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초강력 레이저과학 연구단
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Laboratory Study on Disconnection Events in Comets

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Title
Laboratory Study on Disconnection Events in Comets
Author(s)
Yan-Fei Li; Yu-Tong Li; Wei-Min Wang; Da-Wei Yuan; Bao-Jun Zhu; Jia-Yong Zhong; Hui-Gang Wei; Fang Li; Bo Han; Kai Zhang; Xiao-Xing Pei; Zhe Zhang; Jia-Rui Zhao; Chang Liu; Guo-Qian Liao; Zhi-Heng Fang; Chen Wang; Xiao-Gang Wang; Youichi Sakawa; Yong-Joo Rhee; Xin Lu; Neng Hua; Bao-Qiang Zhu; Taichi Morita; Yasuhiro Kuramitsu; Xiu-Guang Huang; Si-Zu Fu; Jian-Qiang Zhu; Gang Zhao; Jie Zhang
Publication Date
2018-01
Journal
SCIENTIFIC REPORTS, v.8, no.1, pp.463 -
Publisher
NATURE PUBLISHING GROUP
Abstract
When comets interacting with solar wind, straight and narrow plasma tails will be often formed. The most remarkable phenomenon of the plasma tails is the disconnection event, in which a plasma tail is uprooted from the comet's head and moves away from the comet. In this paper, the interaction process between a comet and solar wind is simulated by using a laser-driven plasma cloud to hit a cylinder obstacle. A disconnected plasma tail is observed behind the obstacle by optical shadowgraphy and interferometry. Our particle-in-cell simulations show that the difference in thermal velocity between ions and electrons induces an electrostatic field behind the obstacle. This field can lead to the convergence of ions to the central region, resulting in a disconnected plasma tail. This electrostatic-field-induced model may be a possible explanation for the disconnection events of cometary tails. © 2017 The Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/4340
DOI
10.1038/s41598-017-18712-0
ISSN
2045-2322
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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