Search Publications
Properties of Newly Formed Dust by SN 2006JC Based on Near- to Mid-Infrared Observation With AKARI
Tanaka, M.; Ohyama, Y.; Matsuhara, H. +18 more
We present our latest results on near- to mid-infrared (MIR) observation of supernova (SN) 2006jc at 200 days after the discovery using the Infrared Camera (IRC) on board AKARI. The near-infrared (2-5 µm) spectrum of SN 2006jc is obtained for the first time and is found to be well interpreted in terms of the thermal emission from amorphous c…
Calibration and Performance of the AKARI Far-Infrared Surveyor (FIS) -- Slow-Scan Observation Mode for Point-Sources
Nakagawa, Takao; Shirahata, Mai; Hasegawa, Sunao +11 more
We present the characterization and calibration of the Slow-Scan observation mode of the Far-Infrared Surveyor (FIS) onboard the AKARI satellite. The FIS, one of the two focal-plane instruments on AKARI, has four photometric bands between 50--180µm with two types of Ge:Ga array detectors. In addition to the All-Sky Survey, FIS has also taken…
North Ecliptic Pole Wide Field Survey of AKARI: Survey Strategy and Data Characteristics
Kim, Seong Jin; Nakagawa, Takao; Oyabu, Shinki +10 more
We present the survey strategy and the data characteristics of the North Ecliptic Pole (NEP) Wide Survey of AKARI. The survey was carried out for about one year starting from 2006 May with 9 passbands from 2.5 to 24µm and the areal coverage of about 5.8degree² centered on NEP. The survey depth reaches to 21.8 AB magnitude near infrared (NIR)…
AKARI Detection of Far-Infrared Dust Emission in the Halo of NGC 253
Onaka, Takashi; Yamagishi, Mitsuyoshi; Kaneda, Hidehiro +1 more
We present new far-infrared (FIR) images of the edge-on starburst galaxy NGC 253 obtained with the Far-Infrared Surveyor (FIS) onboard AKARI at wavelengths of 90 µm and 140 µm. We have clearly detected FIR dust emission extended in the halo of the galaxy; there are two filamentary emission structures extending from the galactic disk up…
AKARI observations of the ISM in our Galaxy and nearby galaxies
Takahashi, H.; Onaka, T.; Kaneda, H. +1 more
With AKARI, we have systematically performed near- to far-infrared (NIR-FIR) observations of the interstellar medium (ISM) in our Galaxy and nearby galaxies as one of AKARI mission programs called ISMGN (ISM in our Galaxy and Nearby galaxies). Our scientific objective is to increase our knowledge on the properties of the ISM exposed to an extensiv…
AKARI Infrared Observations of the Supernova Remnant G292.0+1.8: Unveiling Circumstellar Medium and Supernova Ejecta
Onaka, Takashi; Jeong, Woong-Seob; Koo, Bon-Chul +6 more
We present the results of AKARI observations of the O-rich supernova remnant (SNR) G292.0+1.8 using six Infrared Camera (IRC) and four Far-Infrared Surveyor bands covering 2.7-26.5 µm and 50-180 µm, respectively. The AKARI images show two prominent structures; a bright equatorial ring (ER) structure along the east-west direction and an…
Photometric redshift accuracy in AKARI deep surveys
Im, M.; Lee, H. M.; Burgarella, D. +11 more
We investigate the photometric redshift accuracy achievable with the AKARI infrared data in deep multiband surveys, such as in the North Ecliptic Pole field. We demonstrate that the passage of redshifted polycyclic aromatic hydrocarbons (PAH) and silicate features into the mid-infrared wavelength window covered by AKARI is a valuable means to reco…
Infrared Studies of Molecular Shocks in the Supernova Remnant HB21. I. Thermal Admixture of Shocked H2 Gas in the North
Koo, Bon-Chul; Lee, Ho-Gyu; Moon, Dae-Sik +2 more
We present near- and mid-infrared observations on the shock-cloud interaction region in the northern part of the supernova remnant HB21, performed with the infrared camera (IRC) aboard the AKARI satellite and the wide-field infrared camera (WIRC) at the Palomar 5 m telescope. The IRC 7 µm (S7), 11 µm (S11), and 15 µm (L15) band i…
The Mid-infrared View of Red Sequence Galaxies in Abell 2218 with AKARI
Goto, Tomotsugu; Kim, Seong Jin; Smail, Ian +16 more
We present the AKARI Infrared Camera (IRC) imaging observation of early-type galaxies (ETGs) in A2218 at zsime 0.175. Mid-infrared (MIR) emission from ETGs traces circumstellar dust emission from asymptotic giant branch (AGB) stars or/and residual star formation. Including the unique imaging capability at 11 and 15 µm, our AKARI data provide…
Hot Debris Dust Around HD 106797
Nakagawa, Takao; Onaka, Takashi; Ootsubo, Takafumi +10 more
Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 µm, which is best attributed to hot circumstellar debris dust surrounding the star. The temperature of the debris dust is derived as T d ~ 190 K by ass…