AcuA: the AKARI/IRC Mid-infrared Asteroid Survey

Details AcuA: the AKARI/IRC Mid-infrared Asteroid Survey AcuA: the AKARI/IRC Mid-infrared Asteroid Survey

2011-06-10

arxiv.org/abs/1106.1948v1

PASJ, 2011, Vol.63, No.5, pp.1117-1138

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

22 pages, 13 figures, and 11 tables, accepted for publication in PASJ

Scientific paper

We present the results of an unbiased asteroid survey in the mid-infrared wavelength with the Infrared Camera (IRC) onboard the Japanese infrared satellite AKARI. About 20% of the point source events recorded in the AKARI All-Sky Survey observations are not used for the IRC Point Source Catalog (IRC-PSC) in its production process because of the lack of multiple detection by position. Asteroids, which are moving objects on the celestial sphere, remain in these "residual events". We identify asteroids out of the residual events by matching them with the positions of known asteroids. For the identified asteroids, we calculate the size and albedo based on the Standard Thermal Model. Finally we have a brand-new catalog of asteroids, named the Asteroid Catalog Using Akari (AcuA), which contains 5,120 objects, about twice as many as the IRAS asteroid catalog. The catalog objects comprise 4,953 main belt asteroids, 58 near Earth asteroids, and 109 Jovian Trojan asteroids. The catalog will be publicly available via the Internet.

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