Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F)

Details Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F) Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F)

2006-05-23

arxiv.org/abs/astro-ph/0605589v1

Publ.Astron.Soc.Jap. 58 (2006) 4

Astronomy and Astrophysics

Astrophysics

accepted for publication in Publications of the Astronomical Society of Japan Vol.58(4) (2006), 39 pages, 16 Postscript figure

Scientific paper

AKARI (formerly ASTRO-F) is an infrared space telescope designed for an all-sky survey at 10-180 (mu)m, and deep pointed surveys of selected areas at 2-180 (mu)m. The deep pointed surveys with AKARI will significantly advance our understanding of galaxy evolution, the structure formation of the Universe, the nature of the buried AGNs, and the cosmic infrared background. Here we describe the important characteristics of the AKARI mission: the orbit, and the attitude control system, and investigate the optimum survey area based on the updated pre-flight sensitivities of AKARI, taking into account the cirrus confusion noise as well as the surface density of bright stars. The North Ecliptic Pole (NEP) is concluded to be the best area for 2-26 (mu)m deep surveys, while the low-cirrus noise regions around the South Ecliptic Pole (SEP) are worth considering for 50-180 (mu)m pointed surveys to high sensitivities limited by the galaxy confusion noise. Current observational plans of these pointed surveys are described in detail. Comparing these surveys with the deep surveys with the Spitzer Space Telescope, the AKARI deep surveys are particularly unique in respect of their continuous wavelength coverage over the 2-26 (mu)m range in broad-band deep imaging, and their slitless spectroscopy mode over the same wavelength range.

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