Formaldehyde Densitometry of Starburst Galaxies

@article{Mangum2008FormaldehydeDO,
  title={Formaldehyde Densitometry of Starburst Galaxies},
  author={Jeffrey G. Mangum and Jeremy Darling and Karl M. Menten and Christian Henkel},
  journal={The Astrophysical Journal},
  year={2008},
  volume={673},
  pages={832 - 846}
}
With a goal toward deriving the physical conditions in external galaxies, we present a survey of the formaldehyde emission in a sample of starburst systems. By extending a technique used to derive the spatial density in star formation regions in our own Galaxy, we show how the relative intensity of the 110-111 and 211-212 K-doublet transitions of H2CO can provide an accurate densitometer for the active star formation environments found in starburst galaxies. Relying on an assumed kinetic… 
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Densitometry and Thermometry of Starburst Galaxies
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With a goal toward deriving the physical conditions in external galaxies, we present a study of the ammonia (NH3) emission and absorption in a sample of star-forming systems. Using the unique
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Masers in starburst galaxies
  • J. Darling
  • Physics
    Proceedings of the International Astronomical Union
  • 2007
Abstract Masers in starburst galaxies are outstanding probes of a range of phenomena related to galaxy and black hole evolution, and offer unique high brightness temperature illumination that can be
Physical and chemical differentiation of the luminous star-forming region W49A. Results from the JCMT Spectral Legacy Survey
Context. The massive and luminous star-forming region W49A is a well-known Galactic candidate to probe the physical conditions and chemistry similar to those expected in external starburst galaxies.
Thermal formaldehyde emission in NGC 7538 IRS 1
Spectral lines from formaldehyde (H2CO) molecules at cm wavelengths are typically detected in absorption and trace a broad range of environments, from diffuse gas to giant molecular clouds. In
GALACTIC H2CO DENSITOMETRY. I. PILOT SURVEY OF ULTRACOMPACT H ii REGIONS AND METHODOLOGY
We present a pilot survey of 21 lines of sight toward ultracompact H ii (UCH ii) regions and three toward continuum-free lines of sight in the formaldehyde (H2CO) 110–111 (6 cm) and 211–212 (2 cm)
Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde II. The Large Magellanic Cloud
Context. The kinetic temperature of molecular clouds is a fundamental physical parameter affecting star formation and the initial mass function. The Large Magellanic Cloud (LMC) is the closest
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