Towards the use of asteroseismology to investigate the nature of dark matter

被引：29

作者：

Casanellas, Jordi ^{[1
]}

Lopes, Ilidio ^{[1
,2
]}

机构：

[1] Inst Super Tecn, Ctr Multidisciplinar Astrofis, P-1049001 Lisbon, Portugal

[2] Univ Evora, Dept Fis, Colegio Luis Antonio Verney, P-7002554 Evora, Portugal

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 410卷 / 01期

关键词：

asteroseismology; stars: fundamental parameters; stars: interiors; stars: low-mass; Galaxy: centre; dark matter; SOLAR-LIKE OSCILLATIONS; INTERACTING MASSIVE PARTICLES; STELLAR STRUCTURE; 1ST STARS; ANNIHILATION; EVOLUTION; HALOS; CAPTURE; CONTRACTION; CONSTRAINT;

D O I：

10.1111/j.1365-2966.2010.17463.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The annihilation of huge quantities of captured dark matter (DM) particles inside low-mass stars has been shown to change some of the stellar properties, such as the star's effective temperature or the way the energy is transported throughout the star. While in the classical picture, without DM, a star of 1 M-circle dot is expected to have a radiative interior during the main sequence, the same star evolving in a halo of DM with a density (chi) > 108 GeV cm-3 will develop a convective core in order to evacuate the energy from DM annihilation in a more efficient way. This convective core leaves a discontinuity in the density and sound-speed profiles that can be detected by the analysis of the stellar oscillations. In this paper we present an approach towards the use of asteroseismology to detect the signature produced by the presence of DM inside a star, and we propose a new methodology to infer the properties of a DM halo from the stellar oscillations (such as the product of the DM density and the DM particle-nucleon scattering cross-section).

引用

页码：535 / 540

页数：6

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