Search Publications
Probing the Disk-Jet Connection of the Radio Galaxy 3C 120 Observed with Suzaku
Isobe, Naoki; Takahashi, Tadayuki; Tashiro, Makoto S. +13 more
We report on deep (40ks × 4) observations of the bright broad line radio galaxy 3C 120 using Suzaku. The observations were spaced one week apart, and sampled a range of continuum fluxes. An excellent broadband spectrum was obtained over two decades of frequency (0.6 to 50keV) within each 40ks exposure. We clearly resolved the iron K emission-line …
Hinode Observations of a Vector Magnetic Field Change Associated with a Flare on 2006 December 13
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +10 more
Continuous observations of the flare productive active region 10930 were successfully carried out with the Solar Optical Telescope aboard the Hinode spacecraft during 2006 December 6 to 19. We focused on the evolution of photospheric magnetic fields in this active region, and the magnetic field properties at the site of the X3.4 class flare, using…
Discovery of a Temperature-Dependent Upflow in the Plage Region During a Gradual Phase of the X-Class Flare
Harra, Louise K.; Hara, Hirohisa; Kamio, Suguru +5 more
We present Hinode/EIS raster scan observations of the plage region taken during the gradual phase of the GOES X3.2 flare that occurred on 2006 December 13. The plage region is located 200" east of the flare arcade. The plage region has a small transient coronal hole. The transient coronal hole is strongly affected by an X-class flare, and upflows …
Hinode EUV Study of Jets in the Sun's South Polar Corona
Harra, Louise K.; Doschek, George A.; Lundquist, Loraine L. +8 more
A number of coronal bright points and associated plasma jet features were seen in an observation of the South polar coronal hole during 2007 January. The 40" wide slot was used at the focus of the Hinode EUV Imaging Spectrometer to provide spectral images for two of these events. Light curves are plotted for a number of emission lines that include…
Fine Structures of Solar X-Ray Jets Observed with the X-Ray Telescope aboard Hinode
Shimojo, Masumi; Narukage, Noriyuki; Kano, Ryohei +7 more
The X-Ray Telescope (XRT) aboard Hinode has revealed the fine structure of solar X-ray jets. One of the fine structures observed by XRT is an expanding loop. The loop appeared near the footpoint of the jet when footpoint brightening was observed. Additionally, we have found that the X-ray jets began just after the expanding loop ``breaks''. Other …
Formation Process of a Light Bridge Revealed with the Hinode Solar Optical Telescope
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +10 more
The Solar Optical Telescope (SOT) on-board Hinode successfully and continuously observed the formation process of a light bridge in a matured sunspot of the NOAA active region 10923 for several days with high spatial resolution. During its formation, many umbral dots were observed to be emerging from the leading edges of penumbral filaments, and r…
Hinode Observations of Horizontal Quiet Sun Magnetic Flux and the ``Hidden Turbulent Magnetic Flux''
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +10 more
We present observations of magnetic fields of the very quiet Sun near disk center using the Spectro-Polarimeter of the Solar Optical Telescope aboard the Hinode satellite. These observations reveal for the first time the ubiquitous presence of horizontal magnetic fields in the internetwork regions. The horizontal fields are spatially distinct from…
Solar Transition Region Features Observed with Hinode/EIS
Del Zanna, Giulio; Doschek, George A.; Hara, Hirohisa +3 more
Two types of solar active region feature prominent at transition region temperatures are identified in Hinode/EIS data of AR 10938 taken on 2007 January 20. The footpoints of 1 MK TRACE loops are shown to emit strongly in emission lines formed at log T = 5.4-5.8, allowing the temperature increase along the footpoints to be clearly seen. A density …
X-Ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku
Ishida, Manabu; Sato, Kosuke; Fukazawa, Yasushi +14 more
We carried out observations of the central and 20' east offset regions of the cluster of galaxies Abell 1060 with Suzaku. Spatially resolved X-ray spectral analysis has revealed temperature and abundance profiles of Abell 1060 out to 27' ≃ 380 h70-1 kpc, which corresponds to ∼ 0.25 r180. Temperature decrease of the…
Velocity Structure of Jets in a Coronal Hole
Shibata, Kazunari; Warren, Harry P.; Hara, Hirohisa +4 more
The velocity structures of jets in a coronal hole have been derived for the first time. Hinode observations revealed the existence of many bright points in coronal holes. They are loop-shaped and sometimes associated with coronal jets. Spectra obtained with the Extreme-ultraviolet Imaging Spectrometer aboard Hinode were analyzed to infer the Doppl…