Measurement of interplanetary magnetic field in short period using the cosmic-ray Sun shadow measured by LHAASO

被引：0
|
作者：
Nan, Yuncheng [1 ,2 ]
Chen, Songzhan [2 ]
Feng, Cunfeng
机构：
[1] Shandong Univ, Inst Frontier & Interdisciplinary Sci, 72 Binhai Rd, Qingdao, Shandong, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19 Yi Yuquan Rd, Beijing, Peoples R China
来源：
37TH INTERNATIONAL COSMIC RAY CONFERENCE, ICRC2021 | 2022年
基金：
国家重点研发计划;
关键词：
PHASE; TIBET;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The interplanetary magnetic field (IMF) between the Sun and the Earth induces the displacement of the cosmic-ray Sun shadow from the optical position. Previously, the average IMF has been measured by the ARGO-YBJ and the Tibet-AS gamma experiments through several years of data. With the improvement of the sensitivity, the first pool of WCDA in LHAASO, which has been operated since April 2019, and has observed the Sun shadow with significance exceeds 70 standard deviation. Using the data collected by WCDA from July 26 to August 22, 2019, we measured the displacements of Sun shadow at the energy of 6.4TeV every two or three days. Combining with the simulation of Sun shadow, the IMF is measured and is comparable with the satellite observations. This is the first time to measure the IMF using Sun shadow in a short period, and the expectation for space weather forecast is discussed.
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页数：10
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