29 July 2016 The cosmic infrared background experiment-2 (CIBER-2) for studying the near-infrared extragalactic background light
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Abstract
We present the current status of the Cosmic Infrared Background ExpeRiment-2 (CIBER-2) project, whose goal is to make a rocket-borne measurement of the near-infrared Extragalactic Background Light (EBL), under a collaboration with U.S.A., Japan, South Korea, and Taiwan. The EBL is the integrated light of all extragalactic sources of emission back to the early Universe. At near-infrared wavelengths, measurement of the EBL is a promising way to detect the diffuse light from the first collapsed structures at redshift z∼10, which are impossible to detect as individual sources. However, recently, the intra-halo light (IHL) model is advocated as the main contribution to the EBL, and our new result of the EBL fluctuation from CIBER-1 experiment is also supporting this model. In this model, EBL is contributed by accumulated light from stars in the dark halo regions of low- redshift (z<2) galaxies, those were tidally stripped by the interaction of satellite dwarf galaxies. Thus, in order to understand the origin of the EBL, both the spatial fluctuation observations with multiple wavelength bands and the absolute spectroscopic observations for the EBL are highly required. After the successful initial CIBER- 1 experiment, we are now developing a new instrument CIBER-2, which is comprised of a 28.5-cm aluminum telescope and three broad-band, wide-field imaging cameras. The three wide-field (2.3×2.3 degrees) imaging cameras use the 2K×2K HgCdTe HAWAII-2RG arrays, and cover the optical and near-infrared wavelength range of 0.5–0.9 μm, 1.0–1.4 μm and 1.5–2.0 μm, respectively. Combining a large area telescope with the high sensitivity detectors, CIBER-2 will be able to measure the spatial fluctuations in the EBL at much fainter levels than those detected in previous CIBER-1 experiment. Additionally, we will use a linear variable filter installed just above the detectors so that a measurement of the absolute spectrum of the EBL is also possible. In this paper, the scientific motivation and the expected performance for CIBER-2 will be presented. The detailed designs of the telescope and imaging cameras will also be discussed, including the designs of the mechanical, cryogenic, and electrical systems.
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Mai Shirahata, Mai Shirahata, Toshiaki Arai, Toshiaki Arai, John Battle, John Battle, James Bock, James Bock, Asantha Cooray, Asantha Cooray, Akito Enokuchi, Akito Enokuchi, Viktor Hristov, Viktor Hristov, Yoshikazu Kanai, Yoshikazu Kanai, Min Gyu Kim, Min Gyu Kim, Phillip Korngut, Phillip Korngut, Alicia Lanz, Alicia Lanz, Dae-Hee Lee, Dae-Hee Lee, Peter Mason, Peter Mason, Toshio Matsumoto, Toshio Matsumoto, Shuji Matsuura, Shuji Matsuura, Tracy Morford, Tracy Morford, Yosuke Ohnishi, Yosuke Ohnishi, Won-Kee Park, Won-Kee Park, Kei Sano, Kei Sano, Norihide Takeyama, Norihide Takeyama, Kohji Tsumura, Kohji Tsumura, Takehiko Wada, Takehiko Wada, Shiang-Yu Wang, Shiang-Yu Wang, Michael Zemcov, Michael Zemcov, } "The cosmic infrared background experiment-2 (CIBER-2) for studying the near-infrared extragalactic background light", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99044J (29 July 2016); doi: 10.1117/12.2229567; https://doi.org/10.1117/12.2229567
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