Search Publications
Investigating the relation between CO (3-2) and far-infrared luminosities for nearby merging galaxies using ASTE
Kaneko, Hiroyuki; Muto, Takayuki; Ueda, Junko +10 more
We present the new single-dish CO (3-2) emission data obtained toward 19 early-stage and 7 late-stage nearby merging galaxies using the Atacama Submillimeter Telescope Experiment (ASTE). Combining with the single-dish and interferometric data of galaxies observed in previous studies, we investigate the relation between the CO (3-2) luminosity (L^'…
Mid- and far-infrared properties of Spitzer Galactic bubbles revealed by the AKARI all-sky surveys
Yamagishi, Mitsuyoshi; Kaneda, Hidehiro; Fukui, Yasuo +9 more
We have carried out a statistical study on the mid- and far-infrared (IR) properties of Galactic IR bubbles observed by Spitzer. Using the Spitzer 8 µm images, we estimated the radii and covering fractions of their shells, and categorized them into closed, broken, and unclassified bubbles with our data analysis method. Then, using the AKARI …
Revised wavelength and spectral response calibrations for AKARI near-infrared grism spectroscopy: Cryogenic phase
Nakagawa, Takao; Baba, Shunsuke; Isobe, Naoki +6 more
We perform revised spectral calibrations for the AKARI near-infrared grism to correct quantitatively for the effect of the wavelength-dependent refractive index. The near-infrared grism covering the wavelength range of 2.5-5.0 µm, with a spectral resolving power of 120 at 3.6 µm, is found to be contaminated by second-order light at wav…
Revised calibration for near- and mid-infrared images from ∼4000 pointed observations with AKARI/IRC
Onaka, Takashi; Yamamura, Issei; Usui, Fumihiko +3 more
The Japanese infrared astronomical satellite AKARI performed ∼4000 pointed observations for 16 months until the end of August 2007, when the telescope and instruments were cooled by liquid helium. Observation targets include solar system objects, Galactic objects, local galaxies, and galaxies at cosmological distances. We describe recent updates o…
Chemical evolution of the HC3N and N2H+ molecules in dense cores of the Vela C giant molecular cloud complex
Sanhueza, Patricio; Choi, Minho; Tatematsu, Ken'ichi +5 more
We have observed the HC3N(J = 10-9) and N2H+ (J = 1-0) lines toward the Vela C molecular clouds with the Mopra 22 m telescope to study the chemical characteristics of dense cores. The intensity distributions of these molecules are similar to each other at an angular resolution of 53″, corresponding to 0.19 pc, sugg…
AKARI far-infrared maps of the zodiacal dust bands
Nakagawa, Takao; Doi, Yasuo; Takita, Satoshi +6 more
Zodiacal emission is thermal emission from interplanetary dust. Its contribution to the sky brightness is non-negligible in the region near the ecliptic plane, even in the far-infrared (far-IR) wavelength regime. We analyze zodiacal emission observed by the AKARI far-IR all-sky survey, which covers 97% of the entire sky at arcminute-scale resoluti…
X-ray and infrared diagnostics of nearby active galactic nuclei with MAXI and AKARI
Nakagawa, Takao; Baba, Shunsuke; Isobe, Naoki +5 more
Nearby active galactic nuclei were diagnosed in the X-ray and mid-to-far infrared wavelengths with Monitor of All-sky X-ray Image (MAXI) and the Japanese infrared observatory AKARI, respectively. One hundred of the X-ray sources listed in the second release of the MAXI all-sky X-ray source catalog are currently identified as non-blazar-type active…
Image stacking analysis of SDSS galaxies with AKARI Far-Infrared Surveyor maps at 65 µm, 90 µm, and 140 µm
Doi, Yasuo; Takita, Satoshi; Ootsubo, Takafumi +4 more
We perform image stacking analysis of Sloan Digital Sky Survey (SDSS) photometric galaxies over the AKARI Far-Infrared Surveyor maps at 65 µm, 90 µm, and 140 µm. The resulting image profiles are decomposed into the central galaxy component (single term) and the nearby galaxy component (clustering term), as a function of the r-ban…