利用SMA研究3C 273的长时标光变

发布时间：2018-01-09 15:13

  本文关键词：利用SMA研究3C 273的长时标光变　出处：《云南大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 活动星系核 耀变体 数据分析 3C 273 光变

【摘要】：本文首先介绍了活动星系核及其子类耀变体的基本性质、分类和光变特性。其次,我们处理了SMA(Submillimeter Array)干涉望远镜对耀变体3C273从2004年3月至2013年5月近十年观测时间内230 GHz和345 GHz两个波段的观测数据,利用功率谱法和自相关离散型相关函数法分析验证了两个波段观测期间内的光变周期,计算出230 GHz波段存在327.87天的光变周期,345GHz波段存在276.2天的光变周期。接下来我们用离散相关函数法对2009年5月至2013年5月准同时性观测期间内230 GHz波段和43 GHz射电波段以及100MeV能量值的伽马射线波段的光变曲线进行相关性分析,发现了230 GHz和43GHz两个射电波段间存在强相关性,得到了光变趋势满足“高频引导低频”的结论;我们也发现了230 GHz射电波段和100 MeV能量值的伽马射线波段间存在着强相关性,得到了伽马射线的光变趋势要领先射电波段的结论,这个结论进一步限制了高能伽马射线的辐射区位置。
[Abstract]:In this paper, we first introduce the basic properties, classification and light variation properties of active galactic nuclei and their subclasses. We dealt with SMA(Submillimeter Arrey.). The Interferometric Telescope's observations of 3C273 from March 2004 to May 2013 in the two bands of 230 GHz and 345 GHz have been carried out over a period of nearly 10 years from March 2004 to May 2013. The power spectrum method and the autocorrelation discrete correlation function method are used to verify the period of light variation in the two bands, and the period of 327.87 days in 230 GHz band is calculated. The wavelength of 345 GHz has a period of 276.2 days. Then we use the discrete correlation function method to study the period of quasi-simultaneous observation from May 2009 to May 2013. Correlation analysis was made between GHz band, 43 GHz radio band and 100 MeV gamma-ray band. The strong correlation between the two radio bands of 230 GHz and 43 GHz is found, and the conclusion that the trend of optical variation satisfies the "high frequency guided low frequency" is obtained. We also found a strong correlation between the radio band of 230 GHz and the gamma-ray band with the energy value of 100 MeV. It is concluded that the photovariation trend of the gamma ray is ahead of the radio band. This conclusion further limits the location of the radiation region of high energy gamma rays.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P157
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本文编号：1401896