How cold is cold dark matter? Small-scales constraints from the flux power spectrum of the high-redshift lyman-alpha forest.
نویسندگان
چکیده
We present constraints on the mass of warm dark matter (WDM) particles derived from the Lyman-alpha flux power spectrum of 55 high-resolution HIRES spectra at 2.0 or approximately 1.2 keV (2sigma) if the WDM consists of early decoupled thermal relics and m(WDM) > or approximately 5.6 keV (2sigma) for sterile neutrinos. Adding the Sloan Digital Sky Survey Lyman-alpha flux power spectrum, we get m(WDM) > or approximately 4 keV and m(WDM) > or approximately 28 keV (2sigma) for thermal relics and sterile neutrinos. These results improve previous constraints by a factor of 2.
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ورودعنوان ژورنال:
- Physical review letters
دوره 100 4 شماره
صفحات -
تاریخ انتشار 2008