Galaxy bias and gauges at second order in general relativity

Galaxy bias and gauges at second order in general relativity
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广义相对论中的星系偏差和二阶规范

DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
D. Wands
D. Wands
中科院分区:
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文献类型:
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作者:
D. Bertacca;N. Bartolo;M. Bruni;K. Koyama;R. Maartens;S. Matarrese;M. Sasaki;D. Wands

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本文讨论了在二阶相对论密度微扰分析中规范选择的问题。我们比较牛顿和广义相对论的方法。在最近的文献中的一些误解进行了讨论。我们表明,comoving-synchronous规范是唯一的规范在广义相对论,对应于拉格朗日框架,是完全适当的描述在二阶的物质过密度。随动同步规范是描述二阶拉格朗日偏差的最简单规范。
We discuss the question of gauge choice when analysing relativistic density perturbations at second order. We compare Newtonian and general relativistic approaches. Some misconceptions in the recent literature are addressed. We show that the comoving-synchronous gauge is the unique gauge in general relativity that corresponds to the Lagrangian frame and is entirely appropriate to describe the matter overdensity at second order. The comoving-synchronous gauge is the simplest gauge in which to describe Lagrangian bias at second order.
相对论拉格朗日位移场和张量扰动
DOI: 10.1103/physrevd.90.123503
发表时间: 2014
期刊: Physical Review D
影响因子: 5
作者:
C. Rampf ;A. Wiegand
通讯作者: A. Wiegand