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http://dx.doi.org/10.5303/PKAS.2017.32.1.321

THE DIFFUSE NEAR-INFRARED BACKGROUND SPECTRUM FROM AKARI  

Kohji, Tsumura (Frontier Research Institute for Interdisciplinary Science, Tohoku University)
Toshio, Matsumoto (Institute of Astronomy and Astrophysics, Academia Sinica)
Shuji, Matsuura (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Itsuki, Sakon (Department of Astronomy, Graduate School of Science, The University of Tokyo)
Takehiko, Wada (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
Publication Information
Publications of The Korean Astronomical Society / v.32, no.1, 2017 , pp. 321-326 More about this Journal
Abstract
We analyzed spectral data of the astrophysical diffuse emission obtained with the low-resolution spectroscopy mode on the AKARI InfraRed Camera (IRC) in the $1.8-5.3{\mu}m$ wavelength region. Advanced reduction methods specialized for slit spectroscopy of diffuse sky spectra have been developed, and a catalog of 278 spectra of the diffuse sky covering a wide range of Galactic and ecliptic latitudes was constructed. Using this catalog, two other major foreground components, the zodiacal light (ZL) and the diffuse Galactic light (DGL), were separated and subtracted by taking correlations with ZL brightness estimated by the DIRBE ZL model and with the $100{\mu}m$ dust thermal emission, respectively. The isotropic emission was interpreted as the extragalactic background light (EBL), which shows significant excess over the integrated light of galaxies at <$4{\mu}m$.
Keywords
AKARI; diffuse galactic light; extragalactic background light; spectral catalog; zodiacal light;
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