2025ApJ...980L..43T

Query : 2025ApJ...980L..43T

2025ApJ...980L..43T - Astrophys. J., 980, L43 (2025/February-3)

The MUSE Ultra Deep Field: A 5 Mpc Stretch of the z ≈ 4 Cosmic Web Revealed in Emission.

TORNOTTI D., FUMAGALLI M., FOSSATI M., ARRIGONI BATTAIA F., BENITEZ-LLAMBAY A., DAYAL P., DUTTA R., PEROUX C., RAFELSKI M. and REVALSKI M.

Abstract (from CDS):

We detect Lyα emission from a ≈5 Mpc-long (comoving) portion of the cosmic web hosting an overdensity (δ ≈ 25) of 19 Lyα emitters (LAEs) at z ≈ 4 within the MUSE Ultra Deep Field (MUDF), reaching an average surface brightness (SB) of 5 × 10–20 erg s–1 cm–2 arcsec–2. This large-scale structure has an average SB similar to the filament across the two MUDF quasars at z ≈ 3.22. However, deep multiwavelength data do not show a clear presence of active galactic nuclei, suggesting that the emission is mainly regulated by the underlying gas density. We find ≈0.2 dex higher star formation compared to control samples and a remarkable predominance (5/7) of blue-peaked emission lines in the spectra of the embedded LAEs, indicative of favorable conditions for gas accretion. Lastly, we quantify the contribution of intragalactic gas to the Lyα SB profile at large distances from LAEs. By studying samples of filaments detected in emission within diverse environments, we are finally gaining new insight into the physics of gas accretion within the cosmic web.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galactic and extragalactic astronomy - Galaxy groups - Large-scale structure of the universe - Cosmic web - Intergalactic filaments

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME SSA22 Protocluster PCG 22 17 34.0 +00 17 01           ~ 175 0

Query : 2025ApJ...980L..43T

Basic data :
NAME SSA22 Protocluster -- Proto Cluster of Galaxies
Other object types: otypes_help 		PCG (1998ApJ)
ICRS coord. (ep=J2000) : 		22 17 34.0 +00 17 01 [ ] D 2005ApJ...634L.125M
FK4 coord. (ep=B1950 eq=1950) : 		22 15 00.3 +00 02 00 [ ]
Gal coord. (ep=J2000) : 		063.0882 -43.9920 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 266127 [~] / z(~) 3.1 [~] / cz 929357 [~]
   D 2005ApJ...634L.125M
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NAME SSA 22 Protocluster NAME SSA22 Protocluster EQ J221734.0+001701

References (175 between 1850 and 2026) (Total 175)
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