2023/09/20 by Kelsey Glazer, Maruša Bradač, Glazer, Kelsey +19 · 1 citation
Chemistry · Physics and Astronomy · #Astrophysics and Star Formation Studies #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Spectroscopy and Laser Applications
paper · pdf · doi:10.48550/arxiv.2309.11548
openalex publication_date 2023/09/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on a \rm[CII]_158μ\rmm search using the Atacama Large Millimeter/submillimeter Array (ALMA) on three lensed, confirmed \lya emitting galaxies at z ∼ 7. Our targets are ultra-violet (UV) faint systems with stellar masses on the order of M* ∼ 109 M\odot. We detect a single [CII] line emission (4σ) from the brightest (L ∼ 2.4 × 1010L\odot) galaxy in our sample, MACS0454-1251. We determine a systemic redshift (z_\rm[CII] = 6.3151 ± 0.0005) for MACS0454-1251 and measure a \lya velocity offset of Δv ≈ 300 ± 70 \rmkm s-1. The remaining two galaxies we detect no \ct but provide 3 σ upper limits on their \ct line luminosities which we use to investigate the L_\textrm[CII] - \rmSFR relation. Overall our single \ct detection shows agreement with the relation for dwarf and local starburst galaxies. Our [CII] deficient galaxies could potentially be exhibiting low metallicities (Z