Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Kenichi Otsuji"'
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
Abstract It is widely recognised that filament disappearances or eruptions are frequently associated with Coronal Mass Ejections (CMEs). Since CMEs are a major source of disturbances of the space environment surrounding the Earth, it is important to
Externí odkaz:
https://doaj.org/article/104fc6dd599f4b95bba4696e0adf5e5d
Autor:
Yuji Kotani, Kazunari Shibata, Takako T. Ishii, Daiki Yamasaki, Kenichi Otsuji, Kiyoshi Ichimoto, Ayumi Asai
Publikováno v:
The Astrophysical Journal, Vol 943, Iss 2, p 143 (2023)
We often find spectral signatures of chromospheric cold plasma ejections accompanied by flares in a wide range of spatial scales in the solar and stellar atmospheres. However, the relationship between physical quantities (such as mass, kinetic energy
Externí odkaz:
https://doaj.org/article/688a17df9d5c4a649948a2cc46b978b2
Autor:
Yuji Kotani, Kazunari Shibata, Takako T. Ishii, Daiki Yamasaki, Kenichi Otsuji, Kiyoshi Ichimoto, Ayumi Asai
We often find spectral signatures of chromospheric cold plasma ejections accompanied by flares in a wide range of spatial scales in the solar and stellar atmospheres. However, the relationship between physical quantities (such as mass, kinetic energy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::169bbdf8d8e8f6f9a0191df2f53dda71
Autor:
Daikichi Seki, Giulio Del Zanna, Hiroaki Isobe, Takako T. Ishii, Kiyoshi Ichimoto, Kenichi Otsuji, Kazunari Shibata, Takahito Sakaue
A filament, a dense cool plasma supported by the magnetic fields in the solar corona, often becomes unstable and erupts. It is empirically known that the filament often demonstrates some activations such as a turbulent motion prior to eruption. In ou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c281b29504b233fbdd46fbeb668f4032
http://arxiv.org/abs/2106.11875
http://arxiv.org/abs/2106.11875
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
It is widely recognised that filament disappearances or eruptions are frequently associated with Coronal Mass Ejections (CMEs). Since CMEs are a major source of disturbances of the space environment surrounding the Earth, it is important to investiga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26a68a71b06d6a057a917d3069b23224
Autor:
Yusuke Yoshinaga, Maria V. Gutierrez, Takako T. Ishii, Kazunari Shibata, José K. Ishitsuka, Naoki Nakamura, Ayumi Asai, Raul Terrazas, Kenichi Otsuji, Satoshi Morita, Reizaburo Kitai, Satoru Ueno, M. Ishitsuka
We present a detailed three-dimensional (3D) view of a prominence eruption, coronal loop expansion, and coronal mass ejections (CMEs) associated with an M4.4 flare that occurred on 2011 March 8 in the active region NOAA 11165. Full-disk H$\alpha$ ima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::076555754fa305af339ac4e547ec0847
http://arxiv.org/abs/2101.08575
http://arxiv.org/abs/2101.08575
Autor:
Takako T. Ishii, Kazunari Shibata, Kiyoshi Ichimoto, Daikichi Seki, Ayumi Asai, Hiroaki Isobe, Kenichi Otsuji, Kumi Hirose, Satoru Ueno, Denis P. Cabezas, Tomoya Iju
This paper describes a new SMART/SDDI Filament Disappearance Catalogue, in which we listed almost all the filament disappearance events that the Solar Dynamics Doppler Imager (SDDI) has observed since its installation on the Solar Magnetic Activity R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::924d37e48512e65e283a3d59da1f2c4f
https://doi.org/10.31401/sungeo.2020.02.01
https://doi.org/10.31401/sungeo.2020.02.01
Autor:
Kazunari Shibata, Hiroaki Isobe, Daikichi Seki, Kiyoshi Ichimoto, Takako T. Ishii, Kenichi Otsuji
Publikováno v:
Publications of the Astronomical Society of Japan. 71
Filaments, the dense cooler plasma floating in the solar corona supported by magnetic fields, generally exhibit certain activations before they erupt. In our previous study (Seki et al. 2017 ), we observed that the standard deviation of the line-of-s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea96850d98131b09bc549c9fb20d392f
https://doi.org/10.1093/pasj/psz031
https://doi.org/10.1093/pasj/psz031
Autor:
Yusaku Watanabe, Katsuya Kondo, Tomoya Iju, Masashi Fujiyama, Shin Toriumi, Satoshi Nozawa, Shinsuke Imada, Kenichi Otsuji, Hisashi Hayakawa, Toshiki Kawai
Publikováno v:
Solar Physics. 294
We revisit the sunspot drawings made by the Japanese astronomer Kunitomo Toubei during 1835-1836 and recount the sunspot group number for each image. There are two series of drawings, preliminary (P, containing 17 days with observations) and summary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0f2375f6be7038700c39740e73bbe7f
https://doi.org/10.1007/s11207-019-1429-3
https://doi.org/10.1007/s11207-019-1429-3