Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cutoff in the Lyman-$\alpha$ forest power spectrum: warm IGM or warm
  dark matter?   We re-analyse high redshift and high resolution Lyman-$\alpha$ forest spectra
considered in (Viel et al 2013), seeking to constrain the properties of warm
dark matter particles. Compared to this previous work, we consider a wider
range of thermal histories of the intergalactic medium. We find that both warm
and cold dark matter models can explain the cut-off observed in the flux power
spectra of high-resolution observations equally well. This implies, however,
very different thermal histories and underlying re-ionisation models. We
discuss how to remove this degeneracy.

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The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
1
The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: q-bio