ALMA Deep Field in SSA22: A near-infrared-dark submillimeter galaxy at z=4.0

Abstract

Deep surveys with Atacama Large Millimeter Array (ALMA) have uncovered a population of dusty star-forming galaxies which are faint or even undetected at optical to near-infrared wavelengths. Their faintness at short wavelengths makes detailed characterization of the population challenging. Here we present a spectroscopic redshift identification and characterization of one of such near-infrared-dark galaxy discovered by an ALMA deep survey. Detection of [CI](1-0) and CO(4-3) emission lines determines the precise redshift of the galaxy, ADF22.A2, to be z=3.9913+/-0.0008. On the basis of multi-wavelength analysis, ADF22.A2 is found to be a massive, star-forming galaxy with stellar mass Mstar = $1.1_{-0.6}^{+1.3}$ x 10^{11} Msun and SFR = $430_{-150}^{+230}$ Msun/yr. The molecular gas mass is derived to be M ($H_2$) = 5.9 +/- 1.5x10^{10} Msun, indicating a gas fraction of ~35%, and the ratios of $L_{[\mathrm{CI}](1-0)}/L_{\mathrm{IR}}$ and $L_{[\mathrm{CI}](1-0)}/L_{\mathrm{CO}(4-3)}$ suggests that the nature of the interstellar medium in ADF22.A2 is in accordance with those of other bright submillimeter galaxies. The properties of ADF22.A2, including redshift, star-formation rate, stellar mass, and depletion time scale (tau~0.1-0.2 Gyr), also suggest that ADF22.A2 has the characteristics expected for the progenitors of quiescent galaxies at z>3. Our results demonstrate the power of ALMA contiguous mapping and line scan to obtain an unbiased view of galaxy formation in the early Universe.

Accepted for publication in A&A Letters, 7 pages, 7 figures, 1 table

References in corpus (15)

• A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
• An ALMA survey of Sub-millimeter Galaxies in the Extended Chandra Deep Field South: Physical properties derived from ultraviolet-to-radio modelling
• The SCUBA-2 Cosmology Legacy Survey: 850um maps, catalogues and number counts
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Survey Description
• Luminous Infrared Galaxies with the Submillimeter Array: I. Survey Overview and the Central Gas to Dust Ratio
• Gas filaments of the cosmic web located around active galaxies in a proto-cluster
• ALMA observations of atomic carbon in z~4 dusty star-forming galaxies
• ALMA Deep Field in SSA22: Source Catalog and Number Counts
• Physical Characterization of an Unlensed Dusty Star-Forming Galaxy at $z=5.85$
• COLDz: A High Space Density of Massive Dusty Starburst Galaxies ~1 Billion Years after the Big Bang
• ALMA twenty-six arcmin${}^2$ survey of GOODS-S at one-millimeter (ASAGAO): Near-infrared-dark faint ALMA sources
• Ultradeep Near-Infrared Observations of GOODS 850-5
• Planck's Dusty GEMS. VII. Atomic carbon and molecular gas in dusty starburst galaxies at z=2 to 4
• The redshift and star formation mode of AzTEC2: a pair of massive galaxies at $z=4.63$
• SXDF-ALMA 2 Arcmin^2 Deep Survey: Resolving and Characterizing the Infrared Extragalactic Background Light Down to 0.5 mJy

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