Papers - IWAI Kazumasa
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Automatic Detection of Type II Solar Radio Burst by Using 1-D Convolution Neutral Network Reviewed
Cho, Kyung-Suk, Kim, Junyoung, Kim, Rok-Soon, Park, Eunsu, Kubo, Yûki, Iwai, Kazumasa
Journal of The Korean Astronomical Society Vol. 56 ( 2 ) page: 213 - 224 2023.12
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Munetoshi Tokumaru, Miho Nagai, Ken’ichi Fujiki, Kazumasa Iwai
Solar Physics Vol. 298 ( 11 ) 2023.11
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Bernard V. Jackson, Munetoshi Tokumaru, Kazumasa Iwai, Matthew T. Bracamontes, Andrew Buffington, Ken’ichi Fujiki, Go Murakami, Daniel Heyner, Beatriz Sanchez-Cano, Mathias Rojo, Sae Aizawa, Nicolas Andre, Alain Barthe, Emmanuel Penou, Andrei Fedorov, Jean-Andre Sauvaud, Shoichiro Yokota, Yoshifumi Saito
Solar Physics Vol. 298 ( 5 ) 2023.5
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Interplanetary Scintillation Observations of Solar-Wind Disturbances During Cycles 23 and 24 Reviewed
Munetoshi Tokumaru, Ken'ichi Fujiki, Kazumasa Iwai
SOLAR PHYSICS Vol. 298 ( 2 ) 2023.2
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Solar observing with the Atacama large millimeter-submillimeter array Reviewed
T. S. Bastian, M. Shimojo, M. Bárta, S. M. White, K. Iwai
Frontiers in Astronomy and Space Sciences Vol. 9 2022.10
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Magnetohydrodynamic simulation of coronal mass ejections using interplanetary scintillation data observed from radio sites ISEE and LOFAR Reviewed
Kazumasa Iwai, Richard A. Fallows, Mario M. Bisi, Daikou Shiota, Bernard V. Jackson, Munetoshi Tokumaru, Ken'ichi Fujiki
Advances in Space Research 2022.9
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Application of novel interplanetary scintillation visualisations using LOFAR: A case study of merged CMEs from September 2017 Reviewed
R.A. Fallows, K. Iwai, B.V. Jackson, P. Zhang, M.M. Bisi, P. Zucca
Advances in Space Research 2022.9
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Over seven decades of solar microwave data obtained with Toyokawa and Nobeyama Radio Polarimeters Reviewed
Masumi Shimojo, Kazumasa Iwai
Geoscience Data Journal 2022.6
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Testing the Alfvén-wave Model of the Solar Wind with Interplanetary Scintillation Reviewed
Munehito Shoda, Kazumasa Iwai, Daikou Shiota
The Astrophysical Journal Vol. 928 ( 2 ) page: 130 - 130 2022.4
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Global Distribution of the Solar Wind Speed Reconstructed from Improved Tomographic Analysis of Interplanetary Scintillation Observations between 1985 and 2019 Reviewed
Munetoshi Tokumaru, Ken'ichi Fujiki, Masayoshi Kojima, Kazumasa Iwai
ASTROPHYSICAL JOURNAL Vol. 922 ( 1 ) 2021.11
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BepiColombo’s Cruise Phase: Unique Opportunity for Synergistic Observations Reviewed
L. Z. Hadid, V. Génot, S. Aizawa, A. Milillo, J. Zender, G. Murakami, J. Benkhoff, I. Zouganelis, T. Alberti, N. André, Z. Bebesi, F. Califano, A. P. Dimmock, M. Dosa, C. P. Escoubet, L. Griton, G. C. Ho, T. S. Horbury, K. Iwai, M. Janvier, E. Kilpua, B. Lavraud, A. Madar, Y. Miyoshi, D. Müller, R. F. Pinto, A. P. Rouillard, J. M. Raines, N. Raouafi, F. Sahraoui, B. Sánchez-Cano, D. Shiota, R. Vainio, A. Walsh
Frontiers in Astronomy and Space Sciences Vol. 8 2021.9
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Venus's induced magnetosphere during active solar wind conditions at BepiColombo's Venus 1 flyby Reviewed
