Constraints on WIMP annihilation for contracted dark matter in the inner Galaxy with the Fermi-LAT
Constraints on WIMP annihilation for contracted dark matter in the inner Galaxy with the Fermi-LAT
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费米-LAT 对内星系收缩暗物质 WIMP 湮灭的约束
DOI：
10.1088/1475-7516/2013/10/029
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发表时间：
2013
影响因子：
6.4
通讯作者：
C. Muñoz
中科院分区：
文献类型：
--
作者：
G. Gómez;M. Sánchez;Ji;M. Peiró;F. Prada;A. Morselli;A. Klypin;D. Cerdeño;Y. Mambrini;C. Muñoz
我们通过比较理论预测与费米-LAT从银河系中心周围区域观察到的伽马射线发射，推导出对通用暗物质候选者参数的约束。我们的分析是保守的，因为它只要求预期的暗物质信号不超过观测到的发射。在可能的情况下，重子的银河系中心的崩溃是伴随着暗物质的收缩得到的约束是强大的。特别是，我们发现，对于B b-棒和τ{sup +}τ{sup −}或W{sup +}W{sup −}暗物质湮灭通道，湮灭截面的上限意味着热截面被排除在弱相互作用大质量粒子（WIMP）质量分别小于约700和500 GeV。对于μ{sup +}μ{sup −}通道，逆康普顿散射的影响是重要的，根据银河磁场的模型，排除热截面是针对小于约150至400 GeV的WIMP质量。得到的暗物质粒子湮灭截面的上限比没有收缩时强两个数量级。在后一种情况下，我们的结果与Fermi-LAT合作报告的银河系晕分析的上限更相容，其中采用了相同的保守方法，而没有建模的天体物理背景。«少
We derive constraints on parameters of generic dark matter candidates by comparing theoretical predictions with the gamma-ray emission observed by the Fermi-LAT from the region around the Galactic Center. Our analysis is conservative since it simply requires that the expected dark matter signal does not exceed the observed emission. The constraints obtained in the likely case that the collapse of baryons to the Galactic Center is accompanied by the contraction of the dark matter are strong. In particular, we find that for b b-bar and τ{sup +}τ{sup −} or W{sup +}W{sup −} dark matter annihilation channels, the upper limits on the annihilation cross section imply that the thermal cross section is excluded for a Weakly Interacting Massive Particle (WIMP) mass smaller than about 700 and 500 GeV, respectively. For the μ{sup +}μ{sup −} channel, where the effect of the inverse Compton scattering is important, depending on models of the Galactic magnetic field the exclusion of the thermal cross-section is for a WIMP mass smaller than about 150 to 400 GeV. The upper limits on the annihilation cross section of dark matter particles obtained are two orders of magnitude stronger than without contraction. In the latter case our results are compatiblemore » with the upper limits from the Galactic halo analysis reported by the Fermi-LAT collaboration for the case in which the same conservative approach without modeling of the astrophysical background is employed.« less
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影响因子：
4.9
作者：
Atwood, W. B.;Abdo, A. A.;Ziegler, M.
通讯作者：
Ziegler, M.
DOI：
10.1111/j.1365-2966.2004.07586.x
发表时间：
2003-11
影响因子：
4.8
作者：
J. Navarro;E. Hayashi;C. Power;A. Jenkins;C. Frenk;S. White;V. Springel;J. Stadel;T. Q. U. O. Vict
通讯作者：
J. Navarro;E. Hayashi;C. Power;A. Jenkins;C. Frenk;S. White;V. Springel;J. Stadel;T. Q. U. O. Vict
漫射 Y 射线发射的费米-LAT 观测：对宇宙射线和星际介质的影响
影响因子：
4.9
作者：
Ackermann;M;et al
通讯作者：
et al
DOI：
10.1088/0004-637x/761/2/91
发表时间：
2010-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
G. Zaharijas;A. Cuoco;Zhaoyu Yang;J. Conrad;for the Fermi-LAT collaboration
通讯作者：
G. Zaharijas;A. Cuoco;Zhaoyu Yang;J. Conrad;for the Fermi-LAT collaboration