Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
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超微弱矮星系伽马射线和运动学观测对速度相关暗物质湮灭截面的约束
DOI：
10.1103/physrevd.97.063013
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发表时间：
2017-11
影响因子：
5
通讯作者：
Zhao Y
中科院分区：
文献类型：
--
作者：
Zhao Yi;Zhang Xinmin;Zhao Yi;Zhang Xinmin;Bi Xiao-Jun;Yin Peng-Fei;Bi Xiao-Jun;Zhang Xinmin;Zhao Y;Zhao Y
Searching for gamma rays from dwarf spheroidal galaxies (dSphs) is a promising approach to detect dark matter (DM) due to the high DM densities and low baryon components in dSphs. The Fermi-LAT observations from dSphs have set stringent constraints on the velocity independent annihilation cross section. However, the constraints from dSphs may change in velocity dependent annihilation scenarios because of the different velocity dispersions in galaxies. In this work, we study how to set constraints on the velocity dependent annihilation cross section from the combined Fermi-LAT observations of dSphs with the kinematic data. In order to calculate the gamma ray flux from the dSph, the correlation between the DM density profile and velocity dispersion at each position should be taken into account. We study such correlation and the relevant uncertainty from kinematic observations by performing a Jeans analysis. Using the observational results of three ultrafaint dSphs with large J-factors, including Willman 1, Reticulum II, and Triangulum II, we set constraints on the p-wave annihilation cross section in the Galaxy as an example.
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DOI：
10.1088/0004-637x/808/1/95
发表时间：
2015-04
期刊：
The Astrophysical Journal
影响因子：
--
作者：
J. Simon;A. Drlica-Wagner;Ting S. Li;B. Nord;M. Geha;K. Bechtol;E. Balbinot;E. Buckley-Geer
通讯作者：
J. Simon;A. Drlica-Wagner;Ting S. Li;B. Nord;M. Geha;K. Bechtol;E. Balbinot;E. Buckley-Geer
DOI：
10.1017/s174392130600812x
发表时间：
2005-08
期刊：
Proceedings of the International Astronomical Union
影响因子：
--
作者：
R. D. Stefano;R. Soria;F. Primini;A. Kong
通讯作者：
R. D. Stefano;R. Soria;F. Primini;A. Kong
影响因子：
6.4
作者：
P. Ciafaloni;D. Comelli;A. Riotto;F. Sala;A. Strumia;A. Urbano
通讯作者：
P. Ciafaloni;D. Comelli;A. Riotto;F. Sala;A. Strumia;A. Urbano
影响因子：
5
作者：
A. Geringer-Sameth;S. Koushiappas
通讯作者：
A. Geringer-Sameth;S. Koushiappas
DOI：
10.1088/0004-637x/747/2/121
发表时间：
2012-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
T. A. C. M. Ackermann;A. Albert;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzi
通讯作者：
T. A. C. M. Ackermann;A. Albert;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzi