Search Publications
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…
Evolution of the Sheared Magnetic Fields of Two X-Class Flares Observed by Hinode/XRT
Golub, Leon; van Ballegooijen, Adriaan; Narukage, Noriyuki +6 more
We present multi-wavelength observations of the evolution of the sheared magnetic fields in NOAA Active Region 10930, where two X-class flares occurred on 2006 December 13 and December 14, respectively. Observations made with the X-ray Telescope (XRT) and the Solar Optical Telescope (SOT) aboard Hinode suggest that the gradual formation of the she…
Hinode Calibration for Precise Image Co-Alignment between SOT and XRT (2006 November-2007 April)
Kano, Ryohei; Sakao, Taro; Tsuneta, Saku +11 more
To understand the physical mechanisms for activity and heating in the solar atmosphere, the magnetic coupling from the photosphere to the corona is an important piece of information from the Hinode observations, and therefore precise positional alignment is required among the data acquired by different telescopes. The Hinode spacecraft and its onb…
Suzaku Observation of the Metallicity Distribution in the Intracluster Medium of the Fornax Cluster
Fukazawa, Yasushi; Makishima, Kazuo; Nakazawa, Kazuhiro +10 more
The metallicity distribution in the Fornax cluster was studied with the XIS instrument on board the Suzaku satellite. The K-shell lines of O and Mg were resolved clearly, and the abundances of O, Mg, Si, S, and Fe were measured with great accuracy. The region within a 4' radius of NGC 1399 shows approximately solar abundances of Fe, Si, and S, whi…
Precision Fe Kα and Fe Kβ Line Spectroscopy of the Seyfert 1.9 Galaxy NGC 2992 with Suzaku
Haba, Yoshito; Okajima, Takashi; Serlemitsos, Peter J. +13 more
We present detailed time-averaged X-ray spectroscopy in the 0.5-10keV band of the Seyfert 1.9 galaxy NGC 2992 with the Suzaku X-ray Imaging Spectrometer (XIS). There is an Fe K line emission complex that we model with broad and narrow lines and we show that the intensities of the two components are decoupled at a confidence level >3σ The broad …