype polar AM Her using one of the complementary mathematical methods. Results of modeling of the auto-correlation analysis of a 24117 second long Chandra observation are
Externí odkaz:
https://doaj.org/article/b39d8cbd78154af1a8ffc361e2284dd9
Autor:
L. L. Chinarova
Publikováno v:
Odessa Astronomical Publications, Vol 20, Iss 2, Pp 22-25 (2017)
Electronic textbook for members and supervisors of the Youth Academy of Sciences; schoolars and teachers; students of the first courses. Total volume of the printed version is 86pp. The textbook is devoted to 100-th Anniversary of Prof. V.P.Tsessevic
Externí odkaz:
https://doaj.org/article/8beb214cb2b84a8aa4ed103cc3562fe1