Radio detections of stellar winds from the pistol star and other stars in the galactic center Quintuplet cluster

Very Large Array images of the Sickle and Pistol H II regions near the Gala ctic center at 8.3 and 4.9 GHz reveal six point sources in the region where the dense Quintuplet stellar cluster is located. The spectral indices of f ive of these sources between 6 and 3.6 cm have values of alpha = 0.5 to 0.8 (where S-v proportional to v(alpha)), consistent with the interpretation t hat the radio sources correspond to ionized stellar winds of the massive st ars in this cluster. The radio source associated with the Pistol star shows alpha = -0.4 +/- 0.2, consistent with a hat or slightly nonthermal spectru m.