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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31784
Title: Three Lyman-α-emitting filaments converging to a massive galaxy group at z = 2.91: discussing the case for cold gas infall
Authors: Daddi, E.
Valentino, F.
Rich, R. M.
Neill, J. D.
Gronke, M.
O'Sullivan, D.
Elbaz, D.
Bournaud, F.
Finoguenov, A.
Marchal, A.
DELVECCHIO, IVAN 
Jin, S.
Liu, D.
STRAZZULLO, VERONICA 
CALABRO, ANTONELLO 
Coogan, R.
D'Eugenio, C.
Gobat, R.
Kalita, B. S.
Laursen, P.
Martin, D. C.
PUGLISI, Alfio Timothy 
Schinnerer, E.
Wang, T.
Issue Date: 2021
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 649
First Page: A78
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 × 10<SUP>13</SUP> M<SUB>⊙</SUB> dark matter halo, hosting 1200 M<SUB>⊙</SUB> yr<SUP>−1</SUP> 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....
URI: http://hdl.handle.net/20.500.12386/31784
URL: https://www.aanda.org/articles/aa/full_html/2021/05/aa38700-20/aa38700-20.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/202038700
Bibcode ADS: 2021A&A...649A..78D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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