Search Publications
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
Swift and Suzaku Observations of the X-Ray Afterglow from the GRB 060105
Maeda, Yoshitomo; Kelley, Richard L.; Yamaoka, Kazutaka +34 more
Results are presented of early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The bright, long gamma-ray burst GRB 060105 triggered the Swift Burst Alert Telescope at 06:49:28 on 2006 January 5 (T0). The Suzaku team commenced a pre-planned target of opportunity observation at 19ks (5.3hr) after the Swift trigger. The X-…
Two-Step Reconnections in a C3.3 Flare and Its Preflare Activity Observed by Hinode XRT
Chae, Jongchul; Kim, Sujin; Kim, Yeon-Han +4 more
We investigated the evolution of a C3.3 impulsive flare and its preflare activity, which occurred in NOAA Active Region 10923 on 2006 November 12, using Hinode X-Ray Telescope (XRT) data. For an extensive investigation, we also used GOES X-ray flux, TRACE 171Å, and SOHO MDI data. Examining the time-series of the XRT and TRACE images, we can identi…
An On-Orbit Determination of the On-Axis Point Spread Function of the Hinode X-Ray Telescope
Golub, Leon; Narukage, Noriyuki; Sakao, Taro +5 more
The Hinode X-ray Telescope provides unprecedented observations of the solar corona in X-rays, due in part to its fine resolution. The X-ray point spread function (PSF) was measured before launch at the NASA X-ray Calibration Facility to have a FWHM of 0.8''. This paper describes the work to verify the PSF measurements using on-orbit observations o…
Far-Infrared Distributions in Nearby Spiral GalaxiesNGC 2841 and NGC 2976 Observed with AKARI/Far-Infrared Surveyor (FIS)
Serjeant, S.; Nakagawa, T.; Okada, Y. +9 more
Far-infrared (IR) images of the nearby Sb galaxy NGC 2841 and the Sc galaxy NGC 2976 at wavelengths of 65, 90, 140, and 160 ∼ bridge in the M 81/M 82 group that NGC 2976 belongs to. By taking advantage of a wealth of the far-IR bands of the FIS, it has been demonstrated that the spectral energy distribution of NGC 2841 is spatially more variable t…
Center-to-Limb Variation of Stokes V Asymmetries in Solar Pores Observed with the Hinode Spectro-Polarimeter
Tsuneta, Saku; Shimizu, Toshifumi; Kubo, Masahito +10 more
Here we present spectro-polarimetric measurements of several pores and the surrounding regions taken with the Solar Optical Telescope aboard Hinode at various viewing angles. We analyzed the Stokes V area asymmetry, and confirmed that it is depressed at the center of the pores, while it shows large positive values (a blue lobe larger than a red lo…
Detection of an Hα Emission Line on a Quasar, RX J1759.4+6638, at z = 4.3 with AKARI
Ohyama, Y.; Takagi, T.; Matsuhara, H. +18 more
We report on the detection of an Hα) is consistent with those of previous reports for lower-redshift quasars.