WAVELET ANALYSIS OF VARIABILITY OF THE RADIO SOURCE 3C120 IN CENTIMETER WAVELENGTH RANGE

Автор(и)

  • A. L. Sukharev Radio Astronomical Institute of National Academy Sciences of Ukraine, Observatory "URAN-4", Ukraine
  • M. F. Aller Radio astronomical observatory of Michigan University, Ann Arbor,USA, United States

DOI:

https://doi.org/10.18524/1810-4215.2014.27.83079

Ключові слова:

3C120, radio galaxy, flux variability.

Анотація

3C120 – radio galaxy with an active nucleus has been intensively studied for many years in a wide range of the electromagnetic spectrum. We used observational data for 1966-2010 years, obtained with the radio telescope at Michigan State University (UMRAO) at frequencies of 14.5, 8 and 4.8 GHz. To study the variability of the radio source, we used wavelet method for time series analysis. The main periods in three frequencies are ~4.5 years and 6-12 years (~0.7, 1.6 and 3.4 years for the short-periodic flux component). The delay between radio frequencies was calculated. The comparison between the change in periods of fluctuations of radio fluxes and dynamics of the jet was performed (image VLBI Mojave, 15.4 GHz). Based on the periods found, we conducted forecasting changes in the radio flux and compared the results with the observation data.

Посилання

Michel A.: 1988, ASP Conf. Ser., 100, 1423.

Lister et al.:2013, AJ, 146, 120.

AllerM.F. et al.: 2001, BAAS, 33, 1516.

Gaydyshev I. Data analysis and processing, St . Petersburg, 2001.

Voskoboynikov Y. Filtering of signals and images: Fourier and wavelet algorithms (with examples in Mathcad), Novosibirsk Architectural University, 2010.

Davidov A.V. Digital processing of signals: Thematic lectures, Yekaterinburg, 2007.

Smolentsev N. Wavelet-analysis in MATLAB. DMK-Press, 2010.

Astaf'eva N.M.: 1996, UFN, 166, № 11.

Rosenberg G.S. et al.Ecology Prediction, Tolyatti, 1994.

Ryabov M.I. et al.: 2012, Odessa Astron. Publ., 25/2, 132

Lister et al.:2009, AJ, 137, 3718.

Scargle J.: 1982, AJ, 263, 835.

Dibay E.A., Active nuclei and stellar cosmogony, Moscow University Press, 1987, p. 6-19.

Cowperthwaite P.S. et al.: 2012, arXiv:1205.3175v1.

Caproni A. et al.: 2004, Mon. Not. R. Astron. Soc., 349, 1218.

Marscher A.P.: 2008, ASP Conf. Ser., 386.

Meyer F. et al.: 2002, arXiv:astro-ph/0207573.

Hiroki Nagakura et al.: 2008, AJ, 689, 391.

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Опубліковано

2014-11-14

Номер

Том 27 № 2 (2014)

Розділ

Статті

Ліцензія

Авторське право (c) 2014 Odessa Astronomical Publications

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Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року