Witnessing the birth of the red sequence: ALMA high-resolution imaging of [CII] and dust in two interacting ultra-red starbursts at z = 4.425

Abstract

Exploiting the sensitivity and spatial resolution of the Atacama Large Millimeter/submillimeter Array (ALMA), we have studied the morphology and the physical scale of the interstellar medium - both gas and dust - in SGP38326, an unlensed pair of interacting starbursts at $z=4.425$. SGP38326 is the most luminous star bursting system known at $z>4$ with an IR-derived $\mathrm{SFR}\sim 4300M_{\odot }{\mathrm{yr}}^{-1}$. SGP38326 also contains a molecular gas reservoir among the most massive ever found in the early Universe, and it is the likely progenitor of a massive, red-and-dead elliptical galaxy at $z\sim 3$. Probing scales of $\sim 0.1"$ or $\sim 800\mathrm{pc}$ we find that the smooth distribution of the continuum emission from cool dust grains contrasts with the more irregular morphology of the gas, as traced by the [CII] fine structure emission. The gas is also extended over larger physical scales than the dust. The velocity information provided by the resolved [CII] emission reveals that the dynamics of the two components of SGP38326 are compatible with disk-like, ordered rotation, but also reveals an ISM which is turbulent and unstable. Our observations support a scenario where at least a subset of the most distant extreme starbursts are highly dissipative mergers of gas-rich galaxies.

Submitted to ApJ

References in corpus (25)

• A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34
• ISM masses and the star formation law at Z = 1 to 6 // ALMA observations of dust continuum in 145 galaxies in the COSMOS survey field
• The Large APEX Bolometer Camera LABOCA
• An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South: High resolution 870um source counts
• A Kiloparsec-Scale Hyper-Starburst in a Quasar Host Less than 1 Gigayear after the Big Bang
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the rest-frame far-infrared emission of sub-millimeter galaxies
• ALMA Imaging of Gas and Dust in a Galaxy Protocluster at Redshift 5.3: [CII] Emission in "Typical" Galaxies and Dusty Starbursts ~1 Billion Years after the Big Bang
• Very extended cold gas, star formation and outflows in the halo of a bright QSO at z>6
• Evolution of the Color-Magnitude Relation in Galaxy Clusters at z ~1 from the ACS Intermediate Redshift Cluster Survey
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the bright-end of the sub-millimeter number counts
• The First Appearance of the Red Sequence of Galaxies in Proto-Clusters at 2<~z<~3
• The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45
• The nature of the [CII] emission in dusty star-forming galaxies from the SPT survey
• The kiloparsec-scale star formation law at redshift 4: wide-spread, highly efficient star formation in the dust-obscured starburst galaxy GN20
• The Detection of a Red Sequence of Massive Field Galaxies at z~2.3 and its Evolution to z~0
• Measures of galaxy dust and gas mass with Herschel photometry and prospects for ALMA
• The far-infrared emitting region in local galaxies and QSOs: Size and scaling relations
• Extended [CII] Emission in Local Luminous Infrared Galaxies
• The Strikingly Uniform, Highly Turbulent Interstellar Medium of the Most Luminous Galaxy in the Universe
• HerMES: The Rest-Frame UV Emission and A Lensing Model for the z=6.34 Luminous Dusty Starburst Galaxy HFLS3
• The Nascent Red Sequence at z~2
• Herschel-ATLAS: Properties of dusty massive galaxies at low and high redshifts
• Spectroscopic Confirmation of an Ultra Massive and Compact Galaxy at z=3.35: A Detailed Look at an Early Progenitor of Local Most Massive Ellipticals
• Chandra deep observation of XDCP J0044.0-2033, a massive galaxy cluster at z>1.5
• Gas and Dust in the Taffy Galaxies: Ugc12914/15

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