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

Tibet ASγCollaboration

Research output: Contribution to journalConference article

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 languageEnglish
JournalProceedings of Science
Publication statusPublished - 2017 Jan 1
Externally publishedYes
Event35th International Cosmic Ray Conference, ICRC 2017 - Bexco, Busan, Korea, Republic of
Duration: 2017 Jul 102017 Jul 20

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solar magnetic field
field strength
sun
Tibet
cosmic ray showers
interplanetary magnetic fields
cosmic rays
simulation
predictions
magnetic fields

ASJC Scopus subject areas

  • General

Cite this

Solar magnetic field strength and the "Sun's Shadow". / Tibet ASγCollaboration.

In: Proceedings of Science, 01.01.2017.

Research output: Contribution to journalConference article

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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",
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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.

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M3 - Conference article

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

ER -