NOAO >   Observing Info >   Approved Programs >   2017B-0354

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Program Information for 2017B-0354


PI: Shiro Mukae, University of Tokyo, mukae@icrr.u-tokyo.ac.jp
Address: 5-1-5 Kashiwanoha, Kashiwa City, Chiba, 277-8582 Japan

CoI: Masami Ouchi, University of Tokyo
CoI: Jason Prochaska, University of California
CoI: Sebastiano Cantalupo, ETH Zurich
CoI: Zheng Cai, University of California
CoI: Khee-Gan Lee, Lawrence Berkeley National Laboratory
CoI: Nao Suzuki, Kavli IPMU
CoI: John Silverman, Kavli IPMU
CoI: Kentaro Nagamine, Osaka University
CoI: Katsumi Fujita, Osaka University
CoI: Toru Misawa, Shinshu University
CoI: Suzuka Koyamada, Shinshu University
CoI: Akio Inoue, Osaka Sangyo University
CoI: Yuichi Matsuda, NAOJ
CoI: Yi-Kuan Chiang, Johns Hopkins U.
CoI: Takashi Kojima, University of Tokyo
CoI: Yoshiaki Ono, University of Tokyo
CoI: Takatoshi Shibuya, University of Tokyo

Title: IGM Tomography of the Enormous Lyman Alpha Nebulae

Abstract: We propose efficient LBT/LBC imagings with U and I filters in the fields of Slug Nebula at z~2.3 and Jackpot Nebula at z~2.1, whose Lyman alpha emission extends over 300 pkpc beyond the virial radius (hereafter Enormous Lyman alpha Nebulae, ELANe). Our goals are to test whether the Lyman alpha emission mechanism of the ELANe is i) the recombination radiation from HI gas that has been photoionized by the quasar (recombination) or ii) the resonant scattering of Lyman alpha produced in the quasar (scattering), and to investigate the HI extent of the ELANe in large-scale structure. We will obtain deep U and I band imaging data indispensable to making targets of bright background galaxies at z ~ 2.2 − 2.7 that yield sightline separated by 2.4h−1 Mpc in our IGM tomography experiments. To achieve the sightline separation, we will probe down to star-forming galaxies with V ~ 24.85 corresponding to galaxies with the characteristic luminosity L* at z ~ 2.5 (Lee et al. 2014). We will select background galaxies based on U-dropout technique, using LBC deep U and I band imaging data in this program and V band imaging data taken in previous studies. This program is the preparation study for conducting IGM tomography in the fields of the Slug Nebula and Jackpot Nebula. We will perform LRIS spectroscopy of the background galaxy targets in the fields of the Slug Nebula and Jackpot Nebula, and measure Lyman alpha forest absorptions in the spectra of the background galaxies for IGM tomography. The IGM tomography of ELANe will provide understanding of physical origin and connection between the ELANe and galaxy formation in cosmic web.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  LBT-SVC/LBC -- 5hrs


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017B-0354

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