@article{7ba201ee16ba40319cd13c2ec499168e,
title = "Ultralight axions and the kinetic Sunyaev-Zel'dovich effect",
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 ?a=?axion/?DM 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 ?a?10-3 if 10-27 eV?ma?10-24 eV, or ?a?1 if ma?10-22 eV, within the fuzzy dark matter window. ",
author = "Farren, {Gerrit S.} and Daniel Grin and Jaffe, {Andrew H.} and Ren{\'e}e Hlo{\v Z}ek and Marsh, {David J.E.}",
note = "Funding Information: D. G. acknowledges support in part by NASA ATP Grant No. 17-ATP17-0162. G. S. F. acknowledges support through the Isaac Newton Studentship and the Helen Stone Scholarship at the University of Cambridge. D. G. and G. S. F. acknowledge support from the Provost{\textquoteright}s office at Haverford College. G. S. F. acknowledges support from the KINSC Summer Scholars Fund at Haverford College. G. S. F. thanks Imperial College for hospitality during the conduct of some of the research described here. A. H. J. acknowledges support from STFC in the United Kingdom. R. H. is a CIFAR Azrieli Global Scholar, Gravity & the Extreme Universe Program, 2019, and a 2020 Alfred P. Sloan Research Fellowship. R. H. is supported by Natural Sciences and Engineering Research Council of Canada and the Connaught Fund. The work of D. J. E. M. was supported by the Alexander von Humboldt Foundation and the German Federal Ministry of Education and Research. D. J. E. M. is supported by an Ernest Rutherford Fellowship from UK STFC. The authors acknowledge useful conversations with T. L. Smith, A. v. Engelen, R. Sheth, A. Kosowsky, F. Cyr-Racine, M. Dentler, A. Lague, B. Sherwin, and T. Baldauf. The authors thank Bruce Partridge for useful conversations and a careful reading of the manuscript. D. G. and G. S. F. are grateful to J. Cammisa for assistance with the fock computer cluster at Haverford College. The Dunlap Institute is funded through an endowment established by the David Dunlap family and the University of Toronto. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",
year = "2022",
month = mar,
day = "15",
doi = "10.1103/PhysRevD.105.063513",
language = "English",
volume = "105",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society (APS)",
number = "6",
}