Martin Volwerk, Beatriz Sanchez-Cano, Daniel Heyner, Sae Aizawa, Nicolas Andre, Ali Varsani, Johannes Mieth, Stefano Orsini, Wolfgang Baumjohann, David Fischer, Yoshifumi Futaana, Richard Harrison, Harald Jeszenszky, Iwai Kazumasa, Gunter Laky, Herbert Lichtenegger, Anna Milillo, Yoshizumi Miyoshi, Rumi Nakamura, Ferdinand Plaschke, Ingo Richter, Sebastian Rojas Mata, Yoshifumi Saito, Daniel Schmid, Daikou Shiota, Cyril Simon Wedlund
ANNALES GEOPHYSICAE Vol. 39 ( 5 ) page: 811 - 831 2021.9
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PSTEP: project for solar-terrestrial environment prediction Reviewed
Kanya Kusano, Kiyoshi Ichimoto, Mamoru Ishii, Yoshizumi Miyoshi, Shigeo Yoden, Hideharu Akiyoshi, Ayumi Asai, Yusuke Ebihara, Hitoshi Fujiwara, Tada-Nori Goto, Yoichiro Hanaoka, Hisashi Hayakawa, Keisuke Hosokawa, Hideyuki Hotta, Kornyanat Hozumi, Shinsuke Imada, Kazumasa Iwai, Toshihiko Iyemori, Hidekatsu Jin, Ryuho Kataoka, Yuto Katoh, Takashi Kikuchi, Yuki Kubo, Satoshi Kurita, Haruhisa Matsumoto, Takefumi Mitani, Hiroko Miyahara, Yasunobu Miyoshi, Tsutomu Nagatsuma, Aoi Nakamizo, Satoko Nakamura, Hiroyuki Nakata, Naoto Nishizuka, Yuichi Otsuka, Shinji Saito, Susumu Saito, Takashi Sakurai, Tatsuhiko Sato, Toshifumi Shimizu, Hiroyuki Shinagawa, Kazuo Shiokawa, Daikou Shiota, Takeshi Takashima, Chihiro Tao, Shin Toriumi, Satoru Ueno, Kyoko Watanabe, Shinichi Watari, Seiji Yashiro, Kohei Yoshida, Akimasa Yoshikawa
EARTH PLANETS AND SPACE Vol. 73 ( 1 ) 2021.8
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BepiColombo Science Investigations During Cruise and Flybys at the Earth, Venus and Mercury Reviewed
Valeria Mangano, Melinda Dósa, Markus Fränz, Anna Milillo, Joana S. Oliveira, Yeon Joo Lee, Susan McKenna-Lawlor, Davide Grassi, Daniel Heyner, Alexander S. Kozyrev, Roberto Peron, Jörn Helbert, Sebastien Besse, Sara de la Fuente, Elsa Montagnon, Joe Zender, Martin Volwerk, Jean-Yves Chaufray, James A. Slavin, Harald Krüger, Alessandro Maturilli, Thomas Cornet, Kazumasa Iwai, Yoshizumi Miyoshi, Marco Lucente, Stefano Massetti, Carl A. Schmidt, Chuanfei Dong, Francesco Quarati, Takayuki Hirai, Ali Varsani, Denis Belyaev, Jun Zhong, Emilia K. J. Kilpua, Bernard V. Jackson, Dusan Odstrcil, Ferdinand Plaschke, Rami Vainio, Riku Jarvinen, Stavro Lambrov Ivanovski, Ákos Madár, Géza Erdős, Christina Plainaki, Tommaso Alberti, Sae Aizawa, Johannes Benkhoff, Go Murakami, Eric Quemerais, Harald Hiesinger, Igor G. Mitrofanov, Luciano Iess, Francesco Santoli, Stefano Orsini, Herbert Lichtenegger, Gunther Laky, Stas Barabash, Richard Moissl, Juhani Huovelin, Yasumasa Kasaba, Yoshifumi Saito, Masanori Kobayashi, Wolfgang Baumjohann
Space Science Reviews Vol. 217 ( 1 ) 2021.2
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Kazumasa Iwai, Daikou Shiota, Munetoshi Tokumaru, Ken’ichi Fujiki, Mitsue Den, Yûki Kubo
Earth, Planets and Space Vol. 73 ( 1 ) 2021.1
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Estimating the Temperature and Density of a Spicule from 100 GHz Data Obtained with ALMA Reviewed
Masumi Shimojo, Tomoko Kawate, Takenori J. Okamoto, Takaaki Yokoyama, Noriyuki Narukage, Taro Sakao, Kazumasa Iwai, Gregory D. Fleishman, Kazunari Shibata
The Astrophysical Journal Vol. 888 ( 2 ) 2020.1
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Spectral Structures of Type II Solar Radio Bursts and Solar Energetic Particles Reviewed International coauthorship International journal
Iwai, Kazumasa, Yashiro, Seiji, Nitta, Nariaki, V, Kubo, Yuki
ASTROPHYSICAL JOURNAL Vol. 888 ( 1 ) 2020.1
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Coordinated Interplanetary Scintillation Observations in Japan and Russia for Coronal Mass Ejection Events in Early September 2017 Reviewed
Tokumaru, Munetoshi, Fujiki, Ken'ichi, Iwai, Kazumasa, Tyul'bashev, Sergey, Chashei, Igor
SOLAR PHYSICS Vol. 294 ( 7 ) 2019.7
