Search Publications
Systematic Infrared 2.5-5 µm Spectroscopy of Nearby Ultraluminous Infrared Galaxies with AKARI
Nakagawa, Takao; Shirahata, Mai; Imanishi, Masatoshi +4 more
We report on the results of systematic infrared 2.5-5 µm spectroscopy of 45 nearby ultraluminous infrared galaxies (ULIRGs) at z < 0.3 using AKARI IRC. This paper investigates whether the luminosities of these ULIRGs are dominated by starburst activity, or alternatively, whether optically elusive buried active galactic nuclei (AGNs) are e…
AKARI/IRC Deep Survey in the North Ecliptic Pole Region
Goto, Tomotsugu; Oyabu, Shinki; Ohyama, Youichi +10 more
We have made adeep and wide imaging survey with all nine AKARI/IRC bands from 2 to 24 µm within ahalf degree of the North Ecliptic Pole. The survey covered acircular area of 0.38deg2 centered at RA = 17h56m, Dec = 66°37' where adeep optical multi-band survey has been conducted by Subaru/Suprime-Cam. The 5σ se…
Absolute Photometric Calibration of the Infrared Camera (IRC) aboard AKARI
Oyabu, Shinki; Ohyama, Youichi; Onaka, Takashi +11 more
The absolute photometric calibration of imaging observations with the Infrared Camera (IRC) aboard the AKARI satellite was performed by monitoring the same stars regularly and by observing aset of standard stars. By our monitoring observations, we confirmed that all channels of the IRC were stable to within 4% and that their sensitivities were con…
AKARI/FIS Mapping of the ISM-Wind Bow Shock around α Orionis
Yamamura, Issei; Matsunaga, Noriyuki; Mito, Hiroyuki +7 more
We present 10' × 50'scan maps around an M supergiant αOri at 65, 90, 140, and 160µm obtained with the AKARI Infrared Astronomy Satellite. Higher spatial resolution data with the exact analytic solution permit us to fit the de-projected shape of the stellar-wind bow shock around αOri to have a stand-off distance of 4'.8, position angle of 55°…
Albedo, Size, and Surface Characteristics of Hayabusa-2 Sample-Return Target 162173 1999 JU3 from AKARI and Subaru Observations
Müller, T. G.; Wada, T.; Ita, Y. +7 more
AKARI IRC Survey of the Large Magellanic Cloud: Outline of the Survey and Initial Results
Hasegawa, Tetsuo; Onaka, Takashi; Tamura, Motohide +13 more
We observed an area of 10deg2 of the Large Magellanic Cloud using the Infrared Camera (IRC) on board AKARI. The observations were carried out using five imaging filters (3, 7, 11, 15, and 24µm) and adispersion prism (2-5µm, λ / Δλ sim 20) equipped in the IRC. This paper describes an outline of our survey project, and present…
Supernova Remnants in the AKARI IRC Survey of the Large Magellanic Cloud
Onaka, Takashi; Ita, Yoshifusa; Seok, Ji Yeon +9 more
We present a near- to mid-infared study of supernova remnants (SNRs) using the AKARI IRC Survey of the Large Magellanic Cloud (LMC). The LMC survey observed about a10 square degree area of the LMC in five bands centered at 3, 7, 11, 15, and 24 µm using the Infrared Camera (IRC) aboard AKARI. The number of SNRs in the survey area is 21, which…
Far-Infrared Properties of Blue Compact Dwarf Galaxies Observed with AKARI/Far-Infrared Surveyor (FIS)
Onaka, Takashi; Kaneda, Hidehiro; Suzuki, Toyoaki +1 more
We report on the basic far-infrared (FIR) properties of eight blue compact dwarf galaxies (BCDs) observed by AKARI. We have measured the fluxes at the four FIS bands (wavelengths of 65 µm, 90 µm, 140 µm, and 160 µm). Based on these fluxes, we have estimated basic quantities of dust: dust temperature, dust mass, and total FI…
Performance of an Imaging Fourier Transform Spectrometer with Photoconductive Detector Arrays: An Application for the AKARI Far-Infrared Instrument
Nakagawa, Takao; Shirahata, Mai; Doi, Yasuo +10 more
We have developed an imaging Fourier transform spectrometer (FTS) for space-based far-infrared astronomical observations. The FTS employs newly developed photoconductive detector arrays with acapacitive trans-impedance amplifier, which makes the FTS acompletely unique instrument. The FTS was installed as afunction of the far-infrared instrument (F…
Galaxy Clusters at 0.9 < z < 1.7 in the AKARI NEP Deep Field
Goto, Tomotsugu; Inami, Hanae; Nakagawa, Takao +11 more
There is ahuge gap between the properties of red-sequence selected massive galaxy clusters at z < 1 and Lyman-break selected proto-clusters at z > 3. It is important to understand when and how the z > 3 proto-clusters evolve into passive clusters at z < 1. We aim to fill this cluster desert by using space-based N4 (4 µm) imaging …