Two high-redshift galaxy candidates are reidentified as ultra-cool Y-type brown dwarfs at ~500 pc based on NIRSpec spectra matching templates and detected proper motions of 49 and 24 mas/yr.
http://ascl.net/1104.010 Pérez-González, P
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Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Ultra-cool Brown Dwarfs
Two high-redshift galaxy candidates are reidentified as ultra-cool Y-type brown dwarfs at ~500 pc based on NIRSpec spectra matching templates and detected proper motions of 49 and 24 mas/yr.