The dipole of the galaxy bispectrum
The dipole of the galaxy bispectrum
复制标题
星系双谱的偶极子
DOI:
10.1093/mnrasl/slz066
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Clarkson C
中科院分区:
文献类型:
--
作者:
Clarkson C
The bispectrum will play an important role in future galaxy surveys. On large scales it is a key probe for measuring primordial non-Gaussianity which can help differentiate between different inflationary models and other theories of the early universe. On these scales a variety of relativistic effects come into play once the galaxy number-count fluctuation is projected on to our past light-cone. We show for the first time that the leading relativistic correction from these distortions in the galaxy bispectrum generates a significant dipole, mainly from relativistic redshift space distortions. The amplitude of the dipole can be more than 10 per cent of the monopole even on equality scales. Such a dipole is absent in the Newtonian approximation to the redshift space bispectrum, so it offers a clear signature of relativistic effects on cosmological scales in large-scale structure.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Sheean Jolicoeur;Obinna Umeh;R. Maartens;C. Clarkson
通讯作者:
C. Clarkson
影响因子:
6.4
作者:
Obinna Umeh;Sheean Jolicoeur;R. Maartens;C. Clarkson
通讯作者:
C. Clarkson
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作者:
D. Bertacca
通讯作者:
D. Bertacca
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通讯作者:
C. Bonvin
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
A. Raccanelli;D. Bertacca;D. Jeong;M. Neyrinck;A. Szalay;J. University;Bonn;Penn State;Igc
通讯作者:
Igc