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Development of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations Reviewed
Iwai Kazumasa, Shiota Daikou, Tokumaru Munetoshi, Fujiki Ken'ichi, Den Mitsue, Kubo Yuki
EARTH PLANETS AND SPACE Vol. 71 2019.4
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Comparative Study of Microwave Polar Brightening, Coronal Holes, and Solar Wind over the Solar Poles Reviewed
Fujiki Ken'ichi, Shibasaki Kiyoto, Yashiro Seiji, Tokumaru Munetoshi, Iwai Kazumasa, Masuda Satoshi
SOLAR PHYSICS Vol. 294 ( 3 ) 2019.3
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Solar Polar Brightening and Radius at 100 and 230GHz Observed by ALMA Reviewed
Selhorst Caius L, Simoes Paulo J. A, Brajsa Roman, Valio Adriana, Gimenez de, Castro C. G, Costa Joaquim E. R, Menezes Fabian, Pierre Rozelot Jean, Hales Antonio S, Iwai Kazumasa, White Stephen
ASTROPHYSICAL JOURNAL Vol. 871 ( 1 ) 2019.1
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Detection of Propagating Fast Sausage Waves through Detailed Analysis of a Zebra-pattern Fine Structure in a Solar Radio Burst Reviewed
K. Kaneda, H. Misawa, K. Iwai, S. Masuda, F. Tsuchiya, Y. Katoh, T. Obara
Astrophysical Journal Letters Vol. 855 ( 2 ) 2018.3
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Solar ALMA Observations: Constraining the Chromosphere above Sunspots Reviewed
Maria A. Loukitcheva, Kazumasa Iwai, Sami K. Solanki, Stephen M. White, Masumi Shimojo
ASTROPHYSICAL JOURNAL Vol. 850 ( 1 ) 2017.11
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Variation of the Solar Microwave Spectrum in the Last Half Century Reviewed
Masumi Shimojo, Kazumasa Iwai, Ayumi Asai, Satoshi Nozawa, Tetsuhiro Minamidani, Masao Saito
ASTROPHYSICAL JOURNAL Vol. 848 ( 1 ) 2017.10
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OCTAD-S: digital fast Fourier transform spectrometers by FPGA Reviewed
Kazumasa Iwai, Yuki Kubo, Hiromitsu Ishibashi, Takahiro Naoi, Kenichi Harada, Kenji Ema, Yoshinori Hayashi, Yuichi Chikahiro
EARTH PLANETS AND SPACE Vol. 69 page: 95 2017.7
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Observing the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA): Fast-Scan Single-Dish Mapping Reviewed
S. M. White, K. Iwai, N. M. Phillips, R. E. Hills, A. Hirota, P. Yagoubov, G. Siringo, M. Shimojo, T. S. Bastian, A. S. Hales, T. Sawada, S. Asayama, M. Sugimoto, R. G. Marson, W. Kawasaki, E. Muller, T. Nakazato, K. Sugimoto, R. Brajsa, I. Skokic, M. Barta, S. Kim, A. J. Remijan, I. de Gregorio, S. A. Corder, H. S. Hudson, M. Loukitcheva, B. Chen, B. De Pontieu, G. D. Fleishmann, D. E. Gary, A. Kobelski, S. Wedemeyer, Y. Yan
SOLAR PHYSICS Vol. 292 ( 7 ) 2017.7
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ALMA Discovery of Solar Umbral Brightness Enhancement at lambda=3 mm Reviewed International coauthorship International journal
Kazumasa Iwai, Maria Loukitcheva, Masumi Shimojo, Sami K. Solanki, Stephen M. White
ASTROPHYSICAL JOURNAL LETTERS Vol. 841 ( 2 ) page: L20 2017.6
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Polarization Characteristics of Zebra Patterns in Type IV Solar Radio Bursts Reviewed
K. Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara, Y. Katoh, S. Masuda
ASTROPHYSICAL JOURNAL Vol. 842 ( 1 ) 2017.6
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The First ALMA Observation of a Solar Plasmoid Ejection from an X-Ray Bright Point Reviewed International coauthorship International journal
Masumi Shimojo, Hugh S. Hudson, Stephen M. White, Timothy S. Bastian, Kazumasa Iwai
ASTROPHYSICAL JOURNAL LETTERS Vol. 841 ( 1 ) 2017.5
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The Brightness Temperature of the Quiet Solar Chromosphere at 2.6 mm Reviewed International coauthorship International journal
