The search for protostars using millimeter/submillimeter dust emission as a tracer

@article{Mezger1994TheSF,
  title={The search for protostars using millimeter/submillimeter dust emission as a tracer},
  author={Peter G. Mezger},
  journal={Astrophysics and Space Science},
  year={1994},
  volume={212},
  pages={197-214}
}
  • P. Mezger
  • Published 1 February 1994
  • Physics
  • Astrophysics and Space Science
In the disk of our Galaxy, about four solar masses of interstellar matter (ISM) per year are transformed into stars. Observations combined with evolutionary models (see also, e.g., Shu et al., 1987) suggest the following sequence of events for the formation of medium- and high-mass stars, which is illustrated by the Orion Giant Molecular Cloud (OMC; see Figure 1): 1. In an extended GMC of medium density (Figure 1a; nH ∼ 102 to 103 cm-3) a filament or ridge structure of increased density… 

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References

SHOWING 1-10 OF 30 REFERENCES

The internal structure of molecular clouds. III : Evidence for molecular depletion in the NGC 2024 condensations

Maps of the star forming region NGC2024 in the mm-wave transitions of C 34 S, C 17 O and C 18 O, obtained at the IRAM 30-m telescope, with angular resolutions of 21″ to 12″ are presented. Using the

Dust emission from star forming regions. II. The NGC 2024 cloud - core revisited.

A previous Paper (Mezger et al., 1988, Paper I) presented first observational evidence for the existence of six compact dust condensations in the dense NGC2024 cloud core. It was suggested that these

Galactic and extragalactic star formation

1 Galactic Star Formation.- 1.1 Lectures.- On the Importance of Outflows for Molecular Clouds and Star Formation.- Radio and Infrared Properties of Young Stars.- Energetic Winds and Circumstellar

CS multitransitional studies of density distribution in star-forming regions. I. The NGC 2071 region

The NGC 2071 molecular cloud was observed in the J = 2 to 1, 5 to 4, 6 to 5, and 7 to 6 transitions of the CS molecule with resolutions of 11 - 24 arcsec. The emission in all transitions peaks

Star Formation in Molecular Clouds: Observation and Theory

Star-formation (SF) processes occurring on the scale of giant molecular clouds (10 to the 6th solar masses and 10 to the 20th cm) or smaller are discussed, reviewing the results of recent theoretical

Dust emission from star-forming regions. III : The Rho Ophiuchus cloud―where are the low-mass protostars ?

We have surveyed the dust emission of the densest part of the Rho Oph cloud as outlined by C 18 O and DCO + line emission and have found three structureless cores of densities n H ∼4 10 5 −10 6 cm −3

Composite interstellar grains

The possibility that interstellar grains are composite collections of very small particles, loosely attached to one another, is investigated. The grains are assumed to include a substantial

The large system of molecular clouds in Orion and Monoceros

Emission is noted over about one-eighth of an 850-sq deg region centered on Orion and Monoceros that has been surveyed in the J = 1 to 0 line of CO; most of the emission arises from giant molecular

Observations of Star-Forming Regions with the Hat Creek Millimeter Array

The 3-element millimeter interferometer at the Hat Creek Radio Observatory has been used to map the molecular line emission from a wide range of star-forming regions, from dark clouds such as B5 and