Low-Resolution Spectrum of the Zodiacal Light with AKARI InfraRed Camera

Abstract

We present the near- and mid-infrared zodiacal light spectrum obtained with the AKARI Infra-Red Camera (IRC). A catalog of 278 spectra of the diffuse sky covering a wide range of Galactic and ecliptic latitudes was constructed. The wavelength range of this catalog is 1.8-5.3 μm with wavelength resolution of λ/Δλ~20. Advanced reduction methods specialized for the slit spectroscopy of diffuse sky spectra are developed for constructing the spectral catalog. Based on the comparison analysis of the spectra collected in different seasons and ecliptic latitudes, we confirmed that the spectral shape of the scattered component and the thermal emission component of the zodiacal light in our wavelength range does not show any dependence on location and time, but relative brightness between them varies with location. We also confirmed that the color temperature of the zodiacal emission at 3-5 μm is 300+/-10 K at any ecliptic latitude. This emission is expected to be originated from sub-micron dust particles in the interplanetary space.

14 pages, 19 figures, accepted by Publications of the Astronomical Society of Japan (PASJ)

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Cited by in corpus (13)

• On the Origin of Near-Infrared Extragalactic Background Light Anisotropy
• Low-Resolution Spectrum of the Extragalactic Background Light with AKARI InfraRed Camera
• Origin of Interplanetary Dust through Optical Properties of Zodiacal Light
• Measurements of Diffuse Sky Emission Components in High Galactic Latitudes at 3.5 and 4.9 um Using DIRBE and WISE Data
• Measurements of the mean diffuse galactic light spectrum in the 0.95 μm to 1.65 μm band from CIBER
• Low-Resolution Spectrum of the Diffuse Galactic Light and 3.3 um PAH emission with AKARI InfraRed Camera
• Measurements of the Zodiacal Light Absolute Intensity through Fraunhofer Absorption Line Spectroscopy with CIBER
• The isotropic interplanetary dust cloud and near-infrared extragalactic background light observed with COBE/DIRBE
• SKYSURF: Constraints on Zodiacal Light and Extragalactic Background Light through Panchromatic HST All-Sky Surface-Brightness Measurements: II. First Limits on Diffuse Light at 1.25, 1.4, and 1.6 microns
• The SPHEREx Sky Simulator: Science Data Modeling for the First All-Sky Near-Infrared Spectral Survey
• AKARI near-infrared background fluctuations arise from normal galaxy populations
• Heliocentric Distance Dependence of Zodiacal Light Observed by Hayabusa2#
• The near infrared airglow continuum conundrum. Constraints for ground-based faint object spectroscopy