Search Publications
The Temperature and Density Structure of an Active Region Observed with the Extreme-Ultraviolet Imaging Spectrometer on Hinode
Warren, Harry P.; Doschek, George A.; Young, Peter R. +5 more
The Extreme-Ultraviolet Imaging Spectrometer (EIS) on Hinode produces high resolution spectra that can be combined via rasters into monochromatic images of solar structures, such as active regions. Electron temperature and density maps of the structures can be obtained by imaging the structures in different spectral lines with ratios sensitive to …
On Connecting the Dynamics of the Chromosphere and Transition Region with Hinode SOT and EIS
Harra, Louise K.; Warren, Harry P.; Hara, Hirohisa +14 more
We use coordinated Hinode SOT/EIS observations that include high-resolution magnetograms, chromospheric, and transition region (TR) imaging, and TR/coronal spectra in a first test to study how the dynamics of the TR are driven by the highly dynamic photospheric magnetic fields and the ubiquitous chromospheric waves. Initial analysis shows that the…
Spatial Distributions of Cold and Warm Interstellar Dust in M101 Resolved with AKARI/Far-Infrared Surveyor (FIS)
Nakagawa, T.; Okada, Y.; Kaneda, H. +2 more
The nearby face-on spiral galaxy M101 has been observed with the Far-Infrared Surveyor onboard AKARI. The far-infrared four-band images reveal fine spatial structures of M101, which include global spiral patterns, giant HII regions embedded in outer spiral arms, and a bar-like feature crossing the center. The spectral energy distribution of the wh…
Formation of Moving Magnetic Features and Penumbral Magnetic Fields with Hinode/SOT
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +10 more
Vector magnetic fields of moving magnetic features (MMFs) were well observed with the Solar Optical Telescope (SOT) aboard the Hinode satellite. We focused on the evolution of three MMFs with the SOT in this study. We found that an MMF having relatively vertical fields with the same polarity as the sunspot was detached from the penumbra around the…
The Far-Infrared Properties of Spatially Resolved AKARI Observations
Lee, H. M.; White, G. J.; Wang, L. +31 more
We present spatially resolved observations of IRAS sources from the Japanese infrared astronomy satellite AKARI All-Sky Survey during the performance verification phase of the mission. We extracted reliable point sources matched with the IRAS point source catalogue. By comparing IRAS and AKARI fluxes, we found that the flux measurements of some IR…
Magnetic Feature and Morphological Study of X-Ray Bright Points with Hinode
Golub, Leon; Sakao, Taro; Tsuneta, Saku +8 more
We observed X-ray bright points (XBPs) in a quiet region of the Sun with the X-Ray Telescope (XRT) aboard the Hinode satellite on 2006 December 19. XRT's high-resolution X-ray images revealed many XBPs with complicated structure and evolving dramatically with time. Almost all of the dynamic eruptions in the quiet region were composed of XBPs, and …
Temperature and Density Structures of Solar Corona, A Test of Iron Line Diagnostic Capability of EIS Instrument on Board Hinode
Harra, Louise K.; Doschek, George A.; Hara, Hirohisa +4 more
Increased diagnostic capability of the EUV Imaging Spectrometer (EIS) aboard Hinode (former Solar-B) has been demonstrated with a set of iron emission lines emerging in the two EIS observing wavelength bands (170-210Å and 250-290Å) and their line-intensity ratios. ``Abundance-uncertainty'' free relative emission measure distributions as a function…
Hinode EUV Imaging Spectrometer Observations of Active Region Loop Morphology: Implications for Static Heating Models of Coronal Emission
Warren, Harry P.; Ugarte-Urra, Ignacio; Brooks, David H. +2 more
Theoretically, magnetic fields are expected to expand as they rise above the photosphere and into the corona, so the apparent uniform cross-sections of active region loops are difficult to understand. There has been some debate as to whether coronal loops really have constant cross-sections, or are actually unresolved and composed of expanding thr…
Optical Identification of 15 µm Sources in the AKARI Performance Verification Field toward the North Ecliptic Pole
Im, M.; Lee, H. M.; Inami, H. +28 more
We present the results of optical identifications for 257 mid-infrared sources detected with a deep 15K_{s}
A Suzaku Observation of the Low-Ionization Fe-Line Emission from RCW 86
Petre, Robert; Kilbourne, Caroline A.; Kokubun, Motohide +14 more
The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant RCW 86 in 2006 February to study the nature of the 6.4keV emission line first detected with the Advanced Satellite for Cosmology and Astronomy (ASCA). The new data confirm the existence of the line, localizing it for the first time; most of the…