Journal
ASTROPHYSICAL JOURNAL
Volume 755, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/755/1/59
Keywords
galaxies: starburst; galaxies: star clusters: general; galaxies: star clusters: individual (NGC 5253)
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Funding
- National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program [NNX-08AE38A]
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The nearby dwarf starburst galaxy NGC 5253 hosts a deeply embedded radio-infrared supernebula excited by thousands of O stars. We have observed this source in the 10.5 mu m line of S+3 at 3.8 km s(-1) spectral and 1 ''.4 spatial resolution, using the high-resolution spectrometer TEXES on the IRTF. The line profile cannot be fit well by a single Gaussian. The best simple fit describes the gas with two Gaussians, one near the galactic velocity with FWHM 33.6 km s(-1) and another of similar strength and FWHM 94 km s(-1) centered similar to 20 km s(-1) to the blue. This suggests a model for the supernebula in which gas flows toward us out of the molecular cloud, as in a blister or champagne flow or in the H II regions modelled by Zhu.
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