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First constraints on fuzzy dark matter from Lyman-alpha forest data and hydrodynamical simulations

Irsic, Vid; Viel, Matteo; Haehnelt, Martin G.; Bolton, James S.; Becker, George D.

Authors

Vid Irsic

Matteo Viel

Martin G. Haehnelt

George D. Becker



Abstract

We present constraints on the masses of extremely light bosons dubbed fuzzy dark matter from Lyman- α forest data. Extremely light bosons with a De Broglie wavelength of ~ 1 kpc have been suggested as dark matter candidates that may resolve some of the current small scale problems of the cold dark matter model. For the first time we use hydrodynamical simulations to model the Lyman- α flux power spectrum in these models and compare with the observed flux power spectrum from two different data sets: the XQ-100 and HIRES/MIKE quasar spectra samples. After marginalization over nuisance and physical parameters and with conservative assumptions for the thermal history of the IGM that allow for jumps in the temperature of up to 5000 K, XQ-100 provides a lower limit of 7.1 x 10 -22 eV, HIRES/MIKE returns a stronger limit of 14.3 x 10 -22 eV, while the combination of both data sets results in a limit of 20 x 10 -22 eV (2σ C.L.). The limits for the analysis of the combined data sets increases to 37.5 x 10 -22 eV (2σ C.L.) when a smoother thermal history is assumed where the temperature of the IGM evolves as a power-law in redshift. Light boson masses in the range 1 - 10 x 10 -22 eV are ruled out at high significance by our analysis, casting strong doubts on suggestions of significant strophysical implications of FDM, in particular for solving the "small scale crisis" of cold dark matter models

Citation

Irsic, V., Viel, M., Haehnelt, M. G., Bolton, J. S., & Becker, G. D. (2017). First constraints on fuzzy dark matter from Lyman-alpha forest data and hydrodynamical simulations. Physical Review Letters, 119(3), https://doi.org/10.1103/PhysRevLett.119.031302

Journal Article Type Article
Acceptance Date Jun 20, 2017
Online Publication Date Jul 20, 2017
Publication Date Jul 20, 2017
Deposit Date Jul 12, 2017
Publicly Available Date Jul 20, 2017
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 119
Issue 3
Article Number 031302
DOI https://doi.org/10.1103/PhysRevLett.119.031302
Public URL http://eprints.nottingham.ac.uk/id/eprint/44069
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.031302
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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