12-μm fine-structure emission line and continuum images of G333.6-0.2

Astronomy and Astrophysics – Astronomy

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Hii Regions, Ism: Individual: G333.6-0.2, Infrared: Ism: Continuum, Infrared: Ism: Lines And Bands

Scientific paper

We present high spatial resolution (~0.8 arcsec) diffraction-limited 12.8-μm Neii fine-structure emission line and 12.5-μm continuum images of the bright southern compact Hii region G333.6-0.2, taken with the mid-infrared imaging polarimeter NIMPOL. The two images show remarkably similar, compact, yet asymmetric, flux distributions. The [Neii] image shows a complex structure near the ionizing source(s) which we interpret in terms of the ionization structure of the Hii region. It is found that G333.6-0.2 is more likely to be excited by a cluster of O and B stars than by a single star.

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