Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Kiyoto Shibasaki"'
Comparative Study of Microwave Polar Brightening, Coronal Holes, and Solar Wind over the Solar Poles
Autor:
Ken'ichi Fujiki, Kiyoto Shibasaki, Satoshi Masuda, Munetoshi Tokumaru, Seiji Yashiro, Kazumasa Iwai
Publikováno v:
Solar Physics. 294
We compared the long-term variation (1992–2017) in solar polar brightening observed with the Nobeyama Radioheliograph, the polar solar-wind velocity with interplanetary scintillation observations at the Institute for Space-Earth Environmental Resea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b69f58f08dcc3df5fd9cf3e5a8b0d39a
https://doi.org/10.1007/s11207-019-1418-6
https://doi.org/10.1007/s11207-019-1418-6
Publikováno v:
Solar Physics. 290:21-35
We analysed specific regions of reduced soft X-ray and microwave emission in five large isolated sunspots. The Nobeyama Radioheliograph 17 GHz observations reveal a local depression of microwave brightness in the peripheral area of the sunspots. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7cb63c1d83ade6ed81dde6bd6c8b13b
https://doi.org/10.1007/s11207-014-0634-3
https://doi.org/10.1007/s11207-014-0634-3
Publikováno v:
Space Science Reviews
Space Science Reviews, Springer Verlag, 2014, 186 (1-4), pp.105-135. ⟨10.1007/s11214-014-0089-8⟩
Space Science Reviews, 2014, 186 (1-4), pp.105-135. ⟨10.1007/s11214-014-0089-8⟩
Space Science Reviews, Springer Verlag, 2014, 186 (1-4), pp.105-135. ⟨10.1007/s11214-014-0089-8⟩
Space Science Reviews, 2014, 186 (1-4), pp.105-135. ⟨10.1007/s11214-014-0089-8⟩
A variety of indices have been proposed in order to represent the many different observables modulated by the solar cycle. Most of these indices are highly correlated with each other owing to their intrinsic link with the solar magnetism and the domi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cc2e8832a1c30b0acf63d66f480be36
Publikováno v:
Solar Physics. 284:559-578
Quasi-periodic pulsations (QPPs) with at least three simultaneously existing spectral components with periods P≥30 s, P≈20 s, and about P≈10 s were detected during the decay phase of a solar flare on 3 July 2002, observed with the Nobeyama Radi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54797c5c03358ae7af78403d564c9136
https://doi.org/10.1007/s11207-012-0141-3
https://doi.org/10.1007/s11207-012-0141-3
Publikováno v:
Solar Physics. 270:175-189
We present a new method that combines the results of an oscillation study made in optical and radio observations. The optical spectral measurements in photospheric and chromospheric lines of the line-of-sight velocity were carried out at the Sayan So
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::407d1e04a83e326836b944ac1c690bfa
https://doi.org/10.1007/s11207-011-9716-7
https://doi.org/10.1007/s11207-011-9716-7
Publikováno v:
Solar Physics. 267:329-342
Quasi-periodic pulsations (QPP) of microwave emission generated in single flaring loops observed with the Nobeyama Radioheliograph (NoRH) and Nobeyama Radio Polarimeters (NoRP) are studied. Specific features of the time profiles, i.e. the visible pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45d4748c246dd55844ce459c2f9cc3f8
https://doi.org/10.1007/s11207-010-9642-0
https://doi.org/10.1007/s11207-010-9642-0
Publikováno v:
The Astrophysical Journal. 724:171-181
We studied the spatial dynamics of the flaring loop in the 2005 August 22 event using microwave (NoRH) and hard X-ray (RHESSI) observations together with complementary data from SOHO/MDI, SMART at Hida, SOHO/EIT, and TRACE. We have found that (1) the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b570b9c4e10012d80228aa74a737dafd
https://doi.org/10.1088/0004-637x/724/1/171
https://doi.org/10.1088/0004-637x/724/1/171
Autor:
Kiyoto Shibasaki, Sergey P. Gorbikov, Irina Myagkova, Veronika Reznikova, Haisheng Ji, Nikolai P. Pyatakov, V. F. Melnikov
Publikováno v:
The Astrophysical Journal. 697:735-746
High-resolution radio observation of Nobeyama Radioheliograph at 17 and 34 GHz allowed studying the dynamics of microwave brightness distribution along the giant limb flaring loop in the event of 2002 August 24. It is found that on the rising phase o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0aa381101f70e8f5d72ab9ec218af77d
https://doi.org/10.1088/0004-637x/697/1/735
https://doi.org/10.1088/0004-637x/697/1/735
Publikováno v:
Proceedings of the International Astronomical Union. 4:95-99
The observations of 3 and 5 minute oscillations in sunspots present information on propagation of MHD waves in the magnetic tubes of sunspots. We present a comparison of wavelet spectra of radio flux oscillations at λ = 1.76 cm and oscillations of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c23ec8606df387a6d2fdd90ff42f4a96
https://doi.org/10.1017/s1743921309029147
https://doi.org/10.1017/s1743921309029147
Publikováno v:
Solar Physics. 253:161-172
Within the framework of ideal magnetohydrodynamics the excitation of the ballooning instability in a toroidal coronal loop with a radius of cross section a and a radius of curvature R is analyzed by using the energy method. Kink oscillations are able
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6ee5ac3de38d1d1cc9c81c8c44febca
https://doi.org/10.1007/s11207-008-9199-3
https://doi.org/10.1007/s11207-008-9199-3