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http://dx.doi.org/10.5303/PKAS.2017.32.1.063

SMALL-SCALE STRUCTURE OF THE ZODIACAL DUST CLOUD OBSERVED IN FAR-INFRARED WITH AKARI  

Ootsubo, Takafumi (Graduate School of Arts and Sciences, The University of Tokyo)
Doi, Yasuo (Graduate School of Arts and Sciences, The University of Tokyo)
Takita, Satoshi (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Matsuura, Shuji (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Kawada, Mitsunobu (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Nakagawa, Takao (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Arimatsu, Ko (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Tanaka, Masahiro (Center for Computational Sciences, University of Tsukuba)
Kondo, Toru (Graduate School of Science, Nagoya University)
Ishihara, Daisuke (Graduate School of Science, Nagoya University)
Usui, Fumihiko (Graduate School of Science, The University of Tokyo)
Hattori, Makoto (Astronomical Institute, Tohoku University)
Publication Information
Publications of The Korean Astronomical Society / v.32, no.1, 2017 , pp. 63-65 More about this Journal
Abstract
The zodiacal light emission is the thermal emission from the interplanetary dust and the dominant diffuse radiation in the mid- to far-infrared wavelength region. Even in the far-infrared, the contribution of the zodiacal emission is not negligible at the region near the ecliptic plane. The AKARI far-infrared all-sky survey covered 97% of the whole sky in four photometric bands with band central wavelengths of 65, 90, 140, and $160{\mu}m$. AKARI detected the small-scale structure of the zodiacal dust cloud, such as the asteroidal dust bands and the circumsolar ring, in far-infrared wavelength region. Although the most part of the zodiacal light structure in the AKARI far-infrared all-sky image can be well reproduced with the DIRBE zodiacal light model, there are discrepancies in the small-scale structures. In particular, the intensity and the ecliptic latitude of the peak position of the asteroidal dust bands cannot be reproduced precisely with the DIRBE models. The AKARI observational data during more than one year has advantages over the 10-month DIRBE data in modeling the full-sky zodiacal dust cloud. The resulting small-scale zodiacal light structure template has been used to subtract the zodiacal light from the AKARI all-sky maps.
Keywords
surveys; interplanetary medium; zodiacal dust; infrared: diffuse background;
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Times Cited By KSCI : 1  (Citation Analysis)
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