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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…

AKARI Detection of the Infrared-Bright Supernova Remnant B0104-72.3 in the Small Magellanic Cloud

Lee, H. M.; Jeong, W. -S.; Lee, M. G. +12 more

We present a serendipitous detection of the infrared-bright supernova remnant (SNR) B0104-72.3 is a middle-aged SNR interacting with molecular clouds, similar to the Galactic SNR IC 443. Our results highlight the potential of AKARI IRC observations in studying SNRs, especially for diagnosing SNR shocks.

The Complex Structure of the Mg II λλ 2795.523, 2802.698 Å Regions of 64 Be Stars

Lyratzi, Evaggelia; Danezis, Emmanouel; Popovic, Luka C. +3 more

Here we consider the presence of absorption components shifted to the violet or red side of the main spectral line (satellite or discrete absorption components, i.e., SACs or DACs) in the regions of the Mg II resonance lines in Be stars as well as their kinematical characteristics. Namely, our objective is to check whether there exists a common ph…

AKARI Far-Infrared Source Counts in the Lockman Hole

Pearson, C. P.; Takagi, T.; Jeong, W. -S. +8 more

We report initial results of far-infrared observations of the Lockman Hole with Far-Infrared Surveyor onboard the AKARI infrared satellite. On the basis of slow-scan observations of a 0°.6 × 1°.2 contiguous area, we obtained source number counts at 65, 90, and 140 µm counts above 26 mJy account for about 7% of the cosmic background. These re…

Response of the Solar Atmosphere to Magnetic Flux Emergence from Hinode Observations

Tsuneta, Saku; Shibasaki, Kiyoto; Li, Hui +14 more