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Chinese Scientists figured out how messenger neutrinos converge together in the Milky Way

Written by:WangYuhui    Edited by:   WangYuhui  Resource:NortheasternUniversity    Update:  2018-05-20  


Recently, Professor Xin Zhang of the College of Sciences, Northeastern University, collaborated with Dr. Jue Zhang of the Center for High Energy Physics, Peking University, making important progresses in the research of the gravitational clustering effects of cosmic relic neutrinos in the Milky Way: They developed an important algorithm in the N-one-body simulation, i.e., the reweighting technique, based on which a single simulation can yield neutrino density profiles for different neutrino masses and phase space distributions. From this development, the issue concerning how the oldest neutrinos in the universe gravitationally clustered in the Milky Way could be well addressed. On 9 May of this year, this research was published in Nature Communications [Jue Zhang and Xin Zhang, Gravitational clustering of cosmic relic neutrinos in the Milky Way, Nature Communications 9 (2018) 1833]. From this study, one can learn how the neutrino messengers from the baby universe converge together in our galaxy, which is closely related to the issue whether our understanding of the universe could be pushed to its age of about one second.