CTAO's Galactic Plane Survey could detect the brightest Milky Way dark matter sub-halo at 5-sigma for TeV-scale WIMPs annihilating to b-quarks with cross section about 3e-25 cm^3/s, roughly ten times the canonical thermal value.
A search for TeV gamma-ray emission from SNRs, pulsars and unidentified GeV sources in the Galactic plane in the longitude range between -2 deg and 85 deg
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abstract
Using the HEGRA system of imaging atmospheric Cherenkov telescopes, one quarter of the Galactic plane (-2 deg < l < 85 deg) was surveyed for TeV gamma-ray emission from point sources and moderately extended sources (diameter <= 0.8 deg). The region covered includes 86 known pulsars (PSR), 63 known supernova remnants (SNR) and nine GeV sources, representing a significant fraction of the known populations. No evidence for emission of TeV gamma radiation was detected, and upper limits range from 0.15 Crab units up to several Crab units, depending on the observation time and zenith angles covered. The ensemble sums over selected SNR and pulsar subsamples and over the GeV-sources yield no indication for emission from these potential sources. The upper limit for the SNR population is at the level of 6.7% of the Crab flux and for the pulsar ensemble at the level of 3.6% of the Crab flux.
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Detecting dark matter sub-halos in the Galactic plane with the Cherenkov Telescope Array Observatory
CTAO's Galactic Plane Survey could detect the brightest Milky Way dark matter sub-halo at 5-sigma for TeV-scale WIMPs annihilating to b-quarks with cross section about 3e-25 cm^3/s, roughly ten times the canonical thermal value.