Search Publications
Suzaku Observation of the Metallicity in the Interstellar Medium of NGC 4258
Isobe, Naoki; Gandhi, Poshak; Sato, Kosuke +7 more
The Suzaku X-ray satellite observed the nearby spiral galaxy NGC 4258 for a total good exposure time of 100 ks. We present an analysis of the Suzaku XIS data, in which we confirm that the 0.5-2 keV spectra of the interstellar medium (ISM) are well-represented by a two-temperature model. The cool and hot ISM temperatures are 0.23±0.01 and 0.58±0.01…
High-Resolution Near-Infrared Images of the T Tauri Binary System XZ Tauri
Pyo, Tae-Soo; Tamura, Motohide; Hayashi, Masahiko +8 more
We present a high-resolution (∼0.1'' = 14AU) H-band image of XZ Tau, a 0.3''-separated classical T Tauri binary system, taken with the Coronagraphic Imager with Adaptive Optics (CIAO) on the Subaru Telescope. We found a scattered light nebula extending to ∼2.4'' from the secondary, XZ Tau S, in the northeast region of the binary. Its surface brigh…
Suzaku Observations of SN 1987A
Haberl, Frank; Hasinger, Günther; Sturm, Richard +2 more
We report on Suzaku observations of SN1987A in the Large Magellanic Cloud, performed in 2005 November and 2006 June. The observations provide medium resolution X-ray spectra during the phase of the interaction between the supernova blast wave and the inner circumstellar ring. The Suzaku observations complement XMM-Newton and Chandra observations a…
AKARI Far-Infrared Spectroscopic Observations of the Galactic Center Region
Takahashi, H.; Nakagawa, T.; Okada, Y. +5 more
We have observed the Quintuplet- and Arches-cluster regions with the Fourier Transform Spectrometer (FTS) of the Far-Infrared Surveyor (FIS) aboard AKARI to investigate the physical conditions of interstellar matter around the clusters. The FIS-FTS mapping data reveal differences in the spatial distribution among the far-infrared [OIII], [NII], an…
A Super Bubble Candidate in the Galactic Center and a Local Enhancement G359.77-0.09
Mori, Hideyuki; Koyama, Katsuji; Nobukawa, Masayoshi +2 more
A 20' × 16' elliptical ring-like structure has been found near the Galactic center in the narrow energy band corresponding to the Kα line from He-like sulfur. In the ring, two diffuse sources are found, a supernova remnant candidate, G359.79-0.26, and an unidentified source, G359.77-0.09. The X-ray spectrum of G359.77-0.09 is similar to that of G3…
Deconvolution of Images Taken with the Suzaku X-Ray Imaging Spectrometer
Maeda, Yoshitomo; Kamae, Tuneyoshi; Sugizaki, Mutsumi
We present a non-iterative method to deconvolve the point spread function (PSF) from images taken with the Suzaku X-ray Imaging Spectrometer (XIS). The method is optimized for analyses of extended sources with high photon statistics. Suzaku has four XIS detectors, each with its own X-ray CCD and X-Ray Telescope (XRT), and has been providing opport…
Diffuse 18µ Emission around TYC 3159-6-1 Discovered by the AKARI MIR All-Sky Survey
Oyabu, Shinki; Onaka, Takashi; Takita, Satoshi +11 more
We report on observations of the mysterious object TYC 3159-6-1 located toward the Cygnus X region. It shows interesting characteristics in the AKARI mid-infrared All-Sky Survey. The central star is clearly detected as a point source at 9µ, while no point-like source, but a large shell-like structure is seen around the source at 18µ. T…
A Massive Disk Galaxy at z > 3 along the Line of Sight of QSO 1508+5714
Tanaka, Ichi; Yamada, Toru; Iye, Masanori +1 more
We have obtained deep images in the BVRIJHKs bands of the field centered on QSO 1508+5714 5714 (Zem = 4.28) with the Suprime-Cam, FOCAS, and MOIRCS cameras on Subaru telescope. We report here on the detection of a B-dropout galaxy, which is 3.5'' north-west of the QSO sightline. A photometric redshift analysis is presented to complement…