AKARI/IRC Broadband Mid-Infrared Data as an Indicator of the Star-Formation Rate
Buat, Véronique; Burgarella, Denis; Murata, Katsuhiro L.; Takeuchi, Tsutomu T.; Yuan, Fang-Ting; Iglesias-Páramo, Jorge; Heinis, Sébastien; Giovannoli, Elodie
Japan, France, Spain
Abstract
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 fluxes were obtained from AKARI diffuse maps to correct an underestimation for extended sources raised by the point-spread function photometry. SFRs of these galaxies were derived by the spectral energy distribution fitting program CIGALE. In spite of complicated features contained in these bands, both the S9W and L18W emission correlate with the SFR of galaxies. The SFR calibrations using S9W and L18W are presented for the first time. These calibrations agree well with previous works based on Spitzer data within the scatters, and should be applicable to dust-rich galaxies.