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 α = +0.5 to +0.8, (where S ∝ ν ), 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 α = −0.4±0.2, consistent with a flat or slightly non-thermal spectrum. (Refer to PDF file for exact formulas).
Department, Program, or Center
School of Physics and Astronomy (COS)
Astronomical Journal 118N5 (1999) 2327-2330
RIT – Main Campus