Peculiar velocity cosmology with type Ia supernovae
Abstract
Type Ia Supernovae have yet again the opportunity to revolutionize the field of cosmology as the new generation of surveys are acquiring thousands of nearby SNeIa opening a new era in cosmology: the direct measurement of the growth of structure parametrized by . This method is based on the SNeIa peculiar velocities derived from the residual to the Hubble law as direct tracers of the full gravitational potential caused by large scale structure. With this technique, we could probe not only the properties of dark energy, but also the laws of gravity. In this paper we present the analytical framework and forecasts. We show that ZTF and LSST will be able to reach 5\% precision on by 2027. Our analysis is not significantly sensitive to photo-typing, but known selection functions and spectroscopic redshifts are mandatory. We finally introduce an idea of a dedicated spectrograph that would get all the required information in addition to boost the efficiency to each SNeIa so that we could reach the 5\% precision within the first two years of LSST operation and the few percent level by the end of the survey.
Cite
@article{arxiv.2001.09095,
title = {Peculiar velocity cosmology with type Ia supernovae},
author = {R. Graziani and M. Rigault and N. Regnault and Ph. Gris and A. Möller and P. Antilogus and P. Astier and M. Betoule and S. Bongard and M. Briday and J. Cohen-Tanugi and Y. Copin and H. M. Courtois and D. Fouchez and E. Gangler and D. Guinet and A. J. Hawken and Y. -L. Kim and P. -F. Léget and J. Neveu and P. Ntelis and Ph. Rosnet and E. Nuss},
journal= {arXiv preprint arXiv:2001.09095},
year = {2020}
}
Comments
White paper CNRS/IN2P3 Prospectives 2020