Ultralight axions and the kinetic Sunyaev-Zel'dovich effect
File(s)
Accepted version
Author(s)
Farren, Gerrit S
Grin, Daniel
Jaffe, Andrew H
Hlozek, Renee
Marsh, David JE
Type
Journal Article
Abstract
Measurements of secondary cosmic microwave background (CMB) anisotropies, such as the Sunyaev-Zel’dovich (SZ) effect, will enable new tests of neutrino and dark sector properties. The kinetic SZ (kSZ) effect is produced by cosmological flows, probing structure growth. Ultralight axions (ULAs) are a well-motivated dark-matter candidate. Here, the impact of ULA dark matter (with mass 10−27 to 10−23 eV) on kSZ observables is determined, applying new analytic expressions for pairwise cluster velocities and Ostriker-Vishniac signatures in structure-suppressing models. For the future CMB Stage 4 and ongoing Dark Energy Spectroscopic Instrument galaxy surveys, the kSZ effect (along with primary anisotropies) will probe ULA fractions 𝜂𝑎 =Ωaxion/ΩDM as low as ∼5% if 𝑚𝑎 ≃10−27 eV (at 95% C.L.), with sensitivity extending up to 𝑚𝑎 ≃10−25 eV. If reionization and the primary CMB can be adequately modeled, Ostriker-Vishniac measurements could probe values 𝜂𝑎 ≃10−3 if 10−27 eV ≲𝑚𝑎 ≲10−24 eV, or 𝜂𝑎 ≃1 if 𝑚𝑎 ≃10−22 eV, within the fuzzy dark matter window.
Date Issued
2022-03-10
Date Acceptance
2022-01-18
Citation
Physical Review D: Particles, Fields, Gravitation and Cosmology, 2022, 105 (6)
ISSN
1550-7998
Publisher
American Physical Society
Journal / Book Title
Physical Review D: Particles, Fields, Gravitation and Cosmology
Volume
105
Issue
6
Copyright Statement
© 2022 American Physical Society. Farren, Gerrit S., et al. "Ultralight axions and the kinetic Sunyaev-Zel’dovich effect." Physical Review D 105.6 (2022): 063513.
Identifier
http://arxiv.org/abs/2109.13268v3
Subjects
Astronomy & Astrophysics
CLUSTERS
CONSTRAINTS
COSMOLOGY
ELLIPSOIDAL COLLAPSE
FUZZY DARK-MATTER
GALAXY FORMATION
MASS FUNCTION
Physical Sciences
Physics
Physics, Particles & Fields
PLANCK
REIONIZATION
Science & Technology
SMALL-SCALE FLUCTUATIONS
Publication Status
Published
Article Number
063513
Date Publish Online
2022-03-10