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- W3099931135 abstract "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 {it 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 {it 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 $bbar{b}$. 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 $bbar{b}$, $W^+W^-$, $mu^+mu^-$, $tau^+tau^-$ and monochromatic line. The constraints are stronger than that derived from observation of dwarf galaxies by {it Fermi}." @default.
- W3099931135 created "2020-11-23" @default.
- W3099931135 creator A5031119366 @default.
- W3099931135 creator A5049961195 @default.
- W3099931135 creator A5060470951 @default.
- W3099931135 creator A5086517911 @default.
- W3099931135 creator A5089707820 @default.
- W3099931135 date "2012-04-23" @default.
- W3099931135 modified "2023-09-28" @default.
- W3099931135 title "Search for dark matter signals with<i>Fermi</i>-LAT observation of globular clusters NGC 6388 and M 15" @default.
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- W3099931135 doi "https://doi.org/10.1088/1475-7516/2012/04/030" @default.
- W3099931135 hasPublicationYear "2012" @default.
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