本文選題：脈沖星 + PSR�。� 參考：《新疆大學》2011年碩士論文

【摘要】：本文介紹了作者在攻讀碩士學位期間的研究工作,包括脈沖星單脈沖搜尋技術和對脈沖星PSR J0034-0721單個脈沖的觀測研究。 本文第二章敘述了關于脈沖星觀測方法的研究。選擇一個適當的脈沖星觀測技術對觀測新的脈沖星或觀測已知的脈沖星是至關重要的。在這一章里主要講述了對脈沖星進行觀測和對觀測系統(tǒng)進行調節(jié)時必須考慮的某些重要因素。首先解釋了在觀測中影響射電脈沖強度,形狀和寬度的各種參量;然后提出了單脈沖搜索的步驟。 在本文第三章給出了利用南山站25米射電望遠鏡進行脈沖星PSR J0034-0721強脈沖觀測的研究內容。在2009年11月19日到2010年1月13日之間,運用南山25m射電望遠對脈沖星PSR J0034-0721進行了觀測,在4次觀測中一共收集了8小時的原始數據。利用單脈沖搜尋方法,從8小時的觀測數據中一共探測到了信噪比(S/N)大于5的353個強單個脈沖。探測到的353個強單個脈沖的信噪比從5到10.5,峰值流量密度超過平均脈沖輪廓的17倍到39倍,最強信號的峰值流量達到9.43Jy。探測到的強脈沖累積分布具有冪律分布,冪指數為α=4.4±0.5。這些探測到的強脈沖半高全寬(W50)從1.5 ms到13.1 ms,平均約為6.5 ms。在1.54 GHz,得到的平均脈沖輪廓只顯示了一個成分,探測到的強脈沖分別來自脈沖輻射窗口中的兩個相位。絕大數強脈沖集中分布在平均輪廓峰值相位附近的區(qū)域內,但探測到十幾個信噪比大于6的強脈沖分布在平均輪廓前邊沿相位處,離平均脈沖輪廓峰值大概是23毫秒到40毫秒。這可能表明脈沖星PSR J0034-0721的脈沖發(fā)射區(qū)可能有兩個。 在1.54 GHz觀測頻率上探測到的強脈沖寬度,輻射能量表明脈沖星PSR J0034-072上探測到的強脈沖可能是一種特殊的強脈沖,這些強脈沖有可能區(qū)別于這個脈沖星發(fā)射的正常脈沖和其他脈沖星發(fā)射的典型巨脈沖。
[Abstract]:This paper introduces the research work of the author during his master's degree, including pulsar monopulse search technology and the observation of pulsar PSR J0034-0721 single pulse.
The second chapter introduces the research of pulsar observation method. Choose a star observation technology pulse on new pulsar observation or observation known proper pulsar is essential. In this chapter mainly describes some important factors must be considered for observation and adjustment of the pulsar observation system when first explain the influence of radio pulse intensity in the measurement of various parameters, the width and shape; and then put forward the steps of single pulse search.
For the pulsar PSR J0034-0721 strong pulse research content observed in the third chapter of this paper gives the Nanshan station 25 meter radio telescope. From November 19, 2009 to January 13, 2010, using the 25m Radio Telescope in Nanshan were observed on the pulsar PSR J0034-0721, a collection of original data in the 4 8 hours of observation altogether. By using single pulse search method from the observation data, in a total of 8 hours to detect the signal-to-noise ratio (S/N) of 353 strong single pulse is greater than 5. The detected 353 strong single pulse signal-to-noise ratio from 5 to 10.5, the peak flow density exceeds the average pulse profile is 17 to 39 times, the peak flow of the strongest signal to detect 9.43Jy. strong pulse cumulative distribution has a power-law distribution, the exponent is a =4.4 + 0.5. the detected pulse FWHM (W50) from 1.5 ms to 13.1 MS, the average is about 6.5 Ms. at 1.54 GHz, the The average pulse profile shows only one component, the detected strong pulse two phase respectively from pulse radiation window. Most strong pulse concentrates in the vicinity of average peak phase profile in the region, but to detect ten SNR greater than 6 strong pulse distribution with the mean contour edge phase at the peak from the average pulse profile is about 23 milliseconds to 40 milliseconds. This may indicate that the pulse emitter pulsar PSR J0034-0721 may have two.
In 1.54 GHz observation frequency detected strong pulse width, radiation energy shows that the pulsar PSR J0034-072 detected the strong pulse may be a special strong pulse, the strong pulse may be distinguished from that of the normal pulsar pulse and other pulsar emission typical giant pulse.

【學位授予單位】：新疆大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：P145.6

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本文編號：1739327