AKARI far-infrared maps of the zodiacal dust bands

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 $\mu$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 dust-band structures in the AKARI far-IR all-sky maps and construct template maps of the asteroidal dust bands and the circumsolar ring components based on the AKARI far-IR maps. In the maps, $\pm 1.4°$, $\pm 2.1°$ and $\pm 10°$ asteroidal dust-band structures are detected in the 65 $\mu$m and 90 $\mu$m bands. A possible $\pm 17°$ band may also have been detected. No evident dust-band structures are identified in either the 140 $\mu$m or the 160 $\mu$m bands. By subtracting the dust-band templates constructed in this paper, we can achieve a similar level of flux calibration of the AKARI far-IR all-sky maps in the $|\beta |<40°$ region to that in the region for $|\beta |>40°$.

arXiv comment27 pages, 10 figures, and 3 tables, accepted for publication in PASJ

References in corpus (23)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Infrared Astronomical Mission AKARI
• Planck 2013 results. XI. All-sky model of thermal dust emission
• The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background: I. Limits and Detections
• The AKARI/IRC Mid-Infrared All-Sky Survey
• Extrapolation of Galactic Dust Emission at 100 Microns to CMBR Frequencies Using FIRAS
• Cometary Origin of the Zodiacal Cloud and Carbonaceous Micrometeorites
• The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background: II. Model of the Interplanetary Dust Cloud
• The Infrared Camera (IRC) for AKARI - Design and Imaging Performance
• The Far-Infrared Surveyor (FIS) for AKARI
• Infrared Emission from the Radio Supernebula in NGC 5253: A Proto-Globular Cluster?
• Angular Power Spectra of the COBE DIRBE Maps
• Planck 2013 results. XIV. Zodiacal emission
• The formation of Encke meteoroids and dust trail
• The Size-Frequency Distribution of the Zodiacal Cloud: Evidence from the Solar System Dust Bands
• An improved model for the infrared emission from the zodiacal dust cloud: cometary, asteroidal and interstellar dust
• The $AKARI$ Far-Infrared All-Sky Survey Maps
• Clementine Observations of the Zodiacal Light and the Dust Content of the Inner Solar System
• A Full-sky, High-resolution Atlas of Galactic 12 micron Dust Emission with WISE
• Calibration of the AKARI Far-infrared All Sky Survey Maps
• Modeling of the zodiacal emission for the AKARI/IRC mid-infrared all-sky diffuse maps
• Point source calibration of the AKARI/FIS all-sky survey maps for staking analysis

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• Hi-GAL, the Herschel infrared Galactic Plane Survey: photometric maps and compact source catalogues. First data release for Inner Milky Way: +68°> l > -70°
• Cosmoglobe: Simulating zodiacal emission with ZodiPy
• Heliocentric Distance Dependence of Zodiacal Light Observed by Hayabusa2#
• Mid-infrared spectroscopy of zodiacal emission with AKARI/IRC