Gamma-ray burst polarization reduction induced by the Lorentz invariance violation
Gamma-ray burst polarization reduction induced by the Lorentz invariance violation
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洛伦兹不变性破坏引起的伽马射线爆发偏振减少
DOI：
10.1093/mnras/stw2007
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发表时间：
2016-09
影响因子：
4.8
通讯作者：
Chang Zhe
中科院分区：
文献类型：
--
作者：
Lin Hai-Nan;Li Xin;Chang Zhe
已经观察到一些伽马射线暴(GRBs)的瞬时发射中的光子是高度偏振的。高极化被一些作者用来对洛伦兹不变性破坏(LIV)给予严格的约束。如果洛伦兹不变性被打破，光子的偏振矢量在其传播过程中可能会旋转。偏振矢量的旋转角既取决于光子能量，又取决于光源的距离。认为如果观测到高极化，则最高能量光子的偏振矢量相对于最低能量光子的偏振矢量的相对旋转角(以α表示)不应大于pi/2。否则，净偏振将被严重抑制，因此不可能像实际观察到的那样高。在本文中，我们将对LiV效应在传输过程中引起的伽玛暴偏振演化进行详细的计算。结果表明，偏振度随着α的增大而迅速减小，在α近似pi处达到局部极小值，然后增大到α接近3pi/2，之后又减小到α接近2pi，以此类推，偏振度随α的准周期Ta近似pi而振荡，而振荡幅度逐渐减小到零。此外，我们还发现，当α接近pi/2时，可以守恒相当大的偏振度(超过初始偏振度的60%)。在较高和较宽的能带、较软的光子谱和较高的红移GRB中进行偏振观测，有利于严格限制LiV效应。
It has been observed that photons in the prompt emission of some gamma-ray bursts (GRBs) are highly polarized. The high polarization is used by some authors to give a strict constraint on the Lorentz invariance violation (LIV). If the Lorentz invariance is broken, the polarization vector of a photon may rotate during its propagation. The rotation angle of polarization vector depends on both the photon energy and the distance of source. It is believed that if high polarization is observed, then the relative rotation angle (denoted by alpha) of polarization vector of the highest energy photon with respect to that of the lowest energy photon should be no more than pi/2. Otherwise, the net polarization will be severely suppressed, thus could not be as high as what was actually observed. In this paper, we will give a detailed calculation on the evolution of GRB polarization arising from LIV effect duration the propagation. It is shown that the polarization degree rapidly decrease as alpha increases, and reaches a local minimum at alpha approximate to pi, then increases until alpha approximate to 3 pi/2, after that decreases again until alpha approximate to 2 pi, etc. The polarization degree as a function of alpha oscillates with a quasi-period T a approximate to pi, while the oscillating amplitude gradually decreases to zero. Moreover, we find that a considerable amount (more than 60 per cent of the initial polarization) of polarization degree can be conserved when alpha approximate to pi/2. The polarization observation in a higher and wider energy band, a softer photon spectrum, and a higher redshift GRB is favourable in order to tightly constrain LIV effect.
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影响因子：
4.8
作者：
Chang Zhe;Lin Hai-Nan
通讯作者：
Lin Hai-Nan
星载康普顿旋光仪POLAR的串扰和非均匀性校正方法
影响因子：
3.5
作者：
Xiao Hualin;Hajdas Vvujtek;Wu Bobing;Produit Nicolas;Bao Tianwei;Batsch Tadeusz;Cadoux Franck;Chai Junying;Dong Yongwei;Kong Minnan;Kong Siwei;Rybka Dominik K.;Leluc Catherine;Li Lu;Liu Jiangtao;Liu Xin;Marcinkowski Radoslaw;Paniccia Mercedes;Pohl Martin
通讯作者：
Pohl Martin
影响因子：
64.8
作者：
J. Greiner;S. Klose;K. Reinsch;H. Schmid;R. Sari;D. Hartmann;C. Kouveliotou;A. Rau;E. Palazzi-E.-P
通讯作者：
J. Greiner;S. Klose;K. Reinsch;H. Schmid;R. Sari;D. Hartmann;C. Kouveliotou;A. Rau;E. Palazzi-E.-P
影响因子：
3.5
作者：
J. Ellis;N. Mavromatos;D. Nanopoulos;A. Sakharov;E. Sarkisyan
通讯作者：
J. Ellis;N. Mavromatos;D. Nanopoulos;A. Sakharov;E. Sarkisyan
DOI：
10.1086/510676
发表时间：
2006-10
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
E. Kalemci;S. Boggs;C. Kouveliotou;M. Finger;M. Baring
通讯作者：
E. Kalemci;S. Boggs;C. Kouveliotou;M. Finger;M. Baring