کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9953789 | 1523844 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constraining dark matter lifetime with a deep gamma-ray survey of the Perseus galaxy cluster with MAGIC
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Clusters of galaxies are the largest known gravitationally bound structures in the Universe, with masses around 1015Â Mâ, most of it in the form of dark matter. The ground-based Imaging Atmospheric Cherenkov Telescope MAGIC made a deep survey of the Perseus cluster of galaxies using almost 400Â h of data recorded between 2009 and 2017. This is the deepest observational campaign so far on a cluster of galaxies in the very high energy range. We search for gamma-ray signals from dark matter particles in the mass range between 200Â GeV and 200Â TeV decaying into standard model pairs. We apply an analysis optimized for the spectral and morphological features expected from dark matter decays and find no evidence of decaying dark matter. From this, we conclude that dark matter particles have a decay lifetime longer than â¼1026Â s in all considered channels. Our results improve previous lower limits found by MAGIC and represent the strongest limits on decaying dark matter particles from ground-based gamma-ray instruments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Dark Universe - Volume 22, December 2018, Pages 38-47
Journal: Physics of the Dark Universe - Volume 22, December 2018, Pages 38-47
نویسندگان
MAGIC Collaboration MAGIC Collaboration, V.A. Acciari, S. Ansoldi, L.A. Antonelli, A. Arbet Engels, C. Arcaro, D. Baack, A. BabiÄ, B. Banerjee, P. Bangale, U. Barres de Almeida, J.A. Barrio, J. Becerra González, W. Bednarek, E. Bernardini, A. Berti,