DETECTION OF STRUCTURE IN INFRARED-DARK CLOUDS WITH SPITZER: CHARACTERIZING STAR FORMATION IN THE MOLECULAR RING

@article{Ragan2009DETECTIONOS,
  title={DETECTION OF STRUCTURE IN INFRARED-DARK CLOUDS WITH SPITZER: CHARACTERIZING STAR FORMATION IN THE MOLECULAR RING},
  author={Sarah E. Ragan and Edwin Anthony Bergin and Robert A. Gutermuth},
  journal={The Astrophysical Journal},
  year={2009},
  volume={698},
  pages={324 - 349}
}
We have conducted a survey of a sample of infrared-dark clouds (IRDCs) with the Spitzer Space Telescope in order to explore their mass distribution. We present a method for tracing mass using dust absorption against the bright Galactic background at 8 μm. The IRDCs in this sample are comprised of tens of clumps, ranging in sizes from 0.02 to 0.3 pc in diameter and masses from 0.5 to a few 103M☉, the broadest dynamic range in any clump mass spectrum study to date. Structure with this range in… 

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