Periodicity analysis of the radio light curve of the Seyfert galaxy III Zw 2

Autor:	H. Z. Li, T.F. Yi, W.W. Na, Y.Y. Bao, Y.K. Tang, H. Dai, L.Z. Lü, Guang-Zhong Xie, J.Y. Ren, L. E. Chen
Rok vydání:	2010
Předmět:	Physics Luminous infrared galaxy Radio galaxy Spectral density Astronomy Astronomy and Astrophysics Astrophysics Correlation function (astronomy) Disc galaxy Light curve Galaxy Intensity (physics) Space and Planetary Science Instrumentation
Zdroj:	New Astronomy. 15:254-259
ISSN:	1384-1076
DOI:	10.1016/j.newast.2009.08.001
Popis:	We have analyzed the radio light curves of the Seyfert galaxy III Zw 2 at 2:? and 37 GHz taken from the database of Metsahovi Radio Observatory, and found evidence of quasi-periodic activity. The light curves show great activity, with very complicated non-sinusoidal variations. Period of P(obs) = 5.14 +/- 0.19 yr was consistently identified by three methods: the Jurkevich method, the power spectrum intensity estimation method and the discrete correlation function method. The variability period of about 5.14 yr in III Zw 2 is caused most likely by the helical motion of the jet. (C) 2009 Elsevier B.V. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::68f3d937792a4ee4343bdf897ab0f47d https://doi.org/10.1016/j.newast.2009.08.001 Zobrazit plný text záznamu Full Text from ScienceDirect