Future cosmological sensitivity for hot dark matter axions

被引：27

作者：

Archidiacono, Maria ^{[1
]}

Basse, Tobias ^{[1
,2
]}

Hamann, Jan ^{[3
,4
]}

Hannestad, Steen ^{[1
]}

Raffelt, Georg ^{[5
]}

Wong, Yvonne Y. Y. ^{[2
]}

机构：

[1] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

[3] CERN, Dept Phys, Div Theory, CH-1211 Geneva 23, Switzerland

[4] Univ Sydney, Sydney Inst Astron, Sydney, NSW 2006, Australia

[5] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 05期

关键词：

redshift surveys; axions;

D O I：

10.1088/1475-7516/2015/05/50

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the potential of a future, large-volume photometric survey to constrain the axion mass m(a), in the hot dark matter limit. Future surveys such as EUCLID will have significantly more constraining power than current observations for hot dark matter. Nonetheless, the lowest accessible axion masses are limited by the fact that axions lighter than similar to 0.15 eV decouple before the QCD epoch, assumed here to occur at a temperature T-QCD similar to 170 MeV; this leaves an axion population of such low density that its late-time cosmological impact is negligible. For larger axion masses, m(a) greater than or similar to 0.15 eV, where axions remain in equilibrium until after the QCD phase transition, we find that a EUCLID-like survey combined with Planck CMB data can detect m(a), at very high significance. Our conclusions are robust against assumptions about prior knowledge of the neutrino mass. Given that the proposed TAX solar axion search is sensitive to m(a), less than or similar to 0.2 eV, the axion mass range probed by cosmology is nicely complementary.

引用

页数：18

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