Influence of mid-infrared Galactic bubble on surroundings: A case study on IRAS 16489-4431

TL;DR

This study investigates how a massive star influences its surrounding gas and dust in a star-forming region, revealing a mid-infrared bubble driven by radiation pressure that triggers active star formation.

Contribution

It provides a multi-wavelength analysis demonstrating the impact of a massive star on bubble formation and subsequent star formation in IRAS 16489-4431.

Findings

The bubble is shaped by radiation pressure from a massive star.

Collected material along the bubble edge indicates active star formation.

Presence of dense cores and young stellar objects suggests triggered star formation.

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 {\it 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 bi-polar 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.