Constraints on the ultracompact minihalos using neutrino signals from the gravitino dark matter decay

Autor:	Zheng, Yun-Long, Yang, Yu-Peng, Li, Ming-Zhe, Zong, Hong-Shi
Rok vydání:	2014
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	RAA Vol.14 No.10,1215-1220,2014
Druh dokumentu:	Working Paper
DOI:	10.1088/1674-4527/14/10/001
Popis:	Ultracompact dark matter minihalos (UCMHs) would be formed during the earlier universe if there were large density perturbations. If the dark matter can decay into the standard model particles, such as neutrinos, these objects would become the potential astrophysical sources and could be detected by the related instruments, such as IceCube. In this paper, we investigate the neutrino signals from the nearby UCMHs due to the gravitino dark matter decay and compare these signals with the background neutrino flux which is mainly from the atmosphere to get the constraints on the abundance of UCMHs. Comment: 7 pages, 3 figures, Accepted by RAA (Research in Astronomy and Astrophysics). Comments welcome!!
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1404.0433 Zobrazit plný text záznamu View this record from Arxiv