Gamma-ray image reconstruction of the Andromeda galaxy
نویسندگان
چکیده
Abstract We analyze about 12 years of Fermi -LAT data in the direction Andromeda galaxy (M31). robustly characterize its spectral and morphological properties against systematic uncertainties related to modeling Galactic diffuse emission. perform this work by adapting exploiting potential SkyFACT adaptive template fitting algorithm. reconstruct γ-ray image M31 a template-independent way, we show that flat spatial models are preferred data, indicating an extension emission 0.3 — 0.4° for bulge M31. This study also suggests second component, extending at least 1°, contributes observed total quantify mis-modeling foreground level 2.9%.
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ژورنال
عنوان ژورنال: Journal of physics
سال: 2021
ISSN: ['0022-3700', '1747-3721', '0368-3508', '1747-3713']
DOI: https://doi.org/10.1088/1742-6596/2156/1/012096