Search for gamma-ray emission from dark matter annihilation in the large magellanic cloud with the fermi large area telescope

被引：45

作者：

Buckley, Matthew R. ^{[1
]}

Charles, Eric ^{[2
,3
]}

Gaskins, Jennifer M. ^{[4
,5
]}

Brooks, Alyson M. ^{[1
]}

Drlica-Wagner, Alex ^{[6
]}

Martin, Pierrick ^{[7
]}

Zhao, Geng ^{[2
,3
]}

机构：

[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[2] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA

[3] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[4] CALTECH, Pasadena, CA 91125 USA

[5] Univ Amsterdam, GRAPPA, NL-1098 XH Amsterdam, Netherlands

[6] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

[7] UPS CNRS, Inst Rech Astrophys & Planetol, UMR5277, F-31028 Toulouse 4, France

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 10期

关键词：

NEUTRALINO ANNIHILATION; GALACTIC-CENTER; STAR-FORMATION; CROSS-SECTION; GALAXIES; CONSTRAINTS; ORBIT; MILKY; CALIBRATION; KINEMATICS;

D O I：

10.1103/PhysRevD.91.102001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

At a distance of 50 kpc and with a dark matter mass of similar to 10(10) M-circle dot, the large magellanic cloud (LMC) is a natural target for indirect dark matter searches. We use five years of data from the Fermi Large Area Telescope (LAT) and updated models of the gamma-ray emission from standard astrophysical components to search for a dark matter annihilation signal from the LMC. We perform a rotation curve analysis to determine the dark matter distribution, setting a robust minimum on the amount of dark matter in the LMC, which we use to set conservative bounds on the annihilation cross section. The LMC emission is generally very well described by the standard astrophysical sources, with at most a 1-2 sigma excess identified near the kinematic center of the LMC once systematic uncertainties are taken into account. We place competitive bounds on the dark matter annihilation cross section as a function of dark matter particle mass and annihilation channel.

引用

页数：29

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