研究者詳細 - 家田　章正

論文 - 家田　章正

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Difference between earthward and tailward flows in their dependences on geomagnetic and IMF conditions 査読有り

A Ieda, T Mukai, S Machida, JH Shue, SI Ohtani, T Nagai, Y Saito

Frontiers in Magnetospheric Plasma Physics: Celebrating 10 Years of Geotail Operation 16 巻頁： 186 - 189 2005年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：ELSEVIER SCIENCE BV

Earthward and tailward perpendicular fast flows in the plasma sheet were studied and their differences in response to geomagnetic conditions and to interplanetary magnetic field (IMF) conditions are discussed. We first identified the plasma sheet from 3.5 years of Geotail plasma and magnetic filed observations between 8 and 32 R-E down the tail. We then studied occurrence rates of fast flows during geomagnetically quiet and active intervals as identified by Kp and ASY indices, and during northward and southward IMF intervals. As a result, both earthward and tailward flows were observed more often during active or southward IMF intervals than during quiet or northward IMF intervals, as expected. On the other hand, we found that there is a difference between earthward and tailward flows: Dependences on geomagnetic conditions are more evident in tailward flows than in earthward flows. We further discuss that tailward flows indicate the substorm expansion phase better than earthward flows do.

Web of Science

Difference in magnetotail variations between intense and weak substorms 査読有り

Miyashita Y., Y. Kamide, S. Machida, K. Liou, T. Mukai, Y. Saito, A. Ieda, C.-I. Meng, and G. K. Parks

J. Geophys. Res 109 巻頁： doi:10.1029/2004JA010588 2004年

Roles of the magnetic reconnection in the Earth's magnetotail during substorms: Geotail observations 招待有り査読有り

Machida, S., A. Ieda, and Y. Miyashita

Physics of Magnetic Reconnection in High-Temperature Plasmas, edited by M. Ugai, Research Signpost, Kerala, India 頁： 161-191 2004年

Difference between earthward and tailward flows in their dependences on geomagnetic and IMF conditions 査読有り

Ieda, A., T. Mukai, S. Machida, J.-H. Shue, S.-I. Ohtani, T. Nagai, and Y. Saito

COSPAR Colloquia Series 16 巻頁： 186-189 2004年

Quiet time magnetotail plasma flow: Coordinated Polar ultraviolet images and Geotail observations 査読有り

Ieda A, Shue JH, Liou K, Ohtani SI, Meng CI, Fairfield DH, Mukai T, Saito Y, Machida S, Nagai T, Parks GK

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 108 巻 ( A9 ) 頁： 10.1029/2002JA009739 2003年9月

*Quiet time magnetotail plasma flow: Coordinated Polar ultraviolet images and Geotail observations 査読有り

Ieda, A., J.-H. Shue, K. Liou, S.-I. Ohtani, C.-I. Meng, D.H. Fairfield, T. Mukai, Y. Saito, S. Machida, T. Nagai, and G.K. Parks

J. Geophys. Res. 108 巻頁： 10.1029/2002JA009739 2003年

Quantitative relationships between rlasma sheet fast flows and nightside auroral power 査読有り

J.-H. Shue, S. Ohtani, P.T. Newell, K. Liou, C.-I. Meng, A. Ieda, and T. Mukai

J. Geophys. Res 108 巻頁： 10.1029/2002JA009794 2003年

Geotail observations of magnetic flux ropes in the plasm a sheet, 査読有り

Slavin, J.A., R.P. Lepping, J. Gjerloev, D.H. Fairfield, M. H esse, C.J. Owen, M.B. Moldwin, T. Nagai, A. Ieda, and T. Mukai

J. Geophys. Res 108 巻頁： 10.1029/2002JA009557 2003年

Simultaneous observations of earthward flow burst and plasmoid ejection during magnetospheric substorms 査読有り

Slavin, J.A., D.H. Fairfield, R.P. Lepping, M. Hesse, A. Ieda, E. Tanskanen, N. Ostgaard, T. Mukai, T. Nagai, H.J. Singer, and P.R. Sutcliffe

J. Geophys. Res 107 巻頁： 10.1029/2000JA003501 2002年

Magnetospheric signature of an ionospheric traveling convection vortex event 査読有り

Moretto, T., M. Hesse, A. Yahnin, A. Ieda, D. Man, and J.F. Waternann

J. Geophys. Res 107 巻頁： 10.1029/2001JA000049 2002年

Plasmoid ejection and auroral brightenings 査読有り

A Ieda, DH Fairfield, T Mukai, Y Saito, S Kokubun, K Liou, CI Meng, GK Parks, MJ Brittnacher

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 106 巻 ( A3 ) 頁： 3845 - 3857 2001年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER GEOPHYSICAL UNION

Geotail plasma and magnetic field observations of 24 plasmoids between 21 and 29 R-E have been compared with Polar ultraviolet observations of auroral brightenings. Both single and multiple plasmoids almost always corresponded to brightenings, but the brightenings were sometimes weak and spatially limited and did not always grow to a global substorm. Even a case where a plasmoid event occurred with fast postplasmoid flow corresponded to a weak brightening but no substorm. Some brightenings did not correspond to plasmoids, but these brightenings were observed away from the longitude of Geotail, indicating that plasmoids have a small longitudinal extent in the near tail. The plasmoids were occasionally observed before the brightenings but more frequently were observed 0-2 min after the brightenings with the delays probably due to the transit time to the observation point. It seems likely that; formation of a near-Earth neutral line causes each brightening in the polar ionosphere. but these formations do not always lead to a full-fledged substorm. What additional circumstance causes development of a full, large-scale substorm remains an open question.

Web of Science

*Plasmoid ejection and auroral brightenings 査読有り

Ieda, A., D.H. Fairfield, T. Mukai, Y. Saito, S. Kokubun, K. Liou, C.-I. Meng, G.K. Parks, and M.J. Brittnacher

J. Geophys. Res. 106 巻頁： 3845-3857 2001年

Statistical visualization of Earth's magnetotail during substorms by means of multidimensional superposed epoch analysis with Geotail data 査読有り

Machida, S., A. Ieda, T. Mukai, Y. Saito, and A. Nishida

J. Geophys. Res. 105 巻頁： 25,291-25,303 2000年

GEOTAIL observations of flow velocity and north-south magnetic field variations in the near and mid-distant tail associated with substorm onsets 査読有り

Machida, S., Y. Miyashita, A. Ieda, A. Nishida, T. Mukai, Y. Saito, and S. Kokubun,

Geophys. Res. Lett 26 巻頁： 635-638 1999年

Statistical analysis of the plasmoid evolution with Geotail observations 査読有り

Ieda, A; Machida, S; Mukai, T; Saito, Y; Yamamoto, T; Nishida, A; Terasawa, T; Kokubun, S

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 103 巻 ( A3 ) 頁： 4453 - 4465 1998年3月

*Statistical analysis of the plasmoid evolution with Geotail observations 査読有り

Ieda, A., S. Machida, T. Mukai, Y. Saito, T. Yamamoto, A. Nishida, T. Terasawa, and S. Kokubun

J. Geophys. Res. 103 巻頁： 4453-4465 1998年

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