Search Publications
The AKARI/IRC mid-infrared all-sky survey
García-Lario, P.; Müller, T. G.; Ohyama, Y. +30 more
Context. AKARI is the first Japanese astronomical satellite dedicated to infrared astronomy. One of the main purposes of AKARI is the all-sky survey performed with six infrared bands between 9 µm and 200 µm during the period from 2006 May 6 to 2007 August 28. In this paper, we present the mid-infrared part (9 µm and 18 µm b…
Evolution of dust temperature of galaxies through cosmic time as seen by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +112 more
We study the dust properties of galaxies in the redshift range 0.1 <~ z <~ 2.8 observed by the Herschel Space Observatory in the field of the Great Observatories Origins Deep Survey-North as part of the PACS Extragalactic Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) key programmes. Infrared (IR) luminosity (LIR
AKARI IRC Infrared 2.5-5 µm Spectroscopy of a Large Sample of Luminous Infrared Galaxies
Nakagawa, Takao; Shirahata, Mai; Imanishi, Masatoshi +2 more
We present the results of our systematic infrared 2.5-5 µm spectroscopy of 60 luminous infrared galaxies (LIRGs) with infrared luminosities L IR = 1011-1012 L sun and 54 ultraluminous infrared galaxies (ULIRGs) with L IR >= 1012 L sun, using the AKARI Infrared Ca…
Strengthening the Case for Asteroidal Accretion: Evidence for Subtle and Diverse Disks at White Dwarfs
Zuckerman, B.; Jura, M.; Farihi, J. +1 more
Spitzer Space Telescope IRAC 3-8 µm and AKARI IRC 2-4 µm photometry are reported for 10 white dwarfs with photospheric heavy elements; nine relatively cool stars with photospheric calcium and one hotter star with a peculiar high carbon abundance. A substantial infrared excess is detected at HE 2221-1630, while modest excess emissions a…
Panoramic Hα and mid-infrared mapping of star formation in a z = 0.8 cluster
Shimasaku, Kazuhiro; Koyama, Yusei; Kodama, Tadayuki +4 more
We present the first wide-field Hα imaging survey around the distant cluster RXJ1716.4+6708 at z = 0.81 with a narrow-band filter on MOIRCS/Subaru, which reveals the star formation activities down to a star formation rate (SFR) of ~1Msolaryr-1 without extinction correction. Combining with a wide-field mid-infrared (MIR) imagi…
Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field. Revealing the cosmic star formation history hidden by dust
Le Floc'h, E.; Im, M.; Lee, H. M. +19 more
Aims: Dust-obscured star-formation increases with increasing intensity and increasing redshift. We aim to reveal the cosmic star-formation history obscured by dust using deep infrared observation with AKARI.
Methods: We constructed restframe 8 µm, 12 µm, and total infrared (TIR) luminosity functions (LFs) at 0.15 < z < …
Near-IR integral field spectroscopy of ionizing stars and young stellar objects on the borders of H II regions
Martins, F.; Zavagno, A.; Bouret, J. C. +2 more
Aims: We study three Galactic H ii regions - RCW 79, RCW 82, and RCW 120 - where triggered star formation is taking place. Two stellar populations are observed: the ionizing stars of each H ii region and young stellar objects on their borders. Our goal is to show that they represent two distinct populations, as expected from successive star-f…
Neptune's atmospheric composition from AKARI infrared spectroscopy
Fletcher, L. N.; Encrenaz, T.; Burgdorf, M. +2 more
Aims: Disk-averaged infrared spectra of Neptune between 1.8 and 13 µm, obtained by the AKARI infrared camera (IRC) in May 2007, have been analysed to (a) determine the globally-averaged stratospheric temperature structure; (b) derive the abundances of stratospheric hydrocarbons; and (c) detect fluorescent emission from CO at 4.7 µ…
Star formation and dust extinction properties of local galaxies from the AKARI-GALEX all-sky surveys . First results from the most secure multiband sample from the far-ultraviolet to the far-infrared
Buat, V.; Burgarella, D.; Takeuchi, T. T. +5 more
Aims: We explore spectral energy distributions (SEDs), star formation (SF), and dust extinction properties of galaxies in the Local Universe.
Methods: The AKARI all-sky survey provided the first bright point source catalog detected at 90 µm. Beginning with this catalog, we selected galaxies by matching the AKARI sources with those …
AKARI and BLAST Observations of the Cassiopeia A Supernova Remnant and Surrounding Interstellar Medium
Ade, P. A. R.; Bock, J. J.; Martin, P. G. +30 more
We use new large area far infrared maps ranging from 65 to 500 µm obtained with the AKARI and the Balloon-borne Large Aperture Submillimeter Telescope missions to characterize the dust emission toward the Cassiopeia A supernova remnant (SNR). Using the AKARI high-resolution data we find a new "tepid" dust grain population at a temperature of…