MEASUREMENTS OF THE MEAN DIFFUSE GALACTIC LIGHT SPECTRUM IN THE 0.95–1.65 μm BAND FROM CIBER

Journal Article · Wed Jun 10 04:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/806/1/69· OSTI ID:22522314

Arai, T.; Matsuura, S.; Sano, K.; Matsumoto, T.; Nakagawa, T.; Onishi, Y. ^[1]; Bock, J.; Lanz, A.; Korngut, P.; Zemcov, M. ^[2]; Cooray, A.; Smidt, J. ^[3]; Kim, M. G.; Lee, H. M. ^[4]; Lee, D. H. ^[5]; Shirahata, M. ^[6]; Tsumura, K. ^[7]

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1. Department of Space Astronomy and Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210 (Japan)
2. Department of Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States)
3. Center for Cosmology, University of California, Irvine, Irvine, CA 92697 (United States)
4. Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of)
5. Korea Astronomy and Space Science Institute (KASI), Daejeon 305-348 (Korea, Republic of)
6. National Institutes of Natural Science, National Astronomical Observatory of Japan (NAOJ), Tokyo 181-8588 (Japan)
7. Frontier Research Institute for Interdisciplinary Science, Tohoku University, Sendai 980-8578 (Japan)

We report measurements of the diffuse galactic light (DGL) spectrum in the near-infrared, spanning the wavelength range 0.95–1.65 μm by the Cosmic Infrared Background ExpeRiment. Using the low-resolution spectrometer calibrated for absolute spectro-photometry, we acquired long-slit spectral images of the total diffuse sky brightness toward six high-latitude fields spread over four sounding rocket flights. To separate the DGL spectrum from the total sky brightness, we correlated the spectral images with a 100 μm intensity map, which traces the dust column density in optically thin regions. The measured DGL spectrum shows no resolved features and is consistent with other DGL measurements in the optical and at near-infrared wavelengths longer than 1.8 μm. Our result implies that the continuum is consistently reproduced by models of scattered starlight in the Rayleigh scattering regime with a few large grains.

• OSTI ID: 22522314
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 806; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BRIGHTNESS
DENSITY
IMAGES
INFRARED SPECTRA
INTERSTELLAR GRAINS
MILKY WAY
NEAR INFRARED RADIATION
PHOTOMETRY
RAYLEIGH SCATTERING
RESOLUTION
SKY
SOUND WAVES
SPECTROPHOTOMETRY
VISIBLE RADIATION
WAVELENGTHS