The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X

  title={The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X},
  author={Fr{\'e}d{\'e}rique Motte and Sylvain Bontemps and Peter Schilke and Nicola Schneider and Karl M. Menten and Dominique Brogui{\`e}re},
  journal={Astronomy and Astrophysics},
Aims. Our current knowledge of high-mass star formation is mainly based on follow-up studies of bright sources found by IRAS, and is thus biased against its earliest phases, inconspicuous at infrared wavelengths. We therefore started searching, in an unbiased way and in the closest high-mass star-forming complexes, for the high-mass analogs of low-mass pre-stellar cores and class 0 protostars. Methods.We have made an extensive 1.2 mm continuum mosaicing study of the Cygnus X molecular cloud… 
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