کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1771499 1020771 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory
چکیده انگلیسی

Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a point-like flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the ‘hybrid’ data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 27, Issue 4, April 2007, Pages 244–253
نویسندگان
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