A New Signal Model for Axion Cavity Searches from N -body Simulations
Abstract
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.
- Authors:
-
- Univ. of Washington, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1537192
- Grant/Contract Number:
- SC0011665
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 845; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics
Citation Formats
Lentz, Erik W., Quinn, Thomas R., Rosenberg, Leslie J., and Tremmel, Michael J. A New Signal Model for Axion Cavity Searches from N -body Simulations. United States: N. p., 2017.
Web. doi:10.3847/1538-4357/aa80dd.
Lentz, Erik W., Quinn, Thomas R., Rosenberg, Leslie J., & Tremmel, Michael J. A New Signal Model for Axion Cavity Searches from N -body Simulations. United States. https://doi.org/10.3847/1538-4357/aa80dd
Lentz, Erik W., Quinn, Thomas R., Rosenberg, Leslie J., and Tremmel, Michael J. Fri .
"A New Signal Model for Axion Cavity Searches from N -body Simulations". United States. https://doi.org/10.3847/1538-4357/aa80dd. https://www.osti.gov/servlets/purl/1537192.
@article{osti_1537192,
title = {A New Signal Model for Axion Cavity Searches from N -body Simulations},
author = {Lentz, Erik W. and Quinn, Thomas R. and Rosenberg, Leslie J. and Tremmel, Michael J.},
abstractNote = {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.},
doi = {10.3847/1538-4357/aa80dd},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 845,
place = {United States},
year = {Fri Aug 18 00:00:00 EDT 2017},
month = {Fri Aug 18 00:00:00 EDT 2017}
}
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