AKARI far-infrared maps of the zodiacal dust bands
Takafumi Ootsubo, Yasuo Doi, Satoshi Takita, Takao Nakagawa, Mitsunobu, Kawada, Yoshimi Kitamura, Shuji Matsuura, Fumihiko Usui, and Ko Arimatsu

TL;DR
This study utilizes AKARI far-infrared all-sky maps to analyze small-scale zodiacal dust structures, improving models of interplanetary dust emission and aiding in sky brightness calibration near the ecliptic plane.
Contribution
It constructs detailed templates of zodiacal dust bands from AKARI data, revealing structures at specific wavelengths and improving the accuracy of zodiacal emission models.
Findings
Detected small-scale dust-band structures at 65 and 90 μm.
Constructed templates for asteroidal dust bands and circumsolar ring.
Achieved flux calibration comparable to high ecliptic latitudes after dust subtraction.
Abstract
Zodiacal emission is thermal emission from interplanetary dust. Its contribution to the sky brightness is non-negligible in the region near the ecliptic plane, even in the far-infrared (far-IR) wavelength regime. We analyse zodiacal emission observed by the AKARI far-IR all-sky survey, which covers 97% of the entire sky at arcminute-scale resolution in four photometric bands, with central wavelengths of 65, 90, 140, and 160 m. AKARI detected small-scale structures in the zodiacal dust cloud, including the asteroidal dust bands and the circumsolar ring, at far-IR wavelengths. Although the smooth component of the zodiacal emission structure in the far-IR sky can be reproduced well by models based on existing far-IR observations, previous zodiacal emission models have discrepancies in the small-scale structures compared with observations. We investigate the geometry of the small-scale…
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