Abstract
We report 1″.9/300 km s −1 resolution imaging spectroscopy of He I n=2 1 P→n=2 1 S 2.06 μm line emission in the Galactic center. There is a group of about a dozen compact, broad-line He I emission-line stars most of which are positionally coincident with compact 2 μm continuum sources. IRS 16 and its broad-line region is probably a central concentration of this 1 pc diameter He I star cluster. The He I stars may be blue supergiants with heavy mass loss. The high He I/H I (Brα, Brγ) ratios suggest an overabundance of helium in their atmospheres indicative of a post-main-sequence phase.
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