Kazumasa Iwai, Masumi Shimojo, Shinichiro Asayama, Tetsuhiro Minamidani, Stephen White, Timothy Bastian, Masao Saito
SOLAR PHYSICS Vol. 292 ( 1 ) page: 22 2017.1
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Microwave observations of a large-scale coronal wave with the Nobeyama radioheliograph Reviewed
A. Warmuth, K. Shibasaki, K. Iwai, G. Mann
ASTRONOMY & ASTROPHYSICS Vol. 593 2016.9
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CORONAL MAGNETIC FIELDS DERIVED FROM SIMULTANEOUS MICROWAVE AND EUV OBSERVATIONS AND COMPARISON WITH THE POTENTIAL FIELD MODEL Reviewed
Shun Miyawaki, Kazumasa Iwai, Kiyoto Shibasaki, Daikou Shiota, Satoshi Nozawa
ASTROPHYSICAL JOURNAL Vol. 818 ( 1 ) 2016.2
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CHROMOSPHERIC SUNSPOTS IN THE MILLIMETER RANGE AS OBSERVED BY THE NOBEYAMA RADIOHELIOGRAPH Reviewed
Kazumasa Iwai, Hideki Koshiishi, Kiyoto Shibasaki, Satoshi Nozawa, Shun Miyawaki, Takuro Yoneya
ASTROPHYSICAL JOURNAL Vol. 816 ( 2 ) page: 91 2016.1
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FREQUENCY DEPENDENCE OF POLARIZATION OF ZEBRA PATTERN IN TYPE-IV SOLAR RADIO BURSTS Reviewed
Kazutaka Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara
ASTROPHYSICAL JOURNAL LETTERS Vol. 808 ( 2 ) 2015.8
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SOLAR MICRO-TYPE III BURST STORMS AND LONG DIPOLAR MAGNETIC FIELD IN THE OUTER CORONA Reviewed
A. Morioka, Y. Miyoshi, K. Iwai, Y. Kasaba, S. Masuda, H. Misawa, T. Obara
ASTROPHYSICAL JOURNAL Vol. 808 ( 2 ) 2015.8
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OBSERVATION OF THE CHROMOSPHERIC SUNSPOT AT MILLIMETER RANGE WITH THE NOBEYAMA 45 m TELESCOPE Reviewed
Kazumasa Iwai, Masumi Shimojo
ASTROPHYSICAL JOURNAL Vol. 804 ( 1 ) page: 48 2015.5
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Coronal magnetic field and the plasma beta determined from radio and multiple satellite observations Invited Reviewed
Iwai Kazumasa, Shibasaki, K., Nozawa, S., Takahashi, T., Sawada, S., Kitagawa, J., Miyawaki, S. and Kashiwagi, H.
Earth Planets and Space Vol. 66 page: 149 2014.11
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SPECTRAL STRUCTURES AND THEIR GENERATION MECHANISMS FOR SOLAR RADIO TYPE-I BURSTS Reviewed
K. Iwai, Y. Miyoshi, S. Masuda, F. Tsuchiya, A. Morioka, H. Misawa
ASTROPHYSICAL JOURNAL Vol. 789 ( 1 ) page: 4 2014.7
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GENERATION MECHANISM OF THE SLOWLY DRIFTING NARROWBAND STRUCTURE IN THE TYPE IV SOLAR RADIO BURSTS OBSERVED BY AMATERAS Reviewed
Y. Katoh, K. Iwai, Y. Nishimura, A. Kumamoto, H. Misawa, F. Tsuchiya, T. Ono
ASTROPHYSICAL JOURNAL Vol. 787 ( 1 ) 2014.5
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Kazumasa Iwai, Kiyoto Shibasaki
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN Vol. 65 ( SP1 ) page: S14 2013.12
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PEAK FLUX DISTRIBUTIONS OF SOLAR RADIO TYPE-I BURSTS FROM HIGHLY RESOLVED SPECTRAL OBSERVATIONS Reviewed
K. Iwai, S. Masuda, Y. Miyoshi, F. Tsuchiya, A. Morioka, H. Misawa
ASTROPHYSICAL JOURNAL LETTERS Vol. 768 ( 1 ) page: L2 2013.5
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IPRT/AMATERAS: A New Metric Spectrum Observation System for Solar Radio Bursts Reviewed
K. Iwai, F. Tsuchiya, A. Morioka, H. Misawa
SOLAR PHYSICS Vol. 277 ( 2 ) page: 447 - 457 2012.4
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SOLAR RADIO TYPE-I NOISE STORM MODULATED BY CORONAL MASS EJECTIONS Reviewed
K. Iwai, Y. Miyoshi, S. Masuda, M. Shimojo, D. Shiota, S. Inoue, F. Tsuchiya, A. Morioka, H. Misawa
ASTROPHYSICAL JOURNAL Vol. 744 ( 2 ) page: 167 2012.1