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Dusty Universe viewed by AKARI far infrared detector
- Source :
- EPS vol. 65 no. 10 pp. 1101-1108 2013
- Publication Year :
- 2013
-
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.<br />Comment: 8 pages, 7 figures, published in Earth, Planets and Space
Details
- Database :
- arXiv
- Journal :
- EPS vol. 65 no. 10 pp. 1101-1108 2013
- Publication Type :
- Report
- Accession number :
- edsarx.1310.8460
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.5047/eps.2013.06.005