Search Publications
EUV Emission Lines and Diagnostics Observed with Hinode/EIS
Del Zanna, Giulio; Landi, Enrico; Harra, Louise K. +9 more
Quiet Sun and active region spectra from the Hinode/EIS instrument are presented, and the strongest lines from different temperature regions discussed. A list of emission lines recommended to be included in EIS observation studies is presented based on analysis of blending and diagnostic potential using the CHIANTI atomic database. In addition we …
A Study of Polar Jet Parameters Based on Hinode XRT Observations
Golub, Leon; Shimojo, Masumi; Narukage, Noriyuki +9 more
Hinode/SOHO campaign 7197 is the most extensive study of polar jet formation and evolution from within both the north and south polar coronal holes so far. For the first time, this study showed that the appearance of X-ray jets in the solar coronal holes occurs at very high frequency - about 60 jets d-1 on average. Using observations co…
Suzaku Observations of the Hard X-Ray Variability of MCG -6-30-15: the Effects of Strong Gravity around a Kerr Black Hole
Fabian, Andrew C.; Kunieda, Hideyo; Haba, Yoshito +21 more
Suzaku has, for the first time, enabled the hard X-ray variability of the Seyfert 1 galaxy MCG -6-30-15 to be measured. The variability in the 14-45keV band, which is dominated by a strong reflection hump, is quenched relative to that at a few keV. This directly demonstrates that the whole reflection spectrum is much less variable than the power-l…
Evidence for Solar-Wind Charge-Exchange X-Ray Emission from the Earth's Magnetosheath
Yamaguchi, Hiroya; Mitsuda, Kazuhisa; Fujimoto, Ryuichi +7 more
We report an apparent detection of the C VI 4p to 1s transition line at 459eV, during a long-term enhancement (LTE) in the Suzaku north ecliptic pole observation of 2005 September 2. The observed line intensity is comparable to that of the C VI 2p to 1s line at 367eV. This is strong evidence for the charge-exchange process. In addition, O VII , O …
Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission
Maeda, Yoshitomo; Takahashi, Tadayuki; Koyama, Katsuji +14 more
We have observed the diffuse X-ray emission from the Galactic Center (GC) using the X-ray Imaging Spectrometer (XIS) on Suzaku. The high-energy resolution and the low-background orbit provided excellent spectra of the GC diffuse X-rays (GCDX). The XIS found many emission lines in the GCDX near the energy of K-shell transitions of iron and nickel. …
Near-Infrared and Mid-Infrared Spectroscopy with the Infrared Camera (IRC) for AKARI
Pearson, C. P.; Ohyama, Y.; Takagi, T. +22 more
The Infrared Camera (IRC) is one of the two instruments on board the AKARI satellite. In addition to deep imaging from 1.8 to 26.5 ×
The Suzaku High Resolution X-Ray Spectrometer
Ishida, Manabu; Kelley, Richard L.; Kilbourne, Caroline A. +41 more
The X-Ray Spectrometer (XRS) has been designed to provide the Suzaku Observatory with non-dispersive, high-resolution X-ray spectroscopy. As designed, the instrument covers the energy range 0.3 to 12keV, which encompasses the most diagnostically rich part of the X-ray band. The sensor consists of a 32-channel array of X-ray microcalorimeters, each…
Fine-Scale Structures of the Evershed Effect Observed by the Solar Optical Telescope aboard Hinode
Shimojo, Masumi; Tsuneta, Saku; Shimizu, Toshifumi +10 more
The small-scale structure of the Evershed effect is being studied using data obtained by the Spectropolarimeter and the Broadband Filter Imager of the Solar Optical Telescope aboard Hinode. We find that the Evershed flow starts at the leading edge of inwardly migrating bright penumbral grains, and turns to nearly a horizontal flow preferentially i…
Suzaku Observations of the Local and Distant Hot ISM
Hamaguchi, Kenji; Ishida, Manabu; Kilbourne, Caroline A. +18 more
Suzaku observed the molecular cloud MBM 12 and a blank field less than 3° away to separate the local and distant components of the diffuse soft X-ray background. Towards MBM 12, a local (D ≲ 275 pc) O VII emission line was clearly detected with an intensity of 3.5 photons cm-2 s-1 sr-1 (or line units, LU), and the …
Flare Ribbons Observed with G-band and Fe I 6302Å, Filters of the Solar Optical Telescope on Board Hinode
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +11 more
The Solar Optical Telescope (SOT) on board the Hinode satellite observed an X3.4 class flare on 2006 December 13. A typical two-ribbon structure was observed, not only in the chromospheric CaII H line, but also in the G-band and FeI 6302Å line. The high-resolution, seeing-free images achieved by SOT revealed, for the first time, sub-arcsec fine st…