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… 
AN INFRARED THROUGH RADIO STUDY OF THE PROPERTIES AND EVOLUTION OF IRDC CLUMPS
We examine the physical properties and evolutionary stages of a sample of 17 clumps within 8 Infrared Dark Clouds (IRDCs) by combining existing infrared, millimeter, and radio data with new Bolocam
MID-INFRARED EXTINCTION MAPPING OF INFRARED DARK CLOUDS. II. THE STRUCTURE OF MASSIVE STARLESS CORES AND CLUMPS
We develop the mid-infrared extinction (MIREX) mapping technique of Butler & Tan (Paper I), presenting a new method to correct for the Galactic foreground emission based on observed saturation in
The mass distribution of clumps within infrared dark clouds. A Large APEX Bolometer Camera study
Aims. We present an analysis of the dust continuum emission at 870 μm in order to investigate the mass distribution of clumps within infrared dark clouds (IRDCs). Methods. We map six IRDCs with the
The seeds of star formation in the filamentary infrared-dark cloud G011.11-0.12
Context. Infrared-dark clouds (IRDCs) are the precursors to massive stars and stellar clusters. G011.11–0.12 is a well-studied filamentary IRDC, though, to date, the absence of far-infrared data with
The Core Mass Function across Galactic Environments. II. Infrared Dark Cloud Clumps
We study the core mass function (CMF) within 32 dense clumps in seven infrared dark clouds (IRDCs) with the Atacama Large Millimeter/submillimeter Array via 1.3 mm continuum emission at a resolution
LABOCA 870 μm dust continuum mapping of selected infrared-dark cloud regions in the Galactic plane
Context. Imaging surveys of dust emission at (sub)millimetre wavelengths provide a powerful tool for studying molecular clouds and the early stages of star formation. Aims. Through submm dust
A statistical study of the mass and density structure of Infrared Dark Clouds
How and when the mass distribution of stars in the Galaxy is set is one of the main issues of modern astronomy. Here, we present a statistical study of mass and density distributions of infrared dark
VERY LARGE ARRAY OBSERVATIONS OF AMMONIA IN INFRARED-DARK CLOUDS. I. COLUMN DENSITY AND TEMPERATURE STRUCTURE
We present Very Large Array observations of NH3 (1,1) and (2,2) in a sample of six infrared-dark clouds (IRDCs) with distances from 2 to 5 kpc. We find that ammonia serves as an excellent tracer of
MAPPING LARGE-SCALE CO DEPLETION IN A FILAMENTARY INFRARED DARK CLOUD
Infrared Dark Clouds (IRDCs) are cold, high mass surface density and high density structures, likely to be representative of the initial conditions for massive star and star cluster formation. CO
Very large array observations of ammonia in infrared-dark clouds. II. internal kinematics
Infrared-dark clouds (IRDCs) are believed to be the birthplaces of rich clusters and thus contain the earliest phases of high-mass star formation. We use the Green Bank Telescope and Very Large Array
...
...

References

SHOWING 1-10 OF 69 REFERENCES
Molecular Line Observations of Infrared Dark Clouds: Seeking the Precursors to Intermediate and Massive Star Formation
We have identified 41 infrared dark clouds from the 8 μm maps of the Midcourse Space Experiment (MSX), selected to be found within 1 deg2 areas centered on known ultracompact H II regions. We have
Massive Quiescent Cores in Orion. II. Core Mass Function
We have surveyed submillimeter continuum emission from relatively quiescent regions in the Orion molecular cloud to determine how the core mass function in a high-mass star-forming region compares to
Infrared Dark Clouds: Precursors to Star Clusters
Infrared dark clouds (IRDCs) are dense molecular clouds seen as extinction features against the bright mid-infrared Galactic background. Millimeter continuum maps toward 38 IRDCs reveal extended cold
High-Mass Star Formation. I. The Mass Distribution of Submillimeter Clumps in NGC 7538
We present submillimeter continuum maps at 450 and 850 μm of a 12′ × 8′ region of the NGC 7538 high-mass star-forming region, made using the Submillimeter Common-User Bolometer Array (SCUBA) on the
Massive Clumps in the NGC 6334 Star-forming Region
We report observations of dust continuum emission at 1.2 mm toward the star-forming region NGC 6334 made with the SEST SIMBA bolometer array. The observations cover an area of ~2 deg2 with
Spitzer Observations of NGC 1333: A Study of Structure and Evolution in a Nearby Embedded Cluster
We present a comprehensive analysis of structure in the young, embedded cluster, NGC 1333 using members identified with Spitzer and 2MASS photometry based on their IR-excess emission. A total of 137
The Detection of Protostellar Condensations in Infrared Dark Cloud Cores
Infrared dark clouds (IRDCs) are a distinct class of interstellar molecular cloud identified as dark extinction features against the bright mid-infrared Galactic background. Here we present high
High mass star formation in the infrared dark cloud G11.11-0.12
We report detection of moderate to high-mass star formation in an infrared dark cloud (Gl 1.11-0.12) where we discovered class II methanol and water maser emission at 6.7 GHz and 22.2 GHz,
Outflow and Dense Gas Emission from Massive Infrared Dark Clouds
Infrared dark clouds are expected to harbor sources in different, very young evolutionary stages. To better characterize these differences, we observed a sample of 43 massive infrared dark clouds,
The Protostar in the Massive Infrared Dark Cloud IRDC 18223-3
At the onset of high-mass star formation, accreting protostars are deeply embedded in massive cores made of gas and dust. Their spectral energy distribution is still dominated by the cold dust and
...
...