Faint LAEs near z>4.7 CIV absorbers revealed by MUSE

Abstract

We present the results from the search for Lyman Alpha emitters (LAEs) in the proximity of 11 CIV absorption systems at $z>4.7$ in the spectrum of the QSO J1030+0524, using data from MUSE. We have found multiple LAE candidates close to four CIV systems at $z_{CIV}=4.94$-5.74 with log${}_{10}$(N CIV[cm${}^{-2}$])$>\mathrm{13.5.}$ At z = 5-6, CIV systems with W0(CIV) $>0.2$ Å seem more likely to have galaxies with Ly$\alpha$ emission within $\rho <200$ proper kpc (4/5 cases), than the CIV systems with W0(CIV)$<0.2$ Å (0/6 cases). The impact parameter of LAE-CIV systems with equivalent widths W0(CIV)$>0.5$ Å is in the range 11 $<\rho <$ 200 proper kpc (pkpc). Furthermore, all candidates are in the luminosity range 0.18-1.15 L*$(Ly\alpha ,z=5.7)$ indicating that the environment of CIV systems within 200 pkpc is populated by the faint end of the Ly$\alpha$ luminosity function. We report a 0.28 L*$(Ly\alpha )$ galaxy at a separation of $\rho =10$ pkpc from a strong CIV absorption (log10(NCIV[cm${}^{-2}$]) = 14.52) at $z_{CIV}=5.72419$. The prevalence of sub-L*(Ly$\alpha$) galaxies in the proximity of z $>4.9$ CIV systems suggest that the absorbing material is rather young, likely ejected in the recent past of the galaxies at these redshifts. The connection between faint LAEs and high-ionization absorption systems reported in this work, is potentially a consequence of the role of low mass galaxies in the early evolution of the circum-galactic and intergalactic media.

21 pages, 23 figures, 3 tables. Submitted to MNRAS

References in corpus (38)

• Cosmic Star Formation History
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• Astrophysics Source Code Library
• The Circumgalactic Medium
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-Redshift Circumgalactic Medium
• Mass, Metal, and Energy Feedback in Cosmological Simulations
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
• Characterizing the Circumgalactic Medium of Nearby Galaxies with HST/COS and HST/STIS Absorption-Line Spectroscopy
• The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies
• The Low-z Intergalactic Medium. III. HI and Metal Absorbers at z<0.4
• Metal-line absorption around $z\approx$2.4 star-forming galaxies in the Keck Baryonic Structure Survey
• 3D Lyman-alpha radiation transfer. III. Constraints on gas and stellar properties of z~3 Lyman break galaxies (LBG) and implications for high-z LBGs and Lyman-alpha emitters(LAEs)
• A downturn in intergalactic CIV as redshift 6 is approached
• Simulating cosmic metal enrichment by the first galaxies
• Quasars Probing Galaxies: I. Signatures of Gas Accretion at Redshift Approximately 0.2
• The MUSE Hubble Ultra Deep Field Survey VI: The Faint-End of the Lya Luminosity Function at 2.91 < z < 6.64 and Implications for Reionisation
• The Rest-Frame Optical Spectroscopic Properties of Ly$\alpha$-Emitters at $z\sim 2.5$: The Physical Origins of Strong Ly$\alpha$ Emission
• Intergalactic CIV absorption at redshifts 5.4 to 6
• MUSE integral-field spectroscopy towards the Frontier Fields Cluster Abell S1063: I. Data products and redshift identifications
• A VLT/FORS2 view at $z\sim 6$: Lyman-$\alpha$ emitter fraction and galaxy physical properties at the edge of the epoch of cosmic reionization
• The primordial environment of super massive black holes: large scale galaxy overdensities around $z\sim 6$ QSOs with LBT
• The MUSE Hubble Ultra Deep Field Survey X. Ly$\alpha$ Equivalent Widths at $2.9<z<6.6$
• Low-metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z < 1
• On the minimum mass of reionization sources
• Properties of QSO Metal Line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and New Evidence on Escape of Ionizing Radiation from Galaxies
• A deep search for metals near redshift 7: the line-of-sight towards ULAS J1120+0641
• The Reionization of Carbon
• Large-scale environment of z~5.7 CIV absorption systems I: projected distribution of galaxies
• The Faint Host Galaxies of C IV Absorbers at z > 5
• Large-scale environment of $z\sim 5.7$ CIV absorption systems -II. Spectroscopy of Lyman-$\alpha$ emitters
• The VIMOS Ultra Deep Survey: The role of HI kinematics and HI column density on the escape of Lyalpha photons in star-forming galaxies at 2<z<4
• Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ~ 4-5 with MUSE
• The comoving mass density of MgII from $z\sim 2$ to $5.5$
• Simulated metal and HI absorption lines at the conclusion of Reionization
• Probing the Metal Enrichment of the Intergalactic Medium at $z=5-6$ Using the Hubble Space Telescope
• Theoretical study of an LAE-CIV absorption pair at z = 5.7

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• A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): JWST Discovers an Overdensity around a Metal Absorption-selected Galaxy at $z\sim 5.5$
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