articlePhysical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmologyAug 5, 2013GREEN OA

Warm dark matter as a solution to the small scale crisis: New constraints from high redshift Lyman- α forest data

MVMatteo VielGDGeorge D. BeckerJSJames S. BoltonMGMartin G. Haehnelt

Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · +2 more institutions

Indexed inarxivcrossref

Abstract

We present updated constraints on the free-streaming of warm dark matter (WDM) particles derived from an analysis of the Lyman-$\ensuremath{\alpha}$ flux power spectrum measured from high-resolution spectra of 25 $z>4$ quasars obtained with the Keck High Resolution Echelle Spectrometer and the Magellan Inamori Kyocera Echelle spectrograph. We utilize a new suite of high-resolution hydrodynamical simulations that explore WDM masses of 1, 2 and 4 keV (assuming the WDM consists of thermal relics), along with different physically motivated thermal histories. We carefully address different sources of systematic error that may affect our final results and perform an analysis of the Lyman-$\ensuremath{\alpha}$…

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Topics & keywords

Topics
Keywords
  • Physics
  • Redshift
  • Astrophysics
  • Dark matter
  • Flux (metallurgy)
  • Matter power spectrum
  • Warm dark matter
  • Quasar
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