Search for dark matter signals with Fermi-LAT observation of globular clusters NGC 6388 and M 15
Search for dark matter signals with Fermi-LAT observation of globular clusters NGC 6388 and M 15
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通过球状星团 NGC 6388 和 M 15 的 Fermi-LAT 观测寻找暗物质信号
DOI:
10.1088/1475-7516/2012/04/030
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发表时间:
2011-12
影响因子:
6.4
通讯作者:
Mingzhe Li
中科院分区:
文献类型:
--
作者:
Lei Feng;Qiang Yuan;Peng-Fei Yin;Xiao-Jun Bi;Mingzhe Li
The globular clusters are probably good targets for dark matter (DM) searches in gamma-rays due to the possible adiabatic contraction of DM by baryons. In this work we analyse the three-year data collected by Fermi Large Area Telescope of globular clusters NGC 6388 and M 15 to search for possible DM signals. For NGC 6388 the detection of gamma-ray emission was reported by Fermi collaboration, which is consistent with the emission of a population of millisecond pulsars. The spectral shape of NGC 6388 is also shown to be consistent with a DM contribution if assuming the annihilation final state is b (b) over bar. No significant gamma-ray emission from M 15 is observed. We give the upper limits of DM contribution to gamma-ray emission in both NGC 6388 and M 15, for annihilation final states b (b) over bar, W+W-, mu(+)mu(-), tau(+)tau(-) and monochromatic line. The constraints are stronger than that derived from observation of dwarf galaxies by Fermi.
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影响因子:
6.4
作者:
Yuan, Qiang;Yue, Bin;Bi, Xiao-Jun;Chen, Xuelei;Zhang, Xinmin
通讯作者:
Zhang, Xinmin
影响因子:
5
作者:
A. Pinzke;C. Pfrommer;L. Bergstrom
通讯作者:
A. Pinzke;C. Pfrommer;L. Bergstrom
影响因子:
56.9
作者:
A. Abdo;M. Ackermann;M. Ajello;W. Atwood;M. Axelsson;L. Baldini;J. Ballet;G. Barbiellini;
通讯作者:
A. Abdo;M. Ackermann;M. Ajello;W. Atwood;M. Axelsson;L. Baldini;J. Ballet;G. Barbiellini;
影响因子:
5
作者:
Yuan, Qiang;Zhu, Shou-hua;Zhang, Juan;Zhang, Xinmin;Liu, Jia;Yin, Peng-fei;Bi, Xiao-jun
通讯作者:
Bi, Xiao-jun
DOI:
10.1088/0004-637x/729/2/90
发表时间:
2011-01
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Tam;A. Kong;C. Hui;K. Cheng;C. Li;T. Lu
通讯作者:
P. Tam;A. Kong;C. Hui;K. Cheng;C. Li;T. Lu