Zobrazeno 1 - 10
of 286
pro vyhledávání: '"Tsuneta, Saku"'
Fine-structure dynamics in solar prominences holds critical clues to understanding their physical nature of significant space-weather implications. We report evidence of rotational motions of horizontal helical threads in two active-region prominence
Externí odkaz:
http://arxiv.org/abs/1608.00123
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:
Judge, Philip, Kleint, Lucia, Uitenbroek, Han, Rempel, Matthias, Suematsu, Yoshinori, Tsuneta, Saku
We revisit an old question: what are the effects of observing stratified atmospheres on scales below a photon mean free path? The mean free path of photons emerging from the solar photosphere and chromosphere is near 100 km. Using current 1m-class te
Externí odkaz:
http://arxiv.org/abs/1409.7866
Autor:
Suzuki, Takeru K., Imada, Shinsuke, Kataoka, Ryuho, Kato, Yoshiaki, Matsumoto, Takuma, Miyahara, Hiroko, Tsuneta, Saku
We investigate mass losses via stellar winds from sun-like main sequence stars with a wide range of activity levels. We perform forward-type magnetohydrodynamical numerical experiments for Alfven wave-driven stellar winds with a wide range of the inp
Externí odkaz:
http://arxiv.org/abs/1212.6713
Autor:
Teriaca, Luca, Andretta, Vincenzo, Auchère, Frédéric, Brown, Charles M., Buchlin, Eric, Cauzzi, Gianna, Culhane, J. Len, Curdt, Werner, Davila, Joseph M., Del Zanna, Giulio, Doschek, George A., Fineschi, Silvano, Fludra, Andrzej, Gallagher, Peter T., Green, Lucie, Harra, Louise K., Imada, Shinsuke, Innes, Davina, Kliem, Bernhard, Korendyke, Clarence, Mariska, John T., Martínez-Pillet, Valentin, Parenti, Susanna, Patsourakos, Spiros, Peter, Hardi, Poletto, Luca, Rutten, Rob, Schühle, Udo, Siemer, Martin, Shimizu, Toshifumi, Socas-Navarro, Hector, Solanki, Sami K., Spadaro, Daniele, Trujillo-Bueno, Javier, Tsuneta, Saku, Dominguez, Santiago Vargas, Vial, Jean-Claude, Walsh, Robert, Warren, Harry P., Wiegelmann, Thomas, Winter, Berend, Young, Peter
Understanding the solar outer atmosphere requires concerted, simultaneous solar observations from the visible to the vacuum ultraviolet (VUV) and soft X-rays, at high spatial resolution (between 0.1" and 0.3"), at high temporal resolution (on the ord
Externí odkaz:
http://arxiv.org/abs/1109.4301
It is generally agreed that small impulsive energy bursts called nanoflares are responsible for at least some of the Sun's hot corona, but whether they are the explanation for most of the multi-million degree plasma has been a matter of ongoing debat
Externí odkaz:
http://arxiv.org/abs/1105.2506
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:
Narukage, Noriyuki, Sakao, Taro, Kano, Ryouhei, Hara, Hirohisa, Shimojo, Masumi, Bando, Takamasa, Urayama, Fumitaka, DeLuca, Edward, Golub, Leon, Weber, Mark, Grigis, Paolo, Cirtain, Jonathan, Tsuneta, Saku
The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager that observes the solar corona with unprecedentedly high angular resolution (consistent with its 1" pixel size). XRT has nine X-ray analysis filters with different temperature
Externí odkaz:
http://arxiv.org/abs/1011.2867
Continuous observations were performed of a quiescent prominence with the Solar Optical Telescope (SOT) on board the /emph{Hinode} satellite on 2006 December 23--24. A peculiar slowly-rising column of $/sim10^{4}$ K plasma develops from the lower atm
Externí odkaz:
http://arxiv.org/abs/1006.4633