Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-09
Astrophys.J. 640 (2006) L29-L34
Astronomy and Astrophysics
Astrophysics
8 pages, 4 figures. To be appear on ApJL (accepted)
Scientific paper
10.1086/503301
We report the discovery of a rich population of low mass stars in the young, massive star forming region N66/NGC346 in the Small Magellanic Cloud, from deep V, I and H alpha images taken with the HST/ACS. These stars have likely formed together with the NGC346 cluster, ~3-5 Myr ago. Their magnitude and colors are those of pre-main sequence stars in the mass range 0.6-3 Mo, mostly concentrated in the main cluster, but with secondary subclusters spread over a region across ~45 pc. These subclusters appear to be spatially coincident with previously known knots of molecular gas identified in ground based and ISO observations. We show that N66/NGC346 is a complex region, being shaped by its massive stars, and the observations presented here represent a key step towards the understanding of how star formation occurred and has progressed in this low metallicity environment.
Clampin Marc
Gallagher John Jay
Mack Jennifer
Meixner Matthew
Nota Anatonella
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