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Title: Partially acoustic dark matter cosmology and cosmological constraints

Abstract

The Observations of the cosmic microwave background (CMB) together with weak lensing measurements of the clustering of large scale cosmological structures and local measurements of the Hubble constant pose a challenge to the standard ΛCDM cosmological model. On one side CMB observations imply a Hubble constant that is lower than local measurements and an amplitude of the lensing signal that is higher than direct measurements from weak lensing surveys. We investigate a way of relieving these tensions by adding dark radiation tightly coupled to an acoustic part of the dark matter sector and compare it to massive neutrino solutions. While these models offer a way of separately relieving the Hubble and weak lensing tensions they are prevented from fully accommodating both at the same time since the CMB requires additional cold dark matter when adding acoustic dark matter or massive neutrinos to preserve the same sharpness of the acoustic peaks which counteracts the desired growth suppression.

Authors:
 [1];  [2];  [2];  [2]
  1. Univ. of Chicago, IL (United States); Leiden Univ. (Netherlands)
  2. Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1595673
Alternate Identifier(s):
OSTI ID: 1406399
Grant/Contract Number:  
SC0009924; FG02-13ER41958
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 10; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Raveri, Marco, Hu, Wayne, Hoffman, Timothy, and Wang, Lian-Tao. Partially acoustic dark matter cosmology and cosmological constraints. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.103501.
Raveri, Marco, Hu, Wayne, Hoffman, Timothy, & Wang, Lian-Tao. Partially acoustic dark matter cosmology and cosmological constraints. United States. doi:10.1103/PhysRevD.96.103501.
Raveri, Marco, Hu, Wayne, Hoffman, Timothy, and Wang, Lian-Tao. Wed . "Partially acoustic dark matter cosmology and cosmological constraints". United States. doi:10.1103/PhysRevD.96.103501. https://www.osti.gov/servlets/purl/1595673.
@article{osti_1595673,
title = {Partially acoustic dark matter cosmology and cosmological constraints},
author = {Raveri, Marco and Hu, Wayne and Hoffman, Timothy and Wang, Lian-Tao},
abstractNote = {The Observations of the cosmic microwave background (CMB) together with weak lensing measurements of the clustering of large scale cosmological structures and local measurements of the Hubble constant pose a challenge to the standard ΛCDM cosmological model. On one side CMB observations imply a Hubble constant that is lower than local measurements and an amplitude of the lensing signal that is higher than direct measurements from weak lensing surveys. We investigate a way of relieving these tensions by adding dark radiation tightly coupled to an acoustic part of the dark matter sector and compare it to massive neutrino solutions. While these models offer a way of separately relieving the Hubble and weak lensing tensions they are prevented from fully accommodating both at the same time since the CMB requires additional cold dark matter when adding acoustic dark matter or massive neutrinos to preserve the same sharpness of the acoustic peaks which counteracts the desired growth suppression.},
doi = {10.1103/PhysRevD.96.103501},
journal = {Physical Review D},
number = 10,
volume = 96,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 9 works
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