CaltechAUTHORS
Published May 2021 | Version Published + Accepted Version
Journal Article Open

Three Lyman-α-emitting filaments converging to a massive galaxy group at z = 2.91: discussing the case for cold gas infall

Creators

  • 1. ROR icon University of Paris-Saclay
  • 2. ROR icon University of Copenhagen
  • 3. ROR icon University of California, Los Angeles
  • 4. ROR icon California Institute of Technology
  • 5. ROR icon Johns Hopkins University
  • 6. ROR icon University of Helsinki
  • 7. ROR icon Canadian Institute for Theoretical Astrophysics
  • 8. ROR icon Brera Astronomical Observatory
  • 9. ROR icon Instituto de Astrofísica de Canarias
  • 10. ROR icon University of La Laguna
  • 11. ROR icon Max Planck Institute for Astronomy
  • 12. ROR icon Ludwig-Maximilians-Universität München
  • 13. ROR icon University of Trieste
  • 14. ROR icon Astronomical Observatory of Rome
  • 15. ROR icon Max Planck Institute for Extraterrestrial Physics
  • 16. ROR icon Pontificial Catholic University of Valparaiso
  • 17. ROR icon University of Oslo
  • 18. ROR icon Durham University
  • 19. ROR icon University of Tokyo

Abstract

We have discovered a 300 kpc-wide giant Lyman-α (Lyα) nebula centered on the massive galaxy group RO-1001 at z = 2.91 in the Cosmic Evolution Survey field. Keck Cosmic Web Imager observations reveal three cold gas filaments converging into the center of the potential well of its ∼4 × 10¹³ M_⊙ dark matter halo, hosting 1200 M_⊙ yr⁻¹ of star formation as probed by Atacama Large Millimeter Array and NOrthern Extended Millimeter Array observations. The nebula morphological and kinematics properties and the prevalence of blueshifted components in the Lyα spectra are consistent with a scenario of gas accretion. The upper limits on active galactic nuclei activity and overall energetics favor gravity as the primary Lyα powering source and infall as the main source of gas flows to the system. Although interpretational difficulties remain, with outflows and likely also photoionization with ensuing recombination still playing a role, this finding provides arguably an ideal environment to quantitatively test models of cold gas accretion and galaxy feeding inside an actively star-forming massive halo at high redshift.

Additional Information

© E. Daddi et al. 2021. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Received 19 June 2020; Accepted 22 February 2021; Published online 13 May 2021. We are indebted to Sebastiano Cantalupo for use of his CubeEx software and for enlightening discussions. We also thank Matt Lehnert, Avishai Dekel, Nir Mandelker, Anne Verhamme, and Mauro Giavalisco for discussions. This work includes observations carried out with the IRAM NOEMA Interferometer. F.V. acknowledges support from the Carlsberg Foundation Research Grant CF18-0388 "Galaxies: Rise And Death" and the Cosmic Dawn Center of Excellence funded by the Danish National Research Foundation under then Grant No. 140. RMR acknowledges financial support from HST-GO-15910. MG was supported by NASA through the NASA Hubble Fellowship grant HST-HF2-51409 and acknowledges support from HST grants HST-GO-15643.017-A, HST-AR-15039.003-A, and XSEDE grant TG-AST180036. AP acknowledges financial support from STFC through grants ST/T000244/1 and ST/P000541/1. S.J. acknowledges financial support from the Spanish Ministry of Science, Innovation and Universities (MICIU) under AYA2017-84061-P, co-financed by FEDER (European Regional Development Funds). VS acknowledges support from the ERC-StG ClustersXCosmo grant agreement 716762. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). This paper makes use of data from ALMA: a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This work was supported by the Programme National Cosmology et Galaxies (PNCG) of CNRS/INSU with INP and IN2P3, co-funded by CEA and CNES.

Attached Files

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Accepted Version - 2006.11089.pdf

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Additional details

Additional titles

Alternative title
Three Lyman-alpha emitting filaments converging to a massive galaxy group at z = 2.91: discussing the case for cold gas infall
Alternative title
Three Lyman-alpha emitting filaments converging to a massive galaxy group at z = 2.91: a case for cold gas infall

Identifiers

Eprint ID
109159
Resolver ID
CaltechAUTHORS:20210518-071644588

Related works

Describes
https://arxiv.org/abs/2006.11089 (URL)

Funding

Carlsberg Foundation
CF18-0388
Danish National Research Foundation
140
NASA Hubble Fellowship
HST-GO-15910
NASA Hubble Fellowship
HST-HF2-51409
NASA Hubble Fellowship
HST-GO-15643.017-A
NASA Hubble Fellowship
HST-AR-15039.003-A
NSF
TG-AST180036
Science and Technology Facilities Council (STFC)
ST/T000244/1
Science and Technology Facilities Council (STFC)
ST/P000541/1
Ministerio de Ciencia, Innovación y Universidades (MICIU)
AYA2017-84061-P
Fondo Europeo de Desarrollo Regional (FEDER)
European Regional Development Funds (ERDF)
European Research Council (ERC)
716762
Institut national des sciences de l'Univers (INSU)
Centre National de la Recherche Scientifique (CNRS)
Max-Planck-Gesellschaft
Instituto Geográfico Nacional (IGN)
Programme National Cosmology et Galaxies (PNCG)
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Commissariat à l'Energie Atomique (CEA)

Dates

Created
2021-05-19
Created from EPrint's datestamp field
Updated
2023-03-16
Created from EPrint's last_modified field