本文關(guān)鍵詞：利用SMA研究3C 273的長時標(biāo)光變　出處：《云南大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 活動星系核 耀變體 數(shù)據(jù)分析 3C 273 光變

【摘要】：本文首先介紹了活動星系核及其子類耀變體的基本性質(zhì)、分類和光變特性。其次,我們處理了SMA(Submillimeter Array)干涉望遠(yuǎn)鏡對耀變體3C273從2004年3月至2013年5月近十年觀測時間內(nèi)230 GHz和345 GHz兩個波段的觀測數(shù)據(jù),利用功率譜法和自相關(guān)離散型相關(guān)函數(shù)法分析驗證了兩個波段觀測期間內(nèi)的光變周期,計算出230 GHz波段存在327.87天的光變周期,345GHz波段存在276.2天的光變周期。接下來我們用離散相關(guān)函數(shù)法對2009年5月至2013年5月準(zhǔn)同時性觀測期間內(nèi)230 GHz波段和43 GHz射電波段以及100MeV能量值的伽馬射線波段的光變曲線進(jìn)行相關(guān)性分析,發(fā)現(xiàn)了230 GHz和43GHz兩個射電波段間存在強(qiáng)相關(guān)性,得到了光變趨勢滿足“高頻引導(dǎo)低頻”的結(jié)論;我們也發(fā)現(xiàn)了230 GHz射電波段和100 MeV能量值的伽馬射線波段間存在著強(qiáng)相關(guān)性,得到了伽馬射線的光變趨勢要領(lǐng)先射電波段的結(jié)論,這個結(jié)論進(jìn)一步限制了高能伽馬射線的輻射區(qū)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.
【學(xué)位授予單位】：云南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P157
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本文編號：1401896