研究者詳細 - 藤木　謙一

論文 - 藤木　謙一

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Two-Station Interplanetary Scintillation Measurements of Solar Wind Speed near the Sun Using the X-band Radio Signal of the Nozomi Spacecraft 査読有り

M. Tokumaru, S. Fujimaki, M. Higashiyama, A. Yokobe, T. Ohmi, K. Fujiki and M. Kojima

SOLAR PHYSICS 2011年8月

Solar Mass Ejection Imager (SMEI) 3-D reconstruction of density enhancements behind interplanetary shocks: In-situ comparison near Earth and at STEREO 査読有り

Jackson, B. V.; Hamilton, M. S.; Hick, P. P.; Buffington, A.; Bisi, M. M.; Clover, J. M.; Tokumaru, M.; Fujiki, K.

Journal of Atmospheric and Solar-Terrestrial Physics 73 巻 ( 11-12 ) 頁： 1317-1329 2011年7月

Three-dimensional reconstruction of heliospheric structure using iterative tomography: A review 査読有り

Jackson, B. V.; Hick, P. P.; Buffington, A.; Bisi, M. M.; Clover, J. M.; Tokumaru, M.; Kojima, M.; Fujiki, K.

Journal of Atmospheric and Solar-Terrestrial Physics 73 巻 ( 10 ) 頁： 1214-1227 2011年6月

Three-dimensional Reconstructions and Mass Determination of the 2008 June 2 LASCO Coronal Mass Ejection Using STELab Interplanetary Scintillation Observations 査読有り

Bisi, M. M.; Jackson, B. V.; Hick, P. P.; Buffington, A.; Clover, J. M.; Tokumaru, M.; Fujiki, K.

The Astrophysical Journal Letters 715 巻 ( 2 ) 頁： L104-L108 2010年6月

Solar cycle evolution of the solar wind speed distribution from 1985 to 2008 査読有り

Tokumaru, Munetoshi; Kojima, Masayoshi; Fujiki, Ken'ichi

Journal of Geophysical Research 115 巻 ( A4 ) 頁： CiteID A04102 2010年4月

Solar Wind Forecast by Using Interplanetary Scintillation Observations 査読有り

Fujiki, K., Ito, H, Tokumaru, M.

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings 1216 巻頁： 663-666 2010年3月

Is the Polar Region Different from the Quiet Region of the Sun? 査読有り

Ito, Hiroaki; Tsuneta, Saku; Shiota, Daikou; Tokumaru, Munetoshi; Fujiki, Ken'ichi

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings 1216 巻頁： 88-89 2010年3月

Large-Scale Heliospheric Structure during Solar-Minimum Conditions using a 3D Time-Dependent Reconstruction Solar-Wind Model and STELab IPS Observations 査読有り

Bisi, M. M.; Jackson, B. V.; Hick, P. P.; Clover, J. M.; Hamilton, S.; Tokumaru, M.; Fujiki, K.

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings 1216 巻頁： 355-358 2010年3月

3D Reconstruction of Density Enhancements Behind Interplanetary Shocks from Solar Mass Ejection Imager White-Light Observations 査読有り

Jackson, B. V.; Hick, P. P.; Buffington, A.; Bisi, M. M.; Clover, J. M.; Hamilton, M. S.; Tokumaru, M.; Fujiki, K.

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings 1216 巻頁： 659-662 2010年3月

Evolution of the anemone AR NOAA 10798 and the related geo-effective flares and CMEs 査読有り

Asai, Ayumi; Shibata, Kazunari; Ishii, Takako T.; Oka, Mitsuo; Kataoka, Ryuho; Fujiki, Ken'ichi; Gopalswamy, Nat

Journal of Geophysical Research 114 巻 ( A12 ) 頁： CiteID A00A21 2010年2月

Is the Polar Region Different from the Quiet Region of the Sun? 査読有り

Ito, Hiroaki; Tsuneta, Saku; Shiota, Daikou; Tokumaru, Munetoshi; Fujiki, Ken'ichi

The Astrophysical Journal 719 巻 ( 1 ) 頁： 131-142 2010年

From the Sun to the Earth: The 13 May 2005 Coronal Mass Ejection 査読有り

Bisi, M. M.; Breen, A. R.; Jackson, B. V.; Fallows, R. A.; Walsh, A. P.; Mikić, Z.; Riley, P.; Owen, C. J.; Gonzalez-Esparza, A.; Aguilar-Rodriguez, E.; Morgan, H.; Jensen, E. A.; Wood, A. G.; Owens, M. J.; Tokumaru, M.; Manoharan, P. K.; Chashei, I. V.; Giunta, A. S.; Linker, J. A.; Shishov, V. I.; Tyul'Bashev, S. A.; Agalya, G.; Glubokova, S. K.; Hamilton, M. S.; Fujiki, K.; Hick, P. P.; Clover, J. M.; Pintér, B.

