Zobrazeno 1 - 10
of 416
pro vyhledávání: '"SHIMIZU, toshifumi"'
Autor:
Koyama, Mayu, Shimizu, Toshifumi
A proposed mechanism for solar chromospheric heating is that magnetohydrodynamic waves propagate upward along magnetic field lines and dissipate their energy in the chromosphere. In particular, compressible magneto-acoustic waves may contribute to th
Externí odkaz:
http://arxiv.org/abs/2403.11419
Autor:
Kubo, Masahito, Katsukawa, Yukio, Expósito, David Hernández, Gómez, Antonio Sánchez, Jimenéz, María Balaguer, Suárez, David Orozco, Fernández, José M. Morales, del Moral, Beatriz Aparicio, Mantas, Antonio J. Moreno, Martínez, Eduardo Bailón, Iniesta, Jose Carlos del Toro, Kawabata, Yusuke, Noda, Carlos Quintero, Oba, Takayoshi, Ishikawa, Ryohtaroh T., Shimizu, Toshifumi
The Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) has been developed for the third flight of the SUNRISE balloon-borne stratospheric solar observatory. The aim of SCIP is to reveal the evolution of three-dimensional magnetic fields in the
Externí odkaz:
http://arxiv.org/abs/2307.16551
The solar magnetic structure changes over the solar cycle. It has a dipole structure during solar minimum, where the open flux extends mainly from the polar regions into the interplanetary space. During maximum, a complex structure is formed with low
Externí odkaz:
http://arxiv.org/abs/2304.13347
Autor:
Oba, Takayoshi, Shimizu, Toshifumi, Katsukawa, Yukio, Kubo, Masahito, Kawabata, Yusuke, Hara, Hirohisa, Uraguchi, Fumihiro, Tsuzuki, Toshihiro, Tamura, Tomonori, Shinoda, Kazuya, Kodeki, Kazuhide, Fukushima, Kazuhiko, Fernández, José Miguel Morales, Gómez, Antonio Sánchez, Jimenéz, María Balaguer, Expósito, David Hernández, Gandorfer, Achim
Publikováno v:
Solar Physics 2022
We developed a scan mirror mechanism (SMM) that enable a slit-based spectrometer or spectropolarimeter to precisely and quickly map an astronomical object. The SMM, designed to be installed in the optical path preceding the entrance slit, tilts a fol
Externí odkaz:
http://arxiv.org/abs/2207.13864
Microflares have been considered to be among the major energy input sources to form active solar corona. To investigate the response of the low atmosphere to events, we conducted an ALMA observation at 3 mm coordinated with IRIS and Hinode observatio
Externí odkaz:
http://arxiv.org/abs/2109.11215
Autor:
Ishikawa, Ryohko, Bueno, Javier Trujillo, Aleman, Tanausu del Pino, Okamoto, Takenori J., McKenzie, David E., Auchere, Frederic, Kano, Ryouhei, Song, Donguk, Yoshida, Masaki, Rachmeler, Laurel A., Kobayashi, Ken, Hara, Hirohisa, Kubo, Masahito, Narukage, Noriyuki, Sakao, Taro, Shimizu, Toshifumi, Suematsu, Yoshinori, Bethge, Christian, De Pontieu, Bart, Dalda, Alberto Sainz, Vigil, Genevieve D., Winebarger, Amy, Ballester, Ernest Alsina, Belluzzi, Luca, Stepan, Jiri, Ramos, Andres Asensio, Carlsson, Mats, Leenaarts, Jorrit
Publikováno v:
Science Advances, Vol. 7, no. 8, eabe8406, 2021
Routine ultraviolet imaging of the Sun's upper atmosphere shows the spectacular manifestation of solar activity; yet we remain blind to its main driver, the magnetic field. Here we report unprecedented spectropolarimetric observations of an active re
Externí odkaz:
http://arxiv.org/abs/2103.01583
Publikováno v:
2020, ApJ, 900, 34
We study the capabilities of Lyman $\beta$ and the O I 1027 and 1028 \AA\ spectral lines for understanding the properties of the chromosphere and transition region. The oxygen transitions are located in the wing of Lyman $\beta$ that is a candidate s
Externí odkaz:
http://arxiv.org/abs/2008.12556
The nonlinear force-free field (NLFFF) modeling has been extensively used to infer the three-dimensional (3D) magnetic field in the solar corona. One of the assumptions in the NLFFF extrapolation is that the plasma beta is low, but this condition is
Externí odkaz:
http://arxiv.org/abs/2006.00179
Autor:
Lee, Kyoung-Sun, Hara, Hirohisa, Watanabe, Kyoko, Joshi, Anand D., Brooks, David H., Imada, Shinsuke, Prasad, Avijeet, Dang, Phillip, Shimizu, Toshifumi, Savage, Sabrina L., Moore, Ronald, Panesar, Navdeep K., Reep, Jeffrey W.
We have investigated an M1.3 limb flare, which develops as a magnetic loop/arch that fans out from an X-ray jet. Using Hinode/EIS, we found that the temperature increases with height to a value of over 10$^{7}$ K at the loop-top during the flare. The
Externí odkaz:
http://arxiv.org/abs/2005.09875