Galaxy bias and gauges at second order in general relativity
Galaxy bias and gauges at second order in general relativity
复制标题
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:
--
通讯作者:
D. Wands
中科院分区:
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
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.
影响因子:
5
作者:
C. Rampf ;A. Wiegand
通讯作者:
A. Wiegand