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arXiv · 1003.3790

The AKARI FU-HYU galaxy evolution program: First results from the GOODS-N field

C. P. Pearson·S. Serjeant·M. Negrello·T. Takagi·W. -S. Jeong·H. Matsuhara·T. Wada·S. Oyabu·H. M. Lee·M. S. Im
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Abstract

The AKARI FU-HYU mission program carried out mid-infrared imaging of several well studied Spitzer fields preferentially selecting fields already rich in multi-wavelength data from radio to X-ray wavelengths filling in the wavelength desert between the Spitzer IRAC and MIPS bands.We present the initial results for the FU-HYU survey in the GOODS-N field.We utilize the supreme multiwavelength coverage in the GOODS-N field to produce a multiwavelength catalogue from infrared to ultraviolet wavelengths, containing more than 4393 sources, including photometric redshifts. Using the FU-HYU catalogue we present colour-colour diagrams that map the passage of PAH features through our observation bands. We find that the longer mid-infrared bands from AKARI (IRC-L18W 18 micron band) and Spitzer (MIPS24 24 micron band) provide an accurate measure of the total MIR emission of the sources and therefore their probable total mid-infrared luminosity. We also find that colours incorporating the AKARI IRC-S11 11 micron band produce a bimodal distribution where an excess at 11 microns preferentially selects moderate redshift star-forming galaxies. These powerful colour-colour diagnostics are further used as tools to extract anomalous colour populations, in particular a population of Silicate Break galaxies from the GOODS-N field showing that dusty starbursts can be selected of specific redshift ranges (z=1.2 - 1.6) by mid-infrared drop-out techniques. The FU-HYU catalogue will be made publically available to the astronomical community.

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C. P. Pearson, S. Serjeant, M. Negrello, T. Takagi, W. -S. Jeong, H. Matsuhara, T. Wada, S. Oyabu, H. M. Lee, M. S. Im. 2010-03-15. The AKARI FU-HYU galaxy evolution program: First results from the GOODS-N field. https://doi.org/10.1051/0004-6361/200913383

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