کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1771011 1020718 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The likely cause of the EGRET GeV anomaly and its implications
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
The likely cause of the EGRET GeV anomaly and its implications
چکیده انگلیسی

Analysis of data from the EGRET γ-ray detector on the Compton Gamma Ray Observatory indicated an anomaly in the form of an excess diffuse galactic flux at GeV energies over that which was theoretically predicted. Various explanations for this anomaly have been put forth, including the invocation of supersymmetric dark matter annihilation. We reexamine these explanations here, including a new discussion of the possible systematic errors in the sensitivity determination of the EGRET detector. We conclude that the most likely explanation of the EGRET “GeV anomaly” was an error in the estimation of the EGRET sensitivity at energies above ∼1 GeV. We give reasons why such a situation could have occured. We find evidence from our new all-sky analysis which is inconsistent with the assumption that the anomaly can be a signal of supersymmetric dark matter annihilation. We also reconfirm the original results of the EGRET team on the extragalactic γ-ray background spectrum. There are important implications of our analysis for the upcoming gamma ray large area telescope (GLAST) mission.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 29, Issue 1, February 2008, Pages 25–29
نویسندگان
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