期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.151302
关键词
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资金
- German Ministry for Education and Research (BMBF)
- Max Planck Society
- German Research Foundation (DFG)
- French Ministry for Research
- Centre National de la Recherche Scientifique-Institut National de Physique Nucleaire et de Physique des Particules
- Astroparticle Interdisciplinary Programme of the Centre National de la Recherche Scientifique
- United Kingdom Science and Technology Facilities Council (STFC)
- Institute of Particle and Nuclear Physics of the Charles University
- Czech Science Foundation
- Polish Ministry of Science and Higher Education
- South African Department of Science and Technology
- National Research Foundation
- University of Namibia
- European Union [PIEF-GA-2012-332350]
- ESRC [ES/N013956/1] Funding Source: UKRI
- STFC [ST/H001972/1, ST/N000757/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001972/1, ST/N000757/1] Funding Source: researchfish
A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l = -1.5 degrees, b = 0 degrees and for a dark matter profile centered at this location) previously reported in Fermi-LAT data. This new analysis overlaps significantly in energy with previous Fermi-LAT and H.E.S.S. results. No significant excess associated with dark matter annihilations was found in the energy range of 100 GeV to 2 TeV and upper limits on the gamma-ray flux and the velocity weighted annihilation cross section are derived adopting an Einasto dark matter halo profile. Expected limits for present and future large statistics H.E.S.S. observations are also given.
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