Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Kwansei Gakuin University
Japan Aerospace Exploration Agency (JAXA)
Kwansei Gakuin University
California Institute of Technology, National Aeronautics and Space Administration (NASA)
University of California
California Institute of Technology
California Institute of Technology
The Observatories of the Carnegie Institution for Science
Korea Astronomy and Space Science Institute (KASI)
Japan Aerospace Exploration Agency (JAXA)
California Institute of Technology
Japan Aerospace Exploration Agency (JAXA)
Kyushu Institute of Technology
Japan Aerospace Exploration Agency (JAXA)
National Institutes of Natural Sciences
Faculty of Science and Engineering
Rochester Institute of Technology
抄録
We report the first measurement of the zodiacal light (ZL) polarization spectrum in the near-infrared between 0.8 and 1.8 μm. Using the low-resolution spectrometer on board the Cosmic Infrared Background Experiment, calibrated for absolute spectrophotometry and spectropolarimetry, we acquire long-slit polarization spectral images of the total diffuse sky brightness toward five fields. To extract the ZL spectrum, we subtract the contribution of other diffuse radiation, such as the diffuse galactic light, the integrated starlight, and the extragalactic background light. The measured ZL polarization spectrum shows little wavelength dependence in the near-infrared, and the degree of polarization clearly varies as a function of the ecliptic coordinates and solar elongation. Among the observed fields, the North Ecliptic Pole shows the maximum degree of polarization of ∼20%, which is consistent with an earlier observation from the Diffuse Infrared Background Experiment on board on the Cosmic Background Explorer. The measured degree of polarization and its solar elongation dependence are reproduced by an empirical scattering model in the visible band and also by a Mie scattering model for large absorptive particles, while a Rayleigh scattering model is ruled out. All of our results suggest that the interplanetary dust is dominated by large particles.
雑誌名
Astrophysical Journal
巻
926
号
1
ページ
6-1 - 6-16
発行年
2022-02-08
出版者
IOP Publishing
ISSN
0004-637X
1538-4357
DOI
https://doi.org/10.3847/1538-4357/ac416f
権利
Copyright (c) 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (http://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Polarization Spectrum of Near-Infrared Zodiacal Light Observed with CIBER
LaSEINE-2021_038.pdf
(1.64MB)
