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A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids
Tsai, YLS; 袁强;Yuan, Q; Huang, XY
2013
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号3页码:18
摘要Observation of gamma-rays from dwarf galaxies is an effective way to search for particle dark matter. Using 4-year data of Fermi-LAT observations on a series of Milky Way satellites, we develop a general way to search for the signals from dark matter annihilation in such objects. Instead of giving prior information about the energy spectrum of dark matter annihilation, we bin the Fermi-LAT data into several energy bins and build a likelihood map in the "energy bin - flux" plane. The final likelihood of any spectrum can be easily derived through combining the likelihood of all the energy bins. It gives consistent result with that directly calculated using the Fermi Scientific Tool. This method is very efficient for the study of any specific dark matter models with gamma-rays. We use the new likelihood map with Fermi-LAT 4 year data to fit the parameter space in three representative dark matter models: i) toy dark matter model, ii) effective dark matter operators, and iii) supersymmetric neutralino dark matter.
关键词dark matter detectors dark matter theory gamma ray detectors gamma ray experiments
学科领域Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2013/03/018
收录类别SCI
WOS记录号WOS:000316989200019
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被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224384
专题粒子天体物理中心
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Tsai, YLS,袁强;Yuan, Q,Huang, XY. A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013(3):18.
APA Tsai, YLS,袁强;Yuan, Q,&Huang, XY.(2013).A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(3),18.
MLA Tsai, YLS,et al."A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .3(2013):18.
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