New perspective on galaxy clustering as a cosmological probe: General relativistic effects
By Jaiyul Yoo, A. Fitzpatrick, Matias Zaldarriaga Harvard University, B. University, Institute for Advanced Study. 2009
273 citations recorded by the source corpus.
We present a general relativistic description of galaxy clustering in a Friedmann-Lemaitre-Robertson-Walker universe. The observed redshift and position of galaxies are affected by the matter fluctuations and the gravity waves between the source galaxies and the observer, and the volume element constructed by using the observables differs from the physical volume occupied by the observed galaxies. Therefore, the observed galaxy fluctuation field contains additional contributions arising from the distortion in observable quantities and these include tensor contributions as well as numerous scalar contributions. We generalize the linear bias approximation to relate the observed galaxy fluctuation field to the underlying matter distribution in a gauge-invariant way. Our full formalism is essential for the consistency of theoretical predictions. As our first application, we compute the angular auto correlation of large-scale structure and its cross correlation with CMB temperature anisotropies. We comment on the possibility of detecting primordial gravity waves using galaxy clustering and discuss further applications of our formalism.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/733dc97740825cb3634debab2b35b41f25e82804
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Citations in the corpus
- Probing primordial non-Gaussianity with SKA galaxy redshift surveys: a fully relativistic analysis (2014, background): “The remaining relativistic contributions are both local and integrated terms (Yoo et al. 2009; Yoo 2010; Bonvin & Durrer 2011; Challinor & Lewis 2011; Jeong et al. 2012; Bertacca et al. 2012), namely δobsg = (b+∆b)δcs− (1 + z) H (ni∂i) 2V −2 (1−Q)κ+δloc+δint.”
- Single-field consistency relations of large scale structure part II: resummation and redshift space (2013, background): “Of course our consistency relations are not directly observable, since one has to take into account all the Newtonian and relativistic effects which relate the correlation functions of the density contrast and the velocity with the actual measurement of the galaxy position and redshift (see for exam”
- Observational probes of cosmic acceleration (2012, background): “However, scale-dependence of bias at the 10-20% level can persist to quite low k, especially for luminous, highly biased galaxy populations (Yoo et al., 2009).”
- The CLASSgal code for relativistic cosmological large scale structure (2013, unknown): “[9–13].”