Oral Presentation
Discovering large scale structure with line search for SMGs
Presenter: Ikki Mitsuhashi (NAOJ)
We conduct line search for 184 data cubes observed with ALMA band7, which are targetting luminous(S_870> 6.6mJy) submillimeter galaxies (SMGs), selected from the SCUBA-2 COSMOS survey at COSMOS field covered by HST/ACS (~1.6 deg^2). In 184 data cubes from AS2COSMOS survey, 261 SMGs including 64 multiple field were detected, we found 5 quite luminous line emitters (S/N>9) at almost same frequency. Most of them don't have optical conterpart but have Herschel-SPIRE counterpart, also continuum flux of them are detected >10 sigma. From another observation, multi-wavelength properties and line properties, we conclude all of them are [CII] line emitter at z~4.62 and inhabit same large scale structure across ~7' correspond to 10 comoving Mpc at z~4.62, like proto-cluster.
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