Cosmological Number Counts in Einstein and Jordan frames
General Relativity and Quantum Cosmology
2019-10-09 v1 Cosmology and Nongalactic Astrophysics
Abstract
Even though we know that physical observations are frame independent, the frame dependence of cosmological perturbations is relatively subtle and has led to confusion in the past. In this paper we show that while the (unobservable) matter power spectrum is frame dependent, the observable number counts are not. We shall also determine how the frame dependence of the power spectrum depends on scale.
Cite
@article{arxiv.1907.03606,
title = {Cosmological Number Counts in Einstein and Jordan frames},
author = {Jérémie Francfort and Basundhara Ghosh and Ruth Durrer},
journal= {arXiv preprint arXiv:1907.03606},
year = {2019}
}
Comments
18 pages, 1 figure