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The nature of the compact HII region Sh 2-89 and its stellar content

We present an analysis of the structure and properties of the compact HII region Sh 2-89, and certain of the young stellar objects (YSOs) within this regime, using mid-infrared (MIR) mapping derived from the Spitzer Space Telescope (SST) and visual slit spectroscopy of the inner regions of the source. We show that the region has a bipolar structure, and contains a variety of Class I and II YSOs. Much of the MIR emission appears to be dominated by PAH emission bands, which cause strong increases in flux in the 5.8 and 8.0 microns photometric channels, whilst the variation of H_alpha, [NII] at 6583 A, [SII] at 6716+6731 A, and MIR emission profiles confirms the presence of complex ionisation fronts, and ionisation stratification.

preprint2010arXivOpen access
G. Ramos-LariosJ. P. PhillipsJ. A. Perez-Grana
astro-ph.GA
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G. Ramos-LariosJ. P. PhillipsJ. A. Perez-Grana

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