The Odd-Parity Galaxy Bispectrum
Cosmology and Nongalactic Astrophysics
2020-07-22 v1 General Relativity and Quantum Cosmology
Abstract
The galaxy bispectrum contains a wealth of information about the early universe, gravity, as well as astrophysics such as galaxy bias. In this paper, we study the parity-odd part of the galaxy bispectrum which is hitherto unexplored. In the standard cosmological model, the odd-parity bispectrum is generated by galaxy velocities through redshift-space distortions. While small in the case of General Relativity coupled with smooth dark energy, the signal could be larger in modified gravity scenarios. Thus, apart from being a very useful consistency test of measurements of galaxy clustering, the odd bispectrum offers a novel avenue for searching for new physics.
Keywords
Cite
@article{arxiv.1906.05198,
title = {The Odd-Parity Galaxy Bispectrum},
author = {Donghui Jeong and Fabian Schmidt},
journal= {arXiv preprint arXiv:1906.05198},
year = {2020}
}
Comments
5 pages, 2 figures. Comments welcome