Abstract
The Br-alpha hydrogen recombination line is detected from the M supergiant IRS 7 in the Galactic center. The line strength appears to be stronger than expected for normal stellar processes. If the star lies within 0.6 pc of the Galactic center, the ionization can be explained as the effect of the ambient field of UV photons on the mass-loss wind of the star. This model requires that massive stars formed in the Galactic center in the last 10 Myr; it is then likely that they account for a significant portion of the luminosity and excitation of the central pc of the Galaxy.
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