Subaru/MOIRCS Near-Infrared Imaging in the Proto-Cluster Region at z=3.1

Abstract

We present the results of deep near-infrared imaging observations of the z=3.1 proto-cluster region in the SSA22a field taken by MOIRCS mounted on the Subaru Telescope. We observed a 21.7 arcmin^2 field to the depths of J=24.5, H=24.3, and K=23.9 (5 sigma). We examine the distribution of the K-selected galaxies at z~3 by using the simple color cut for distant red galaxies (DRGs) as well as the photometric-redshift selection technique. The marginal density excess of DRGs and the photo-z selected objects are found around the two most luminous Ly alpha blobs (LABs). We investigate the correlation between the K-selected objects and the LABs, and find that several galaxies with stellar mass M_* = 10^9-10^11 M_solar exist in vicinity of LABs, especially around the two most luminous ones. We also find that 7 of the 8 LABs in the field have plausible K_s-band counterparts and the sum of the stellar mass possibly associated with LABs correlates with the luminosity and surface brightness of them, which implies that the origin of Ly alpha emission may be closely correlated with their stellar mass or their previous star formation phenomena.

15 pages, 9 figures, accepted for publication in PASJ Vol.60, No.4

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Cited by in corpus (23)

• Discovery of a Giant Lya Emitter Near the Reionization Epoch
• The Chandra Deep Protocluster Survey: Ly-alpha Blobs are powered by heating, not cooling
• Panoramic Survey of Lyman α Emitters at z=3.1
• The Chandra Deep Protocluster Survey: Point-Source Catalogs for a 400 ks Observation of the z = 3.09 Protocluster in SSA22
• Discovery of an Excess of Halpha Emitters around 4C 23.56 at z=2.48
• AzTEC/ASTE 1.1 mm survey of SSA22: Counterpart identification and photometric redshift survey of submillimeter galaxies
• The Formation of the massive galaxies in the SSA22 z=3.1 protocluster
• Estimates of the Planet Yield from Ground-Based High-Contrast Imaging Observations as a Function of Stellar Mass
• NIR spectroscopic observation of massive galaxies in the protocluster at z = 3.09
• Nature of Lyman Alpha Blobs: Powered by Extreme Starbursts
• Submillimeter Array Identification of the Millimeter-Selected Galaxy SSA22-AzTEC1: A Protoquasar in a Protocluster?
• ALMA observations of Lyman-alpha Blob 1: halo sub-structure illuminated from within
• Assembly of Massive Galaxies in a High-z Protocluster
• An extremely dense group of massive galaxies at the centre of the protocluster at z = 3.09 in the SSA22 field
• Lyman-alpha Emitters in Cosmological Simulations I: Lyman-alpha Escape Fraction and Statistical Properties at z=3.1
• Constraining Dust and Molecular Gas Properties in Lyman Alpha Blobs at z~3
• Revisiting the Gas Kinematics in SSA22 Lyman-$\alpha$ Blob 1 with Radiative Transfer Modeling in a Multiphase, Clumpy Medium
• Obscured star formation in Ly-alpha blobs at z = 3.1
• The environments of Ly$\alpha$ blobs I: Wide-field Ly$\alpha$ imaging of TN J1338-1942, a powerful radio galaxy at $z\simeq 4.1$ associated with a giant Ly$\alpha$ nebula
• Bimodal morphologies of massive galaxies at the core of a protocluster at z=3.09 and the strong size growth of a brightest cluster galaxy
• Two types of Lyman-alpha emitters envisaged from hierarchical galaxy formation
• The average submillimetre properties of Lyman-alpha Blobs at z=3
• A Gravitational Lens Model for the Lya Emitter, LAE 221724+001716 at z=3.1 in the SSA 22 Field