The authors present a new, independent derivation of the second-order relativistic galaxy number count in a flat expanding universe, but they only validate it at linear order against previous work.
Higher order relativistic galaxy number counts: dominating terms
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abstract
We review the number counts to second order concentrating on the terms which dominate on sub horizon scales. We re-derive the result for these terms and compare it with the different versions found in the literature. We generalize our derivation to higher order terms, especially the third order number counts which are needed to compute the 1-loop contribution to the power spectrum.
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astro-ph.CO 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Galaxy number counts at second order: an independent approach
The authors present a new, independent derivation of the second-order relativistic galaxy number count in a flat expanding universe, but they only validate it at linear order against previous work.