MUSE searches for galaxies near very metal-poor gas clouds at z~3: new constraints for cold accretion models

Abstract

We report on the search for galaxies in the proximity of two very metal-poor gas clouds at z~3 towards the quasar Q0956+122. With a 5-hour MUSE integration in a ~500x500 kpc^2 region centred at the quasar position, we achieve a >80% complete spectroscopic survey of continuum-detected galaxies with m<25 mag and Lyα emitters with luminosity L>3e41 erg/s. We do not identify galaxies at the redshift of a z~3.2 Lyman limit system (LLS) with log Z/Zsun = -3.35 +/- 0.05, placing this gas cloud in the intergalactic medium or circumgalactic medium of a galaxy below our sensitivity limits. Conversely, we detect five Lyα emitters at the redshift of a pristine z~3.1 LLS with log Z/Zsun < -3.8, while ~0.4 sources were expected given the z~3 Lyα luminosity function. Both this high detection rate and the fact that at least three emitters appear aligned in projection with the LLS suggest that this pristine cloud is tracing a gas filament that is feeding one or multiple galaxies. Our observations uncover two different environments for metal-poor LLSs, implying a complex link between these absorbers and galaxy halos, which ongoing MUSE surveys will soon explore in detail. Moreover, in agreement with recent MUSE observations, we detected a ~90 kpc Lyα nebula at the quasar redshift and three Lyα emitters reminiscent of a "dark galaxy" population.

arXiv comment12 pages, 5 figures. MNRAS in press

References in corpus (47)

• Astropy: A Community Python Package for Astronomy
• The chemical composition of the Sun
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Planck 2013 results. XVI. Cosmological parameters
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• How Do Galaxies Get Their Gas?
• EAZY: A Fast, Public Photometric Redshift Code
• Galaxy Bimodality due to Cold Flows and Shock Heating
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• Virial shocks in galactic haloes?
• The Structure and Kinematics of the Circum-Galactic Medium from Far-UV Spectra of z~2-3 Galaxies
• A Study of the Gas-Star Formation Relation over Cosmic Time
• Galaxies in a simulated $\Lambda$CDM Universe I: cold mode and hot cores
• The Fifth Data Release of the Sloan Digital Sky Survey
• Cold gas accretion in galaxies
• A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar
• The Gaseous Environment of High-z Galaxies: Precision Measurements of Neutral Hydrogen in the Circumgalactic Medium of z ~ 2-3 Galaxies in the Keck Baryonic Structure Survey
• Demographics and Physical Properties of Gas Out/Inflows at 0.4 < z < 1.4
• Absorption line systems in simulated galaxies fed by cold streams
• The Baryonic Assembly of Dark Matter Halos
• Improved redshifts for SDSS quasar spectra
• Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe
• Signatures of Cool Gas Fueling a Star-Forming Galaxy at Redshift 2.3
• A Population of Faint Extended Line Emitters and the Host Galaxies of Optically Thick QSO Absorption Systems
• The Bimodal Metallicity Distribution of the Cool Circumgalactic Medium at z<1
• The circumgalactic medium of massive galaxies at z~3: a test for stellar feedback, galactic outflows, and cold streams
• Detection of Pristine Gas Two Billion Years after the Big Bang
• The Small Covering Factor of Cold Accretion Streams
• The Direct Detection of Cool, Metal-Enriched Gas Accretion onto Galaxies at z ~ 0.5
• Neutral hydrogen in galaxy halos at the peak of the cosmic star formation history
• Cold accretion flows and the nature of high column density HI absorption at redshift 3
• Detection of dark galaxies and circum-galactic filaments fluorescently illuminated by a quasar at z=2.4
• Metal-enriched, sub-kiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy
• The VIMOS VLT Deep Survey: Star Formation Rate Density of Lya emitters from a sample of 217 galaxies with spectroscopic redshifts 2<z<6.6
• The physical properties of z>2 Lyman limit systems: new constraints for feedback and accretion models
• Evidence for Cold Accretion: Primitive Gas Flowing onto a Galaxy at z~0.274
• A Substantial Mass of Cool, Metal-Enriched Gas Surrounding the Progenitors of Modern-Day Ellipticals
• Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z=2-3
• The VLT LBG Redshift Survey - III. The clustering and dynamics of Lyman-break galaxies at z ~ 3
• Metal-Poor, Cool Gas in the Circumgalactic Medium of a z = 2.4 Star-Forming Galaxy: Direct Evidence for Cold Accretion?
• Calibrating Galaxy Redshifts Using Absorption by the Surrounding Intergalactic Medium
• Detectability of cold streams into high-redshift galaxies by absorption lines
• Directly imaging damped Ly-alpha galaxies at z>2. II: Imaging and spectroscopic observations of 32 quasar fields
• Detection of a redshift 3.04 filament
• The Incidence of Low-Metallicity Lyman-Limit Systems at z~3.5: Implications for the Cold-Flow Hypothesis of Baryonic Accretion
• The Building the Bridge survey for z=3 Ly-alpha emitting galaxies II: Completion of the survey
• Predominantly Low Metallicities Measured in a Stratified Sample of Lyman Limit Systems at z=3.7

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