How cold is cold dark matter?: Small-scales constraints from the flux power spectrum of the high-redshift Lyman-α forest

被引：186

作者：

Viel, Matteo ^{[1
,2
]}

Becker, George D. ^{[3
]}

Bolton, James S. ^{[4
]}

Haehnelt, Martin G. ^{[5
]}

Rauch, Michael ^{[6
]}

Sargent, Wallace L. W. ^{[3
]}

机构：

[1] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy

[2] Natl Inst Nucl Phys, Ist Nazl Fis Nucl, I-34127 Trieste, Italy

[3] CALTECH, Palomar Observ, Pasadena, CA 91125 USA

[4] Max Planck Inst Astrophys, D-85741 Garching, Germany

[5] Inst Astron, Cambridge CB3 0HA, England

[6] Carnegie Observ, Pasadena, CA 91101 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.041304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 < z < 6.4. From the HIRES spectra, we obtain a lower limit of m(WDM)greater than or similar to 1.2 keV (2 sigma) if the WDM consists of early decoupled thermal relics and m(WDM)greater than or similar to 5.6 keV (2 sigma) for sterile neutrinos. Adding the Sloan Digital Sky Survey Lyman-alpha flux power spectrum, we get m(WDM)greater than or similar to 4 keV and m(WDM)greater than or similar to 28 keV (2 sigma) for thermal relics and sterile neutrinos. These results improve previous constraints by a factor of 2.

引用

页数：4

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