Local dark matter clumps and the positron excess

被引：17

作者：

Cumberbatch, Daniel ^{[1
]}

Silk, Joseph ^{[1
]}

机构：

[1] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 374卷 / 02期

关键词：

cosmic rays; dark matter;

D O I：

10.1111/j.1365-2966.2006.11123.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It has been proposed that the excess in cosmic ray positrons at approximately 8 GeV, observed on both flights of the High-Energy Antimatter Telescope (HEAT) balloon experiment, may be associated with the annihilation of dark matter within the Milky Way halo. In this paper, we demonstrate how the self-annihilation of neutralino dark matter within local substructure can account for this excess, and we estimate the annihilation cross-section for several benchmark minimal supersymmetric (MSSM) models. We also demonstrate the changes in the permitted parameter space as the effects of tidal disruption become increasingly severe.

引用

页码：455 / 465

页数：11

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