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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32104
Title: Constraints on the [C II] luminosity of a proto-globular cluster at z ∼ 6 obtained with ALMA
Authors: CALURA, Francesco 
VANZELLA, Eros 
Carniani, Stefano 
GILLI, Roberto 
Rosati, Piero 
MENEGHETTI, MASSIMO 
Paladino, Rosita 
DECARLI, ROBERTO 
Brusa, Marcella 
LUPI, ALESSANDRO 
D'AMATO, QUIRINO 
BERGAMINI, PIETRO 
Caminha, Gabriel B.
Issue Date: 2021
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 500
Issue: 3
First Page: 3083
Abstract: We report on ALMA observations of D1, a system at z ∼ 6.15 with stellar mass M∼ 107M⊙ containing globular cluster (GC) precursors, stronglymagnified by the galaxy clusterMACS J0416.1-2403. Since the discovery of GC progenitors at high redshift, ours is the first attempt to probe directly the physical properties of their neutral gas through infrared observations. A careful analysis of our data set, performed with a suitable procedure designed to identify faint narrow lines and which can test various possible values for the unknown linewidth value, allowed us to identify a 4σ tentative detection of [CII] emission with intrinsic luminosity L[C II] = (2.9 ± 1.4) 106 L⊙, one of the lowest values ever detected at high redshift. This study offers a first insight on previously uncharted regions of the L[C II]-SFR relation. Despite large uncertainties affecting our measure of the star formation rate, if taken at face value our estimate lies more than ∼1 dex below the values observed in local and high redshift systems. Our weak detection indicates a deficiency of [C II] emission, possibly ascribed to various explanations, such as a low-density gas and/or a strong radiation field caused by intense stellar feedback, and a low metal content. From the non-detection in the continuum, we derive constraints on the dust mass, with 3σ upper limit values as low as ∼ a few 104 M⊙, consistent with the values measured in local metal-poor galaxies.
URI: http://hdl.handle.net/20.500.12386/32104
URL: https://api.elsevier.com/content/abstract/scopus_id/85098561415
https://academic.oup.com/mnras/article/500/3/3083/5925357?login=false
ISSN: 0035-8711
DOI: 10.1093/mnras/staa3185
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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