Unveiling the most luminous Lyman-α emitters in the epoch of reionisation

Abstract

Distant luminous Lyman-alpha emitters are excellent targets for detailed observations of galaxies in the epoch of reionisation. Spatially resolved observations of these galaxies allow us to simultaneously probe the emission from young stars, partially ionised gas in the interstellar medium and to constrain the properties of the surrounding hydrogen in the circumgalactic medium. We review recent results from (spectroscopic) follow-up studies of the rest-frame UV, Lyman-alpha and [CII] emission in luminous galaxies observed ~500 Myr after the Big Bang with ALMA, HST/WFC3 and VLT/X-SHOOTER. These galaxies likely reside in early ionised bubbles and are complex systems, consisting of multiple well separated and resolved components where traces of metals are already present.

arXiv comment5 pages, 3 figures. Proceeding of IAU Symposium #352, 2019, "Uncovering early galaxy evolution in the ALMA and JWST era"

References in corpus (19)

• The Interstellar Medium In Galaxies Seen A Billion Years After The Big Bang
• Evidence for PopIII-like stellar populations in the most luminous Lyman-$\alpha$ emitters at the epoch of re-ionisation: spectroscopic confirmation
• Low-redshift Lyman continuum leaking galaxies with high [OIII]/[OII] ratios
• The assembly of "normal" galaxies at z=7 probed by ALMA
• Rotation in [CII]-emitting gas in two galaxies at a redshift of 6.8
• An Atlas of z=5.7 and z=6.5 Ly alpha Emitters
• An Intensely Star-Forming Galaxy at z~7 with Low Dust and Metal Content Revealed by Deep ALMA and HST Observations
• Intergalactic Transmission and its Impact on the Lyα Line
• Identification of the brightest Lyα emitters at z=6.6: implications for the evolution of the luminosity function in the re-ionisation era
• Tracing the reionization epoch with ALMA: [CII] emission in z~7 galaxies
• First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
• Kiloparsec-scale gaseous clumps and star formation at $z=5-7$
• Slicing COSMOS with SC4K: the evolution of typical Lya emitters and the Lya escape fraction from z~2 to z~6
• ALMA reveals metals yet no dust within multiple components in CR7
• Beacons into the Cosmic Dark Ages: Boosted transmission of Ly$\alpha$ from UV bright galaxies at $z\gtrsim 7$
• The Rest-Frame Optical Spectroscopic Properties of Ly$\alpha$-Emitters at $z\sim 2.5$: The Physical Origins of Strong Ly$\alpha$ Emission
• Spectroscopic properties of luminous Lyman-α emitters at $z\approx 6-7$ and comparison to the Lyman-break population
• An Ultraluminous Lyman Alpha Emitter with a Blue Wing at z=6.6
• On the nature and physical conditions of the luminous Lya emitter CR7 and its rest-frame UV components