| Title: |
Extended Lyman-$\alpha$ emission towards the SPT2349-56 protocluster at $z=4.3$ |
| Authors: |
Apostolovski, Yordanka; Aravena, Manuel; Anguita, Timo; Béthermin, Matthieu; Burgoyne, James; Chapman, Scott; de Breuck, Carlos; Gonzalez, Anthony; Gronke, Max; Guaita, Lucia; Hezaveh, Yashar; Hill, Ryley; Jarugula, Sreevani; Johnston, Evelyn; Malkan, Matt; Narayanan, Desika; Reuter, Cassie; Solimano, Manuel; Spilker, Justin; Sulzenauer, Nikolaus; Vieira, Joaquin; Vizgan, David; Weiß, Axel |
| Contributors: |
Laboratoire d'Astrophysique de Marseille (LAM); Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) |
| Source: |
ISSN: 0004-6361. |
| Publisher Information: |
CCSD; EDP Sciences |
| Publication Year: |
2024 |
| Collection: |
Aix-Marseille Université: HAL |
| Subject Terms: |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
| Description: |
International audience ; Context. Deep spectroscopic surveys with the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed that some of the brightest infrared sources in the sky correspond to concentrations of dusty star-forming galaxies (DSFG) at high redshift. Among these, the SPT2349-56 protocluster system at z = 4.304 is amongst the most extreme examples due to its high source density and integrated star formation rate. Aims. We conducted a deep Lyman-$\alpha$ line emission survey around SPT2349-56 using the Multi-Unit Spectroscopic Explorer (MUSE) at Very Large Telescope (VLT) in order to characterize this uniquely dense environment. Methods. Taking advantage of the deep three-dimensional nature of this survey, we performed a sensitive search for Lyman-$\alpha$ emitters (LAEs) toward the core and northern extension of the protocluster, which correspond to the brightest infrared regions in this field. Using a smoothed narrowband image extracted from the MUSE datacube around the protocluster redshift, we searched for possible extended structures. Results. We identify only three LAEs at z = 4.3 in this field, in concordance with expectations for blank-fields, and an extended Lyman-$\alpha$ structure spatially associated with core of the protocluster. All the previously-identified DSFGs in this field are undetected in Lyman-$\alpha$ emission, consistent with the conspicuous dust obscuration in these systems. We find an extended Lyman-$\alpha$ structure, about $60 \times 60$ kpc$^{2}$ in size, and located 56 kpc west of the protocluster core. Three DSFGs coincide spatially with the location of this structure. We conclude that either the three co-spatial DSFGs or the protocluster core itself are feeding ionizing photons to the Lyman-$\alpha$ structure. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2301.01328; ARXIV: 2301.01328; INSPIRE: 2620474 |
| DOI: |
10.1051/0004-6361/202245785 |
| Availability: |
https://hal.science/hal-03949503; https://hal.science/hal-03949503v1/document; https://hal.science/hal-03949503v1/file/aa45785-22.pdf; https://doi.org/10.1051/0004-6361/202245785 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.798A1E21 |
| Database: |
BASE |