Photon axion oscillations and type Ia supernovae
Photon axion oscillations and type Ia supernovae
复制标题
光子轴子振荡和 Ia 型超新星
DOI：
10.1103/physrevd.66.047702
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发表时间：
2002
影响因子：
5
通讯作者：
A. Goobar
中科院分区：
文献类型：
--
作者：
E. Mortsell;L. Bergstrom;A. Goobar
我们计算了在星系间磁场和电子等离子体存在下光子-轴子振荡的概率，并研究了它们对Ia型超新星观测的影响。转换概率是用密度矩阵形式计算的，以蒙特卡洛方式通过模拟宇宙跟踪光路。我们发现，尽管这种效应是高度依赖于频率的，但人们需要分析高红移物体的相对较窄的光谱特征，以便区分振荡和宇宙常数的变暗效应，这与早先声称的宽带光度法足够的说法相反。
We compute the probability of photon-axion oscillations in the presence of both intergalactic magnetic fields and an electron plasma and investigate the effect on Type Ia supernovae observations. The conversion probability is calculated using a density matrix formalism by following light-paths through simulated universes in a Monte-Carlo fashion. We find, that even though the effect is highly frequency dependent, one needs to analyze relatively narrow spectral features of high redshift objects in order to discern between the dimming effect from oscillations and a cosmological constant, in contrast to earlier claims that broad-band photometry is sufficient.