The zodiacal light emission is the thermal emission from the interplanetary dust and the dominant diuse 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 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 repro- duced 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.

ABSTRACT
1. INTRODUCTION
2. SMALL-SCALE STRUCTURE OF THE ZL IN FAR-IR
3. STRUCTURE OF ASTEROIDAL DUST BANDS
4. RESULTS AND FUTREU WORKS
REFERENCES

• Makoto Hattori(Astronomical Institute, Tohoku University)
• Fumihiko Usui(Graduate School of Science, The University of Tokyo)
• Daisuke Ishihara(Graduate School of Science, Nagoya University)
• Toru Kondo(Graduate School of Science, Nagoya University)
• Masahiro Tanaka(Center for Computational Sciences, University of Tsukuba)
• Ko Arimatsu(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency/Graduate School of Science, The University of Tokyo)
• Takao Nakagawa(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Mitsunobu Kawada(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Shuji Matsuura(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Satoshi Takita(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Yasuo Doi(Graduate School of Arts and Sciences, The University of Tokyo)
• Takafumi Ootsubo(Graduate School of Arts and Sciences, The University of Tokyo)