Influence of Mid-infrared Galactic Bubble on Surroundings: A Case Study on IRAS 16489-4431

Abstract

We studied the influence of a massive star on a mid-infrared bubble and its surrounding gas in the IRAS 16489-4431 star-forming region using multi-wavelength data. The Spitzer mid-infrared band images revealed the shocked nature of the bubble. Analyses showed that the bubble is developed by a massive star owing to its strong radiation pressure. Evidence of collected material along the edge of the bubble was noted by the cold gas tracer line observed using Atacama Millimeter/submillimeter Array (ALMA). The presence of dense dust cores with bipolar outflows and young stellar objects toward the collected material is suggestive of active star formation possibly influenced by the expansion of the radiation driven bubble.