Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Ishikawa, Ryohko"'
Autor:
Li, Hao, Alemán, Tanausú del Pino, Bueno, Javier Trujillo, Ishikawa, Ryohko, Ballester, Ernest Alsina, McKenzie, David E., Belluzzi, Luca, Song, Donguk, Okamoto, Takenori J., Kobayashi, Ken, Rachmeler, Laurel A., Bethge, Christian, Auchère, Frédéric
We apply the HanleRT Tenerife Inversion Code to the spectro-polarimetric observations obtained by the Chromospheric LAyer SpectroPolarimeter. This suborbital space experiment measured the variation with wavelength of the four Stokes parameters in the
Externí odkaz:
http://arxiv.org/abs/2408.06094
Autor:
Ishikawa, Ryohko, Bueno, Javier Trujillo, Ballester, Ernest Alsina, Belluzzi, Luca, Alemán, Tanausú del Pino, McKenzie, David E., Auchère, Frédéric, Kobayashi, Ken, Okamoto, Takenori J., Rachmeler, Laurel A., Song, Donguk
Radiative transfer investigations of the solar Mg II h and k resonance lines around 280~nm showed that, while their circular polarization (Stokes V) signals arise from the Zeeman effect, the linear polarization profiles (Stokes Q and U) are dominated
Externí odkaz:
http://arxiv.org/abs/2302.03303
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
Autor:
Ishikawa, Shin-nosuke, Shimizu, Toshifumi, Kano, Ryouhei, Bando, Takamasa, Ishikawa, Ryohko, Giono, Gabriel, Tsuneta, Saku, Nakayama, Satoshi, Tajima, Takao
We developed a polarization modulation unit (PMU) to rotate a waveplate continuously in order to observe solar magnetic fields by spectropolarimetry. The non-uniformity of the PMU rotation may cause errors in the measurement of the degree of linear p
Externí odkaz:
http://arxiv.org/abs/1509.05716
Autor:
Song, Donguk1,2 (AUTHOR) donguksong@kasi.re.kr, Ishikawa, Ryohko2 (AUTHOR), Kano, Ryouhei2 (AUTHOR), McKenzie, David E.3 (AUTHOR), Trujillo Bueno, Javier4,5,6 (AUTHOR), Auchère, Frédéric7 (AUTHOR), Rachmeler, Laurel A.8 (AUTHOR), Okamoto, Takenori J.2 (AUTHOR), Yoshida, Masaki2,9 (AUTHOR), Kobayashi, Ken3 (AUTHOR), Bethge, Christian10 (AUTHOR), Hara, Hirohisa2 (AUTHOR), Shinoda, Kazuya2 (AUTHOR), Shimizu, Toshifumi11 (AUTHOR), Suematsu, Yoshinori2 (AUTHOR), De Pontieu, Bart12,13,14 (AUTHOR), Winebarger, Amy3 (AUTHOR), Narukage, Noriyuki2 (AUTHOR), Kubo, Masahito2 (AUTHOR), Sakao, Taro11 (AUTHOR)
Publikováno v:
Solar Physics. Oct2022, Vol. 297 Issue 10, p1-32. 32p.
Autor:
Ishikawa, Ryohko, Tsuneta, Saku
Publikováno v:
The Astrophysical Journal Letters, Volume 718, Issue 2, pp. L171-L175 (2010)
We obtained a long exposure vector magnetogram of the quiet Sun photosphere at the disk center with wide FOV of $51" \times 82"$. The observation was performed at Fe I 525.0 nm with the shutter-less mode of the Narrow Band Filter Imager of the Solar
Externí odkaz:
http://arxiv.org/abs/1103.5812
Autor:
Ishikawa, Ryohko, Tsuneta, Saku
Vertical magnetic fields have been known to exist in the internetwork region for decades, while the properties of horizontal magnetic fields have recently been extensively investigated with \textit{Hinode}. Vertical and horizontal magnetic fields in
Externí odkaz:
http://arxiv.org/abs/1103.5556
Autor:
Ishikawa, Ryohko, Tsuneta, Saku
Properties of transient horizontal magnetic fields (THMFs) in both plage and quiet Sun regions are obtained and compared. Spectro-polarimetric observations with the Solar Optical Telescope (SOT) on the Hinode satellite were carried out with a cadence
Externí odkaz:
http://arxiv.org/abs/0812.1631
Akademický článek
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Autor:
TSUZUKI, Toshihiro, SUEMATSU, Yoshinori, ISHIKAWA, Ryohko, KATSUKAWA, Yukio, HARA, Hirohisa, KAWATE, Tomoko, SHIMIZU, Toshifumi
Publikováno v:
第22回宇宙科学シンポジウム 講演集 = Proceedings of the 22nd Space Science Symposium.
第22回宇宙科学シンポジウム (2022年1月6日-7日. オンライン開催)
22nd Space Science Symposium (January 6-7, 2022. Online Meeting)
資料番号: SA6000176118
レポート番号: P-084
22nd Space Science Symposium (January 6-7, 2022. Online Meeting)
資料番号: SA6000176118
レポート番号: P-084