NOAO >   Observing Info >   Approved Programs >   2009A-0125

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Proposal Information for 2009A-0125


PI: Kimiaki KAWARA, University of Tokyo(UT), kkawara@ioa.s.u-tokyo.ac.jp
Address: Institute of Astronomy(IoA), Osawa 2-21-1, Mitaka, Tokyo 181-0015, JAPAN

CoI: Nobuyuki Ienaka, UT, IoA
CoI: Hiroaki Sameshima, UT, IoA
CoI: Naoko Asami, UT, IoA
CoI: Yoshiki Mastuoka, UT, IoA
CoI: Shinki Oyabu, JAXA, ISAS

Title: Cosmic Optical Background

Abstract: The Cosmic Optical Background (COB) constitutes vital information on formation of galaxies, AGNs, and large-scale structure, since it records the total emission from stars in galaxies and any light-emitting materials in intergalactic space, if any, over all time after z ~ 6. Here, we propose to do B- and R-band imaging over an area of 50 square degrees covering the CO cloud and the minimum HI column density points in the Lockman Hole. These optical data will be combined with the diffuse far-infrared maps of the Akari satellite. Utilizing the shielding effect of dark clouds on optical light and the correlation between the optical scattered light and the far-infrared emission, we will observe the COB. The proposed observation is useful for other studies: (1) distribution of interstellar dust; (2) optical properties of dust grain in the optical and far-infrared such as extinction coefficients and size distribution of dust; (3) reducing the confusion noise by IR cirrus when searching for faint far-infrared galaxies.


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NOAO >   Observing Info >   Approved Programs >   2009A-0125

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