本文關(guān)鍵詞：強磁場中相對論電子系集體的共振逆康普頓散射譜　出處：《天文學(xué)報》2011年01期 　論文類型：期刊論文

  更多相關(guān)文章： 輻射機制 非熱 方法 解析 伽瑪射線 普通

【摘要】：強磁場中相對論電子的共振逆康普頓散射(RICS)是產(chǎn)生伽瑪射線的有效機制.以前的工作曾論證,伽瑪暴(GRB)的早期伽瑪射線輻射可能主要由該機制產(chǎn)生.利用此輻射機制,伽瑪暴研究中的一些困惑有可能得到較好的解釋.例如,觀測統(tǒng)計給出的"Amati關(guān)系"的起源,兩段式(折斷式)冪律譜的形成,特別是其中"死線問題"的解決方案,還有偏振的存在等.這里將重點討論折斷冪律譜形成問題.基于單個電子的RICS譜功率公式,導(dǎo)出了強磁場中大量相對論電子穿過周邊低頻輻射場時產(chǎn)生的集體RICS輻射譜(RICS譜光度)的簡化解析公式,并將它應(yīng)用于中子星周邊幾種典型的低頻場(如黑體輻射場、冪律輻射場以及熱軔致輻射場),以便與實際觀測譜形比較.計算表明:在滿足匹配條件(即近似共振條件)下,RICS輻射效率很高,其譜形普遍為兩段式的冪律譜形式,與周邊低頻場性質(zhì)無關(guān).還論證RICS機制可能是伽瑪暴、軟伽瑪重復(fù)暴和伽瑪射線脈沖星在高能射線波段(硬X射線和伽瑪射線)的一個理想的高效輻射機制.
[Abstract]:The strong magnetic field in the relativistic electron resonant inverse Compton scattering (RICS) is an effective mechanism to produce gamma rays. Previous work has demonstrated that gamma ray bursts (GRB) early gamma ray radiation may be mainly produced by this mechanism. The radiation mechanism of GRBs, some puzzles in the study may get a better explanation. For example, the origin of observation statistics are given "Amati", two segment (broken) form a power-law spectrum, especially the solution "deadline" problem, and the presence of the polarization. It will focus on a broken power-law spectrum. The formation of single electron RICS power spectrum based on formula is derived a large number of relativistic electrons in strong magnetic field through the collective RICS radiation surrounding low frequency radiation field spectra (RICS spectra photometric) the simplified analytical formula, which can be applied to neutron stars in the low-frequency field surrounding several typical (such as blackbody radiation field, power The law of radiation field and thermal bremsstrahlung field), so that with the observed spectrum. The calculation results indicated that under the matching condition (i.e. approximate resonance condition), RICS radiation efficiency is very high, its spectrum is generally two segment power-law spectrum form, has nothing to do with the surrounding nature. Also the low-frequency field RICS mechanism may be gamma ray bursts, Gama repeated bursts and gamma ray pulsars in high-energy X-ray band (hard X ray and gamma ray) an ideal efficient radiation mechanism.
【作者單位】： 上海交通大學(xué)物理系粒子物理宇宙學(xué)研究所;南京大學(xué)天文系;西藏大學(xué)理學(xué)院物理系宇宙線研究所;
【基金】：國家自然科學(xué)基金(10703003和10778621) 高校博士點科研基金(20070248122) 國家重點基礎(chǔ)研究發(fā)展計劃(2009CB824800) 教育部科學(xué)技術(shù)研究重點項目(207114)資助
【分類號】：P172.3
【正文快照】： 1己卜食，，~J.‘二刀觀測到的伽瑪暴的早期伽瑪射線輻射具有一些獨特性質(zhì){‘一3}，用傳統(tǒng)的內(nèi)激波一同步輻射機制很難解釋.例如，伽瑪射線觀測譜普遍呈兩段式冪律譜形，對此目前沒有簡單可信的解釋叫;特別是存在一個伽瑪射線譜低能部分的譜指數(shù)問題，即所謂的“死線間題”.按

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 劉當(dāng)波,陳磊,尤峻漢,張雙南;變化磁場中相對論電子系集體的共振逆康普頓散射譜[J];天文學(xué)報;2005年03期

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