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Title: A New Signal Model for Axion Cavity Searches from N -body Simulations

Journal Article · · Astrophysical Journal
;  [1];
  1. Physics Department, University of Washington, Seattle, WA 98195-1580 (United States)

Signal estimates for direct axion dark matter (DM) searches have used the isothermal sphere halo model for the last several decades. While insightful, the isothermal model does not capture effects from a halo’s infall history nor the influence of baryonic matter, which has been shown to significantly influence a halo’s inner structure. The high resolution of cavity axion detectors can make use of modern cosmological structure-formation simulations, which begin from realistic initial conditions, incorporate a wide range of baryonic physics, and are capable of resolving detailed structure. This work uses a state-of-the-art cosmological N -body+Smoothed-Particle Hydrodynamics simulation to develop an improved signal model for axion cavity searches. Signal shapes from a class of galaxies encompassing the Milky Way are found to depart significantly from the isothermal sphere. A new signal model for axion detectors is proposed and projected sensitivity bounds on the Axion DM eXperiment (ADMX) data are presented.

OSTI ID:
22663232
Journal Information:
Astrophysical Journal, Vol. 845, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
Country of Publication:
United States
Language:
English

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Cited By (5)

Searching for dark photon dark matter in LIGO O1 data journal December 2019
Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment journal April 2018
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A Dark Matter Hurricane: Measuring the S1 Stream with Dark Matter Detectors text January 2018
Hunting Axion Dark Matter with Protoplanetary Disk Polarimetry text January 2018