Observations of cosmic-ray Sun’s shadow with LHAASO-WCDA

Issued Date

2024-09-27

Resource Type

Conference Paper

eISSN

18248039

Scopus ID

2-s2.0-85212305133

Journal Title

Proceedings of Science

Volume

444

Rights Holder(s)

SCOPUS

Bibliographic Citation

Proceedings of Science Vol.444 (2024)

Suggested Citation

Cui M.Y., Xia J., He J.Y., Shi G.L., Feng L., Yuan Q., Zhang Y., Cao Z., Aharonian F., An Q., Axikegu, Bai Y.X., Bao Y.W., Bastieri D., Bi X.J., Bi Y.J., Cai J.T., Cao Q., Cao W.Y., Cao Z., Chang J., Chang J.F., Chen A.M., Chen E.S., Chen L., Chen L., Chen L., Chen M.J., Chen M.L., Chen Q.H., Chen S.H., Chen S.Z., Chen T.L., Chen Y., Cheng N., Cheng Y.D., Cui M.Y., Cui S.W., Cui X.H., Cui Y.D., Dai B.Z., Dai H.L., Dai Z.G., Danzengluobu, della Volpe D., Dong X.Q., Duan K.K., Fan J.H., Fan Y.Z., Fang J., Fang K., Feng C.F., Feng L., Feng S.H., Feng X.T., Feng Y.L., Gabici S., Gao B., Gao C.D., Gao L.Q., Gao Q., Gao W., Gao W.K., Ge M.M., Geng L.S., Giacinti G., Gong G.H., Gou Q.B., Gu M.H., Guo F.L., Guo X.L., Guo Y.Q., Guo Y.Y., Han Y.A., He H.H., He H.N., He J.Y., He X.B., He Y., Heller M., Hor Y.K., Hou B.W., Hou C., Hou X., Hu H.B., Hu Q., Hu S.C., Huang D.H., Huang T.Q., Huang W.J., Huang X.T., Huang X.Y., Huang Y., Huang Z.C., Ji X.L., Jia H.Y., Jia K., Jiang K., Jiang X.W., Jiang Z.J. Observations of cosmic-ray Sun’s shadow with LHAASO-WCDA. Proceedings of Science Vol.444 (2024). Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/102518

Title

Observations of cosmic-ray Sun’s shadow with LHAASO-WCDA

Author(s)

Cui M.Y.
 Xia J.
 He J.Y.
 Shi G.L.
 Feng L.
 Yuan Q.
 Zhang Y.
 Cao Z.
 Aharonian F.
 An Q.
 Axikegu
 Bai Y.X.
 Bao Y.W.
 Bastieri D.
 Bi X.J.
 Bi Y.J.
 Cai J.T.
 Cao Q.
 Cao W.Y.
 Cao Z.
 Chang J.
 Chang J.F.
 Chen A.M.
 Chen E.S.
 Chen L.
 Chen L.
 Chen L.
 Chen M.J.
 Chen M.L.
 Chen Q.H.
 Chen S.H.
 Chen S.Z.
 Chen T.L.
 Chen Y.
 Cheng N.
 Cheng Y.D.
 Cui M.Y.
 Cui S.W.
 Cui X.H.
 Cui Y.D.
 Dai B.Z.
 Dai H.L.
 Dai Z.G.
 Danzengluobu
 della Volpe D.
 Dong X.Q.
 Duan K.K.
 Fan J.H.
 Fan Y.Z.
 Fang J.
 Fang K.
 Feng C.F.
 Feng L.
 Feng S.H.
 Feng X.T.
 Feng Y.L.
 Gabici S.
 Gao B.
 Gao C.D.
 Gao L.Q.
 Gao Q.
 Gao W.
 Gao W.K.
 Ge M.M.
 Geng L.S.
 Giacinti G.
 Gong G.H.
 Gou Q.B.
 Gu M.H.
 Guo F.L.
 Guo X.L.
 Guo Y.Q.
 Guo Y.Y.
 Han Y.A.
 He H.H.
 He H.N.
 He J.Y.
 He X.B.
 He Y.
 Heller M.
 Hor Y.K.
 Hou B.W.
 Hou C.
 Hou X.
 Hu H.B.
 Hu Q.
 Hu S.C.
 Huang D.H.
 Huang T.Q.
 Huang W.J.
 Huang X.T.
 Huang X.Y.
 Huang Y.
 Huang Z.C.
 Ji X.L.
 Jia H.Y.
 Jia K.
 Jiang K.
 Jiang X.W.
 Jiang Z.J.

Author's Affiliation

State Key Laboratory of Particle Detection & Electronics
 Université Paris Cité
 Yunnan Observatories
 Nanjing University
 Shanghai Astronomical Observatory Chinese Academy of Sciences
 Shandong University
 Yunnan University
 Institute of High Energy Physics, Chinese Academy of Sciences
 University of Chinese Academy of Sciences
 Guangzhou University
 Tsinghua University
 Shanghai Jiao Tong University
 Sun Yat-Sen University
 University of Science and Technology of China
 Zhengzhou University
 Institiúid Ard-Lénn Bhaile Átha Cliath
 National Astronomical Observatories Chinese Academy of Sciences
 Max-Planck-Institut für Kernphysik
 Southwest Jiaotong University
 Purple Mountain Observatory Chinese Academy of Sciences
 Université de Genève
 Hebei Normal University
 Tibet University
 School of Physics
 TIANFU Cosmic Ray Research Center

Corresponding Author(s)

Cui M.Y.

Other Contributor(s)

Mahidol University

Abstract

During the propagation of cosmic rays (CRs) in the solar system, they are blocked by the Sun and deflected by the magnetic field, resulting in a shadow on the celestial map. As CRs travel from the vicinity of the Sun to the Earth, they encounter deflection from the coronal magnetic field (CMF), the interplanetary magnetic field (IMF), and finally the geomagnetic field (GMF). The extent of deflection is determined by the magnetic field’s intensity, direction, and energy of the CRs. Variations in the magnetic field cause corresponding changes in the position and size of the Sun’s shadow. By observing the Sun’s shadow of CRs, we can investigate the magnetic fields between the Sun and the Earth, complementing other measurements on these magnetic fields. Furthermore, it serves as a means to validate magnetic field models. The Large High Altitude Air Shower Observatory (LHAASO) is a new generation cosmic-ray and gamma-ray experiment in Daocheng, western China. With a vast Water Cherenkov Detector Array (WCDA) spanning 78,000 m2, LHAASO can successfully observe the significant Sun’s shadow within just a few days. Our study uses the WCDA to measure the Sun’s shadow effect caused by CRs over multiple Carrington rotation periods. Subsequently, we compare these results with simulations based on different magnetic field models.

Keyword(s)

Multidisciplinary

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/102518

Collections

Scopus 2024