ALMA Lensing Cluster Survey: Bright [CII] 158 $\mu$m Lines from a Multiply Imaged Sub-$L^{\star }$ Galaxy at $z=6.0719$

Abstract

We present bright [CII] 158 $\mu$m line detections from a strongly magnified and multiply-imaged ($\mu \sim 20-160$) sub-$L^{\ast }$ ($M_{\mathrm{UV}}$ = $-19.75_{-0.44}^{+0.55}$) Lyman-break galaxy (LBG) at $z=6.0719\pm 0.0004$ from the ALMA Lensing Cluster Survey (ALCS). Emission lines are identified at 268.7 GHz at $\ge$ 8$\sigma$ exactly at positions of two multiple images of the LBG behind the massive galaxy cluster RXCJ0600$-$2007. Our lens models, updated with the latest spectroscopy from VLT/MUSE, indicate that a sub region of the LBG crosses the caustic and is lensed into a long ($\sim 6^{\prime \prime }$) arc with a local magnification of $\mu \sim 160$, for which the [CII] line is also significantly detected. The source-plane reconstruction resolves the interstellar medium (ISM) structure, showing that the [CII] line is co-spatial with the rest-frame UV continuum at the scale of $\sim$300 pc. The [CII] line properties suggest that the LBG is a rotation-dominated system whose velocity gradient explains a slight difference of redshifts between the whole LBG and its sub region. The star formation rate (SFR)-$L_{[\mathrm{CII}]}$ relations from the sub to the whole regions of the LBG are consistent with those of local galaxies. We evaluate the lower limit of the faint-end of the [CII] luminosity function at $z=6$, and find that it is consistent with predictions from semi analytical models and from the local SFR-$L_{[\mathrm{CII}]}$ relation with a SFR function at $z=6$. These results imply that the local SFR-$L_{[\mathrm{CII}]}$ relation is universal for a wide range of scales including the spatially resolved ISM, the whole region of galaxy, and the cosmic scale, even in the epoch of reionization.

27 pages, 10 figures, 6 tables, ApJ in press

References in corpus (30)

• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• EAZY: A Fast, Public Photometric Redshift Code
• A Bayesian approach to strong lensing modelling of galaxy clusters
• Intense Star Formation within Resolved Compact Regions in a Galaxy at z=2.3
• Kiloparsec-scale dust disks in high-redshift luminous submillimeter galaxies
• A galaxy at a redshift z = 6.96
• Hubble Space Telescope Combined Strong and Weak Lensing Analysis of the CLASH Sample: Mass and Magnification Models and Systematic Uncertainties
• New observations of z~7 galaxies: evidence for a patchy reionization
• A Compendium of Far-Infrared Line and Continuum Emission for 227 Galaxies Observed by the Infrared Space Observatory
• A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z=7.730 using Keck/MOSFIRE
• [CII] 158 $\mu$m Emission as a Star Formation Tracer
• Rapid Decline of Lyman-alpha Emission Toward the Reionization Era
• A dynamically cold disk galaxy in the early Universe
• The ALPINE-ALMA [CII] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universe
• Tracing the reionization epoch with ALMA: [CII] emission in z~7 galaxies
• Kinematics of $z\ge 6$ galaxies from [CII] line emission
• The ALMA Spectroscopic Survey in the HUDF: Multi-band constraints on line luminosity functions and the cosmic density of molecular gas
• ALMA reveals metals yet no dust within multiple components in CR7
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Search for [CII] line and dust emission in 6<z<8 galaxies
• ALMA Characterises the Dust Temperature of z ~ 5.5 Star-Forming Galaxies
• A VLT/FORS2 view at $z\sim 6$: Lyman-$\alpha$ emitter fraction and galaxy physical properties at the edge of the epoch of cosmic reionization
• A Far-Infrared Spectroscopic Survey of Intermediate Redshift (Ultra) Luminous Infrared Galaxies
• Mass distribution in the core of MACS J1206: robust modeling from an exceptionally large sample of central multiple images
• ALMA Reveals Weak [NII] Emission in "Typical" Galaxies and Intense Starbursts at z=5-6
• No evidence for [CII] halos or high-velocity outflows in z>6 quasar host galaxies
• The Absence of [CII] 158$\mu$m Emission in Spectroscopically-Confirmed Galaxies at $z>8$
• Dynamical Characterization of Galaxies at z~4-6 via Tilted Ring Fitting to ALMA [CII] Observations
• ALMA Lensing Cluster Survey: a strongly lensed multiply imaged dusty system at $z\ge$6
• Constraints on the [CII] luminosity of a proto-globular cluster at z~6 obtained with ALMA
• Blind millimeter line emitter search using ALMA data toward gravitational lensing clusters

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