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 |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
aa38700-20(1).pdf | Pdf editoriale | 4.5 MB | Adobe PDF | View/Open |
Page view(s)
57
checked on Sep 11, 2024
Download(s)
12
checked on Sep 11, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.