The assembly of ‘normal’ galaxies at z ∼ 7 probed by ALMA

By R. Maiolino, S. Carniani, A. Fontana, L. Vallini, L. Pentericci, A. Ferrara, E. Vanzella, A. Grazian, S. Gallerani, M. Castellano and 5 more. 2015

161 citations recorded by the source corpus.

We report new deep observations obtained with the Atacama Large Millimetre Array (ALMA) aimed at investigating the (C II)158µm line and continuum emission in three spectroscopically confirmedLymanbreakgalaxiesat6.8 <z ≤7.1,i.e.wellwithinthere-ionizationepoch.With star formation rates of SFR ∼ 5-15Myr −1 these systems are much more representative of thehigh-zgalaxypopulationthanothersystemstargetedinthepastbymillimetreobservations. For the galaxy with the deepest observation we detect (C II) emission at redshift z = 7.107, fully consistent with the Ly α redshift, but spatially offset by 0.7arcsec (4 kpc) from the optical emission. At the location of the optical emission, tracing both the Ly α line and the far-UV continuum, no (C II) emission is detected in any of the three galaxies, with 3σ upper limits significantly lower than the (C II) emission observed in lower redshift galaxies. These results suggest that molecular clouds in the central parts of primordial galaxies are rapidly disrupted by stellar feedback. As a result, (C II) emission mostly arises from more external accreting/satelliteclumpsofneutralgas.Thesefindingsareinagreementwithrecentmodelsof galaxy formation. Thermal far-infrared continuum is not detected in any of the three galaxies. However, the upper limits on the infrared-to-UV emission ratio do not exceed those derived in metal- and dust-poor galaxies.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/a0672caf806151f6c764881e331a14801ae0cef4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Instrumentation

Citations in the corpus

A deep ALMA image of the Hubble Ultra Deep Field (2016, background): “…on pointed observations of known objects (e.g. Hodge et al. 2013; Karim et al. 2013; Ouchi et al. 2013; Bussmann et al. 2015; Capak et al. 2015; Maiolino et al. 2015; Simpson et al. 2015a, 2015b; Scoville et al. 2016), including gravitationally lensed sources (e.g. Weiss et al. 2013; Watson et…”
Big Three Dragons: A z = 7.15 Lyman-break galaxy detected in [O iii] 88 μm, [C ii] 158 μm, and dust continuum with ALMA (2018, methodology): “Carniani et al. (2017) have reported detections of [Oiii] and [Cii] in a galaxy at z = 7.11 (BDF-3299: Vanzella et al. 2011; Maiolino et al. 2015).”
The HDUV Survey: A Revised Assessment of the Relationship between UV Slope and Dust Attenuation for High-redshift Galaxies (2017, background): “…very high-redshift galaxies, and a few recent efforts have focused in particular on the [C II]158µm line in galaxies at z & 5 (Schaerer et al. 2015; Maiolino et al. 2015; Watson et al. 2015; Capak et al. 2015; Willott et al. 2015; Knudsen et al. 2016; Pentericci et al. 2016) and dust continuum at…”
The Universe Is Reionizing at z ∼ 7: Bayesian Inference of the IGM Neutral Fraction Using Lyα Emission from Galaxies (2017, background): “…contain less dust (as ALMA and Plateau de Bure Interferometer (PdBI) re- sults are suggesting, Walter et al. 2012; Ouchi et al. 2013; Ota et al. 2014; Schaerer et al. 2015; Maiolino et al. 2015; Capak et al. 2015; Bouwens et al. 2016b; Pentericci et al. 2016) and neutral gas than at low redshifts.”
The ALPINE-ALMA [CII] survey (2020, background): “…during and right after reionization provide information on the possible properties of these galaxies despite the difficulty in taking into account early galaxyformation processes during and right after the Epoch of reionization in a consistent way (e.g., Dayal et al. 2013; Maiolino et al. 2015).”
An ALMA [C ii] Survey of 27 Quasars at z > 5.94 (2018, background): “On the other hand, Lyman break galaxies (LBGs) and Lyα emitters (LAEs) at >z 5 (Riechers et al. 2014; Capak et al. 2015; Maiolino et al. 2015; Pentericci et al. 2016) show significantly narrow [C II] lines, with a mean and standard deviation of 200±100 -km s 1.”
GOODS-ALMA: 1.1 mm galaxy survey (2018, result): “This offset has already been identified in previous studies (e.g. Maiolino et al. 2015; Rujopakarn et al. 2016; Dunlop et al. 2017).”
ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: THE INFRARED EXCESS OF UV-SELECTED z = 2–10 GALAXIES AS A FUNCTION OF UV-CONTINUUM SLOPE AND STELLAR MASS (2016, background): “…first results from these facilities indicated that there was no detectable dustenshrouded star formation in normal or even extremely bright UV -selected z > 5 galaxies (Walter et al. 2012; Ouchi et al. 2013; Ota et al. 2014; González-López et al. 2014; Riechers et al. 2014; Maiolino et al. 2015).”