A NEW ANALYSIS OF THE MEDIUM-TIMESCALE PERIODICITY IN S5 0716+714
| Autor: | Dai H(戴宏), H Wu, Zhao-Hua Xie, Guang-Zhong Xie, Ding SX(丁世学), L.Z. Ma, Zhou SB(周曙白), L. Chen |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | International Journal of Modern Physics D. 13:659-668 |
| ISSN: | 1793-6594 0218-2718 |
| Popis: | In this paper, we have collected the available observation data of BL Lac S5 0716+714 in I-band from published literature during 1994 to 2000. The light curve shows S5 0716+714 is very active and very complicated non-sinusoidal variations. We studied its medium-timescale periodicity using the Jurkevich and power spectrum method to search for the possible medium-timescale periods and found that one possible medium-timescale periodic with a period of around 14±0.1 day is obtained for S5 0716+714. It is interesting to note that these results are in good agreement with the previous results by Impey et al. (2000) and Qian et al. (2002), and this work provides a new analysis and evidence of the medium-timescale periodicity in BL Lac S5 0716+714. The helical jet model seems to be more reasonable for explaining our results than other models. |
| Databáze: | OpenAIRE |
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