Dust in the Reionization Era: ALMA Observations of a z = 8.38 Gravitationally Lensed Galaxy
By N. Laporte, Richard S. Ellis, F. Boone, F. E. Bauer, David Qu'enard, G. Roberts-Borsani, R. Pell'o, I. P'erez-Fournon, A. Streblyanska. 2017
235 citations recorded by the source corpus.
We report on the detailed analysis of a gravitationally lensed Y-band dropout, A2744_YD4, selected from deep Hubble Space Telescope imaging in the Frontier Field cluster Abell 2744. Band 7 observations with the Atacama Large Millimeter/submillimeter Array (ALMA) indicate the proximate detection of a significant 1 mm continuum flux suggesting the presence of dust for a star-forming galaxy with a photometric redshift of . Deep X-SHOOTER spectra confirms the high-redshift identity of A2744_YD4 via the detection of Lyα emission at a redshift z = 8.38. The association with the ALMA detection is confirmed by the presence of [O iii] 88 μm emission at the same redshift. Although both emission features are only significant at the 4σ level, we argue their joint detection and the positional coincidence with a high-redshift dropout in the Hubble Space Telescope images confirms the physical association. Analysis of the available photometric data and the modest gravitational magnification ( ) indicates A2744_YD4 has a stellar mass of ∼2 × 109 , a star formation rate of ∼20 yr−1 and a dust mass of ∼6 × 106 . We discuss the implications of the formation of such a dust mass only after the onset of cosmic reionization.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/63d3827d0d0108fa4bb8c17bbf3a2387949209b3
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
- 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, background): “In star forming galaxies at z > 6− 7, all but one previous studies have assumed a dust temperature, Td, and a dust emissivity index, βd, because of none or a single dust continuum detection (e.g., Ota et al. 2014; Matthee et al. 2017; Laporte et al. 2017).”
- Detection of the Far-infrared [O iii] and Dust Emission in a Galaxy at Redshift 8.312: Early Metal Enrichment in the Heart of the Reionization Era (2018, background): “…have been invested in Lyα searches for z>8 candidates, but so far this resulted in only a few detections (z=8.683, 8.38, 9.11, Zitrin et al. 2015b; Laporte et al. 2017; Hashimoto et al. 2018c, respectively), likely indicating that the Lyα signal is substantially attenuated by the largely…”
- The GLASS-JWST Early Release Science Program. I. Survey Design and Release Plans (2022, methodology): “…the gain in information and variety of emission lines detected from each configuration, we highlight four real sources at redshifts of zspec= 8.38 (Laporte et al. 2017b), zspec= 5.054 (Mahler et al. 2018; Richard et al. 2021), zspec= 2.327 (Mahler et al. 2018; Richard et al. 2021), and zspec=…”
- Inferences on the timeline of reionization at z ∼ 8 from the KMOS Lens-Amplified Spectroscopic Survey (2019, methodology): “…resolution) for current detections of Lyα in z > 7 LBGs (Oesch et al. 2015; Roberts-Borsani et al. 2016; Stark et al. 2017; Zitrin et al. 2015; Song et al. 2016a; Finkelstein et al. 2013; Shibuya et al. 2012; Ono et al. 2012; Schenker et al. 2012; Vanzella et al. 2011; Laporte et al. 2017a).”