2008/08/25 by Scott J. Wolk, F. Comerón, Wolk, Scott J. +5
Physics and Astronomy · #Astro and Planetary Science #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.0808.3383
13 pages. 6 figures (Figure image quality reduce). To be included in: Handbook of Star Forming Regions Vol. II. The Southern Sky Edited by B. Reipurth
arxiv created 2008/08/25 · openalex publication_date 2008/08/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Ara OB1a association is one of the closest sites where triggered star formation is visible for multiple generations of massive stars. At about 1.3 kpc distance, it contains complex environments including cleared young clusters, embedded infrared clusters, CO clouds with no evidence of star formation, and clouds with evidence of ongoing star formation. In this review we discuss the research on this region spanning the last half-century. It has been proposed that the current configuration is the result of an expanding wave of neutral gas set in motion between 10--40 million years ago in combination with photoionization from the current epoch.