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首页> 外文期刊>The Astrophysical journal >SEARCHING FOR FLUCTUATIONS IN THE INTERGALACTIC MEDIUM TEMPERATURE USING THE Lyα FOREST
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SEARCHING FOR FLUCTUATIONS IN THE INTERGALACTIC MEDIUM TEMPERATURE USING THE Lyα FOREST

机译:使用Lyα森林在星际中等温度下寻找波动

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摘要

We propose a statistical method to search for fluctuations in the temperature of the intergalactic medium using the Lyα forest. The power on small scales (~25 km s~(-1)) is used as a thermometer, and fluctuations of this power are constrained. The method is illustrated using Q1422 + 231. We see no evidence of temperature fluctuations. We show that in a model with two temperatures that occupy comparable fractions of the spectra, the ratio of small-scale powers is constrained to be smaller than 3.5 (corresponding to a factor of 2.5 in temperature). We show that approximately 10 quasars are needed to constrain temperature fluctuations of a factor of 1.7.
机译:我们提出一种统计方法,以使用Lyα森林搜索星系间介质温度的波动。小规模的功率(〜25 km s〜(-1))用作温度计,并且该功率的波动受到限制。使用Q1422 + 231说明了该方法。我们看不到温度波动的迹象。我们表明,在一个模型中,两个温度占据了光谱的可比部分,小功率的比率被限制为小于3.5(对应于温度的2.5倍)。我们表明,大约需要10个类星体才能将温度波动限制为1.7。

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