Perturbative description of biased tracers using consistency relations of LSS

Tomohiro Fujita, Zvonimir Vlah

研究成果: Article査読

6 被引用数 (Scopus)

抄録

We develop a simple formalism of biased tracers that we dub Monkey bias. In this formalism, a biased tracer field is constructed directly in terms of the linear matter fluctuation field and the set of derivative operators acting on it. Such bias expansion is first organized based on the general structure of non-linear dynamical equations for the biased tracers. Further physical conditions, like the equivalence principle, are imposed on tree-level correlators utilising the consistency relations. We obtain the bias expansion up to the third-order in linear matter fluctuation in the generalized ΛCDM background, which reproduces the previous results in the limit of the EdS universe. This algorithmic construction of our bias operator basis is well suited for extensions towards higher-order bias fields. Moreover, this formalism reveals that biased tracer dynamics in generalized ΛCDM background is not entirely degenerate with the rest of bias parameters, thus opening a possibility of testing the background cosmology through the observations of biased tracers.

本文言語English
論文番号059
ジャーナルJournal of Cosmology and Astroparticle Physics
2020
10
DOI
出版ステータスPublished - 2020 10 30
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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