Dusty Universe viewed by AKARI far infrared detector

Abstract

We present the results of the analysis of multiwavelength Spectral Energy Distributions (SEDs) of far-infrared galaxies detected in the AKARI Deep Field-South (ADF--S) Survey. The analysis uses a carefully selected sample of 186 sources detected at the 90 $\mu$m AKARI band, identified as galaxies with cross-identification in public catalogues. For sources without known spectroscopic redshifts, we estimate photometric redshifts after a test of two independent methods: one based on using mainly the optical -- mid infrared range, and one based on the whole range of ultraviolet -- far infrared data. We observe a vast improvement in the estimation of photometric redshifts when far infrared data are included, compared with an approach based mainly on the optical -- mid infrared range. We discuss the physical properties of our far-infrared-selected sample. We conclude that this sample consists mostly of rich in dust and young stars nearby galaxies, and, furthermore, that almost 25% of these sources are (Ultra)Luminous Infrared Galaxies. Average SEDs normalized at 90 $\mu$m for normal galaxies (138 sources), LIRGs (30 sources), and ULIRGs (18 galaxies) a the significant shift in the peak wavelength of the dust emission, and an increasing ratio between their bolometric and dust luminosities which varies from 0.39 to 0.73.

8 pages, 7 figures, published in Earth, Planets and Space

References in corpus (7)

• Far-infrared Spectral Energy Distribution Fitting for Galaxies Near and Far
• An Ultraviolet-to-Radio Broadband Spectral Atlas of Nearby Galaxies
• Dust in starburst nuclei and ULIRGs: SED models for observers
• Spectral Energy Distributions of Local Luminous And Ultraluminous Infrared Galaxies
• Triggered or Self-Regulated Star Formation within Intermediate Redshift Luminous Infrared Galaxies (I). Morphologies and Spatially Resolved Spectral Energy Distributions
• A deep ATCA 20cm radio survey of the AKARI Deep Field South near the South Ecliptic Pole
• Properties of star forming galaxies in AKARI Deep Field-South

Cited by in corpus (3)

• [Ultra] Luminous Infrared Galaxies selected at 90 $\mu$m in the AKARI deep field: a study of AGN types contributing to their infrared emission
• Limited impact of jet induced feedback in the multi-phase nuclear interstellar medium of 4C12.50
• Relation of internal attenuation, dust emission, and the size of spiral galaxies. Calibration at low-z and how to use it as a cosmological test at high-z