The blast view of the star-forming region in aquila (ℓ = 45°, b = 0°)

Alana Rivera-Ingraham, Peter A.R. Ade, James J. Bock, Edward L. Chapin, Mark J. Devlin, Simon R. Dicker, Matthew Griffin, Joshua O. Gundersen, Mark Halpern, Peter C. Hargrave, David H. Hughes, Jeff Klein, Gaelen Marsden, Peter G. Martin, Philip Mauskopf, Calvin B. Netterfield, Luca Olmi, Guillaume Patanchon, Marie Rex, Douglas ScottChristopher Semisch, Matthew D.P. Truch, Carole Tucker, Gregory S. Tucker, Marco P. Viero, Donald V. Wiebe

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We have carried out the first general submillimeter analysis of the field toward GRSMC 45.46+0.05, a massive star-forming region in Aquila. The deconvolved 6 deg2(3° 2°) maps provided by BLAST in 2005 at 250, 350, and 500μm were used to perform a preliminary characterization of the clump population previously investigated in the infrared, radio, and molecular maps. Interferometric CORNISH data at 4.8 GHz have also been used to characterize the Ultracompact Hii regions (UCHiiRs) within the main clumps. By means of the BLAST maps, we have produced an initial census of the submillimeter structures that will be observed by Herschel, several of which are known Infrared Dark Clouds.Our spectral energy distributions of the main clumps in the field, located at ∼7 kpc,reveal an active population with temperatures of T ∼ 35-40 K and masses of ∼103M⊙ for a dust emissivity index β = 1.5. The clump evolutionary stages range from evolved sources, with extended Hii regions and prominent IR stellar population, to massive young stellar objects, prior to the formation of an UCHiiR. The CORNISH datahave revealed the details of the stellar content and structure of the UCHiiRs. In most cases, the ionizing stars corresponding to the brightest radio detections are capable of accounting for the clump bolometric luminosity, in most cases powered by embedded OB stellar clusters.

Original languageEnglish (US)
Pages (from-to)915-934
Number of pages20
JournalAstrophysical Journal
Issue number1
StatePublished - Nov 1 2010
Externally publishedYes


  • Balloons - ISM
  • Clouds - stars
  • Color figures
  • Formation - submillimeter
  • ISM Online-only material

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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