Solar magnetic field strength and the "Sun's Shadow"

Tibet ASγCollaboration

Solar magnetic field strength and the "Sun's Shadow"

Tibet ASγCollaboration

Research output: Contribution to journal › Conference article › peer-review

Abstract

The angular displacement of the center of the observed Sun's shadow from the center of the optical solar disc tells us the information of average solar magnetic field strength in the space between the Sun and the Earth. We analyze the displacement of the Sun's shadow observed in 5 ∼ 240 TeV cosmic-ray intensity with the Tibet-III air shower array during 10 years between 2000 and 2009, and compare with the MC simulations based on the coronal magnetic field model and Parker's spiral interplanetary magnetic field model. We find that the observed North-South displacement is significantly larger than the prediction of simulations. This result uniquely suggests the underestimation of the average field strength between the Sun and the Earth in our model. In this work, we will report the actual solar magnetic field strength evaluated from the observed Sun's shadow.

Original language	English
Journal	Proceedings of Science
Publication status	Published - 2017 Jan 1
Externally published	Yes
Event	35th International Cosmic Ray Conference, ICRC 2017 - Bexco, Busan, Korea, Republic of Duration: 2017 Jul 10 → 2017 Jul 20

ASJC Scopus subject areas

General

Cite this

@article{6a09207d3f734cae9d2b947057e5fa83,

title = "Solar magnetic field strength and the {"}Sun's Shadow{"}",

abstract = "The angular displacement of the center of the observed Sun's shadow from the center of the optical solar disc tells us the information of average solar magnetic field strength in the space between the Sun and the Earth. We analyze the displacement of the Sun's shadow observed in 5 ∼ 240 TeV cosmic-ray intensity with the Tibet-III air shower array during 10 years between 2000 and 2009, and compare with the MC simulations based on the coronal magnetic field model and Parker's spiral interplanetary magnetic field model. We find that the observed North-South displacement is significantly larger than the prediction of simulations. This result uniquely suggests the underestimation of the average field strength between the Sun and the Earth in our model. In this work, we will report the actual solar magnetic field strength evaluated from the observed Sun's shadow.",

author = "{Tibet ASγCollaboration} and M. Amenomori and Bi, {X. J.} and D. Chen and Chen, {T. L.} and Chen, {W. Y.} and Cui, {S. W.} and Danzengluobu and Ding, {L. K.} and Feng, {C. F.} and Zhaoyang Feng and Feng, {Z. Y.} and Gou, {Q. B.} and Guo, {Y. Q.} and He, {H. H.} and He, {Z. T.} and K. Hibino and N. Hotta and Haibing Hu and Hu, {H. B.} and J. Huang and Jia, {H. Y.} and L. Jiang and F. Kajino and K. Kasahara and Y. Katayose and C. Kato and K. Kawata and M. Kozai and Labaciren and Le, {G. M.} and Li, {A. F.} and Li, {H. J.} and Li, {W. J.} and C. Liu and Liu, {J. S.} and Liu, {M. Y.} and H. Lu and Meng, {X. R.} and T. Miyazaki and K. Mizutani and K. Munakata and T. Nakajima and Y. Nakamura and H. Nanjo and M. Nishizawa and T. Niwa and M. Ohnishi and I. Ohta and Shunsuke Ozawa and Shoji Torii",

year = "2017",

month = jan,

day = "1",

language = "English",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

note = "35th International Cosmic Ray Conference, ICRC 2017 ; Conference date: 10-07-2017 Through 20-07-2017",

}

TY - JOUR

T1 - Solar magnetic field strength and the "Sun's Shadow"

AU - Tibet ASγCollaboration

AU - Amenomori, M.

AU - Bi, X. J.

AU - Chen, D.

AU - Chen, T. L.

AU - Chen, W. Y.

AU - Cui, S. W.

AU - Danzengluobu,

AU - Ding, L. K.

AU - Feng, C. F.

AU - Feng, Zhaoyang

AU - Feng, Z. Y.

AU - Gou, Q. B.

AU - Guo, Y. Q.

AU - He, H. H.

AU - He, Z. T.

AU - Hibino, K.

AU - Hotta, N.

AU - Hu, Haibing

AU - Hu, H. B.

AU - Huang, J.

AU - Jia, H. Y.

AU - Jiang, L.

AU - Kajino, F.

AU - Kasahara, K.

AU - Katayose, Y.

AU - Kato, C.

AU - Kawata, K.

AU - Kozai, M.

AU - Labaciren,

AU - Le, G. M.

AU - Li, A. F.

AU - Li, H. J.

AU - Li, W. J.

AU - Liu, C.

AU - Liu, J. S.

AU - Liu, M. Y.

AU - Lu, H.

AU - Meng, X. R.

AU - Miyazaki, T.

AU - Mizutani, K.

AU - Munakata, K.

AU - Nakajima, T.

AU - Nakamura, Y.

AU - Nanjo, H.

AU - Nishizawa, M.

AU - Niwa, T.

AU - Ohnishi, M.

AU - Ohta, I.

AU - Ozawa, Shunsuke

AU - Torii, Shoji

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The angular displacement of the center of the observed Sun's shadow from the center of the optical solar disc tells us the information of average solar magnetic field strength in the space between the Sun and the Earth. We analyze the displacement of the Sun's shadow observed in 5 ∼ 240 TeV cosmic-ray intensity with the Tibet-III air shower array during 10 years between 2000 and 2009, and compare with the MC simulations based on the coronal magnetic field model and Parker's spiral interplanetary magnetic field model. We find that the observed North-South displacement is significantly larger than the prediction of simulations. This result uniquely suggests the underestimation of the average field strength between the Sun and the Earth in our model. In this work, we will report the actual solar magnetic field strength evaluated from the observed Sun's shadow.

AB - The angular displacement of the center of the observed Sun's shadow from the center of the optical solar disc tells us the information of average solar magnetic field strength in the space between the Sun and the Earth. We analyze the displacement of the Sun's shadow observed in 5 ∼ 240 TeV cosmic-ray intensity with the Tibet-III air shower array during 10 years between 2000 and 2009, and compare with the MC simulations based on the coronal magnetic field model and Parker's spiral interplanetary magnetic field model. We find that the observed North-South displacement is significantly larger than the prediction of simulations. This result uniquely suggests the underestimation of the average field strength between the Sun and the Earth in our model. In this work, we will report the actual solar magnetic field strength evaluated from the observed Sun's shadow.

UR - http://www.scopus.com/inward/record.url?scp=85046056003&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046056003&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85046056003

SN - 1824-8039

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 35th International Cosmic Ray Conference, ICRC 2017

Y2 - 10 July 2017 through 20 July 2017

ER -

Solar magnetic field strength and the "Sun's Shadow"

Abstract

ASJC Scopus subject areas

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