LARS XIII: High Angular Resolution 21 cm H i Observations of Lyα Emitting Galaxies

• DOI: 10.3847/1538-4357/ac77ed
• Publication Date: 2022-07-26T17:00:41Z
• Authors: Alexandra Le Reste; Matthew Hayes; John M. Cannon; Edmund Christian ...; Jens Melinder; Veronica Menacho; Göran Östlin; Johannes Puschnig; T. Emil Rivera-Th...; Daniel Kunth; Nick Velikonja
• Keywords: [SDU] Sciences of the Universe [physics]; 13. Climate action; Interacting galaxies; Lyman-alpha galaxies; 0103 physical sciences; Starburst galaxies; [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]; Interstellar atomic gas; Astrophysics - Astrophysics of Galaxies; 01 natural sciences

Abstract The Ly α emission line is one of the main observables galaxies at high redshift, but its output depends strongly on neutral gas distribution and kinematics around star-forming regions where UV photons are produced. We present observations 21 cm H i comparable scales with goal to qualitatively investigate how interstellar medium (ISM) properties impact transfer in galaxies. have observed highest possible angular resolution (≈3″ beam) Very Large Array two local from Lyman Alpha Reference Sample. compare these data Hubble Space Telescope imaging spectroscopy, Multi Unit Spectroscopic Explorer Potsdam MultiAperture Spectrophotometer ionized observations. In LARS08, high-intensity cospatial column density dust content lowest. redshifted, consistent a velocity redistribution that allows escape low content. eLARS01, located , below sensitivity limit ( < 2 × 10 20 −2 ). perturbed ISM front region plays an important role escape. both galaxies, faint (∼1×10 −16 erg s −1 arcsec ) traces intermediate found, regardless Dust seems modulate, not prevent, formation halo. This study suggests existence scaling relations between dust,