Solar Physics 265 巻 ( 1-2 ) 頁： 49-127 2010年

Relation between loop-shaped interplanetary disturbances and the magnetic flux rope 査読有り

Tokumaru, M., M. Kojima, K. Fujiki, K. Munakata, T. Kuwabara, and K. Marubashi

Advances in Geoscience (World Scientific Publishing Co., USA) 3 巻頁： in press 2009年

Non-dipolar solar wind structure observed in the cycle 23/24 minimum 査読有り

Tokumaru, M., Kojima, M., Fujiki, K., Hayashi, K.

Geophysical Research Letters 36 巻 ( p ) 頁： CiteID L09101 2009年

Interplanetary scintillation observations of the solar wind for space weather modeling 査読有り

Tokumaru, M., M. Kojima, and K. Fujiki

Space Technology Japan 8 巻頁： in press 2009年

Origins and properties of the quasi-stationary slow solar wind 査読有り

Eselevich, M. V., Eselevich, V. G., Fujiki, K.

Astronomy Reports 52 巻 ( 7 ) 頁： 576-589 2008年

A solar neutron telescope in Tibet and its capability examined by the 1998 November 28th event 査読有り

Y. Murakia, H. Tsuchiya, K. Fujiki, S. Masuda, Y. Matsubara, H. Menjyo, T. Sako, K. Watanabe, M. Ohnishi, A. Shiomi, M. Takita, T. Yuda, Y. Katayose, N. Hotta, S. Ozawa, T. Sakurai, Y.H. Tan and J.L. Zhang

Astroparticle Physics 28 巻 ( 1 ) 頁： 119-131 2007年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

A new solar neutron telescope has been constructed at Yangbajing, Tibet (600 g/cm2) and has been successfully operated for 8 years. During this time several interesting events were observed in coincidence with large solar flares. In this paper the authors discuss a directional count rate enhancement 1998 November 28 as to whether it is related to solar phenomena or not. We use this event to evaluate the sensitivity of the solar neutron telescope and discuss the detection limit for solar neutrons and high energy solar protons of this detector.

*What coronal parameters determine solar wind speed? 査読有り

Kojima, M., M. Tokumaru, K. Fujiki, H. Itoh, T. Murakami, and K. Hakamada

New Solar Physics with Solar-B Mission", ASP Conference Series,eds K. Shibata, S. Nagata, and T. Sakurai 369 巻頁： 549-555 2007年

記述言語：英語

It is crucially important for modeling solar wind acceleration to find universal physical parameters which can determine velocities of all kinds of solar wind from various sources such as slow wind from a helmet streamer, slow wind from an equatorial small coronal hole, the fast wind from a polar coronal hole. One of the parameters is the coronal hole scale size. A large-scale polar coronal hole is a source of fast solar wind, and medium and slow speed streams originate in smaller coronal holes. Nolte et al. (1976) obtained a linear correlation between the solar wind speed and coronal hole scale size for equatorial coronal holes. Kojima et al. (2004) analyzed the dependence of the solar wind speed on the scale size of high latitude coronal holes and reported that the speed was independent of the scale size if it was larger than 5X1010 km2. Another property is a flux expansion rate (f), which has a good inverse relation with solar wind velocity (Wang and Sheeley, 1990), and the third parameter is the magnetic field (B) energy released by reconnection at the lower corona (Fisk et al., 1999).
We have studied physical conditions of coronal magnetic field which determine solar wind velocity using an interplanetary scintillation method which can observe the solar wind at all latitudinal ranges. From studies in the solar minimum phase we found that the ratio of two parameters of B and f has a considerably higher correlation with the solar wind velocity than an individual parameter of f and B. This work gives the crucially important constraints for the solar wind acceleration models.

IPS tomographic observations of 3D solar wind structure 査読有り

Kojima, M., M. Tokumaru, K. Fujiki, K. Hayashi, and B. V. Jackson

Astronomical and Astrophysical Transactions 26 巻頁： 467-476 2007年

The source and propagation of the interplanetary disturbance associated with the full-halo coronal mass ejection on 28 October 2003 査読有り

Tokumaru, M., M. Kojima, K. Fujiki, M. Yamashita, and B. V. Jackson

(10.1029/ 2006JA012043) 巻 2007年

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