Search Publications
Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
Oyabu, Shinki; Hasegawa, Sunao; Onaka, Takashi +10 more
We present the results of an unbiased asteroid survey in the mid-infrared wavelength region with the Infrared Camera (IRC) on board the Japanese infrared satellite AKARI. About 20% of the point source events recorded in the AKARI All-Sky Survey observations are not used for the IRC Point Source Catalog (IRC-PSC) in its production process because o…
Outflow in Overlooked Luminous Quasar: Subaru Observations of AKARI J1757+5907
Oyabu, Shinki; Matsuhara, Hideo; Toba, Yoshiki +5 more
We present Subaru observations of the newly discovered luminous quasar AKARI J1757+5907, which shows an absorption outflow in its spectrum. The absorption consists of 9 distinct troughs, and our analysis focuses on the troughs at ∼-1000 km s-1 for which we could measure accurate column densities of He I*, Fe II, and Mg II. We…
Widely Extended [O III] 88µm Line Emission around the 30 Doradus Region Revealed with AKARI FIS-FTS
Kaneda, Hidehiro; Takahashi, Hidenori; Murakami, Noriko +7 more
We present a distribution map of the far-infrared [O II] 88 µm line emission around the 30 Doradus (30 Dor) region in the Large Magellanic Cloud obtained with the Fourier Transform Spectrometer of the Far-Infrared Surveyor on board AKARI. The map reveals that the [O III] emission is widely distributed by more than 10' around the super star c…
AKARI/IRC Broadband Mid-Infrared Data as an Indicator of the Star-Formation Rate
Buat, Véronique; Burgarella, Denis; Murata, Katsuhiro L. +5 more
AKARI/Infrared Camera (IRC) Point Source Catalog provides a large amount of flux data at S9W (9µm) and L18W (18µm) bands. With the goal of constructing Star-Formation Rate (SFR) calculations using IRC data, we analyzed an IR selected GALEX-SDSS-2MASS-AKARI(IRC/Far-Infrared Surveyor) sample of 153 nearby galaxies. The far-infrared fluxe…
Properties of Dust and PAHs in the Hot Plasma of the Elliptical Galaxy NGC 4125 Revealed with AKARI and Spitzer Space Telescope
Oyabu, Shinki; Onaka, Takashi; Yamagishi, Mitsuyoshi +4 more
We present the spatial distributions of dust and polycyclic aromatic hydrocarbons (PAHs) in the elliptical galaxy NGC 4125, revealed by AKARI and Spitzer. NGC 4125 is relatively bright in dust and PAH emision for elliptical galaxies, although it certainly possesses diffuse interstellar hot plasma, indicated by the high spatial resolution X-ray dat…
Infrared Spectral Energy Distribution of Galaxies in the AKARI All Sky Survey: Correlations with Galaxy Properties, and Their Physical Origin
Takeuchi, Tsutomu T.; Makiya, Ryu; Totani, Tomonori +2 more
We have studied the properties of more than 1600 low-redshift galaxies by utilizing high-quality infrared flux measurements of the AKARI All-Sky Survey and physical quantities based on optical and 21-cm observations. Our goal is to understand the physics determining the infrared spectral energy distribution (SED). The ratio of the total infrared l…
A New Method of Dark-Current Estimation for Diffuse Sky Measurements with the AKARI Infrared Camera
Wada, Takehiko; Tsumura, Kohji
We developed a new method for estimating the dark current of near-infrared (NIR) data from the Infra-Red Camera (IRC) aboard the AKARI satellite. The existing method of dark-current estimation is insufficient because the dark current is enhanced by charged particles hitting the detector in the South Atlantic Anomaly (SAA). We could trace this dark…
Near-Infrared and X-Ray Observations of XSS J12270-4859
Ishida, Manabu; Gandhi, Poshak; Tsujimoto, Masahiro +5 more
XSS J12270