Pulsar timing signal from ultralight scalar dark matter

被引：177

作者：

Khmelnitsky, Andrei ^{[1
]}

Rubakov, Valery ^{[2
,3
]}

机构：

[1] Univ Munich, Arnold Sommerfeld Ctr Theoret Phys, D-80333 Munich, Germany

[2] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[3] Moscow MV Lomonosov State Univ, Fac Phys, Dept Particle Phys & Cosmol, Moscow 119991, Russia

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 02期

关键词：

dark matter theory; gravitational waves/experiments; particle physics - cosmology connection; COSMOLOGICAL MODEL; ANGULAR VARIATIONS; PERTURBATIONS;

D O I：

10.1088/1475-7516/2014/02/019

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An ultralight free scalar field with mass around 10(-23)-10(-22) eV is a viable dark mater candidate, which can help to resolve some of the issues of the cold dark matter on sub-galactic scales. We consider the gravitational field of the galactic halo composed out of such dark matter. The scalar field has oscillating in time pressure, which induces oscillations of gravitational potential with amplitude of the order of 10(-15) and frequency in the nanohertz range. This frequency is in the range of pulsar timing array observations. We estimate the magnitude of the pulse arrival time residuals induced by the oscillating gravitational potential. We find that for a range of dark matter masses, the scalar field dark matter signal is comparable to the stochastic gravitational wave signal and can be detected by the planned SKA pulsar timing array experiment.

引用

页数：8

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