Radio Detections of Stellar Winds from the Pistol Star and Other Stars in the Galactic Center Quintuplet Cluster

Cornelia C. Lang(1,2), Don F. Figer(2), W.M. Goss(1), and Mark Morris(2)

(1) National Radio Astronomy Observatory, Box 0, Socorro, NM 87801, email:
(2) Division of Astronomy, 8371 Math Sciences Building, Box 951562, University of California at Los Angeles, LA, CA 90095-1562

Paper: to appear in the Astronomical Journal, Nov 1999

EPrint Server: astro-ph/9907176


VLA images of the Sickle and Pistol H II regions near the Galactic center at 3.6 and 6 cm reveal six point sources in the region where the dense Quintuplet stellar cluster is located. The spectral indices of five of these sources between 6 cm and 3.6 cm have values of alpha = +0.5 to +0.8, (where S_ nu \propto nu alpha ), consistent with the interpretation that the radio sources correspond to ionized stellar winds of the massive stars in this cluster. The radio source associated with the Pistol Star shows alpha = -0.4\p0.2, consistent with a flat or slightly non-thermal spectrum.

Preprints available from the authors at clang@zia.aoc.NRAO.EDU , or the raw TeX (no figures) if you click here.

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