Gravitational fragmentation - A comparison with W49A

Details Gravitational fragmentation - A comparison with W49A Gravitational fragmentation - A comparison with W49A

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..639k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 20, 1991, p. 639-644. Research supported by NASA and University o

Astronomy and Astrophysics

Astrophysics

21

Fragmentation, Gravitational Effects, H Ii Regions, Molecular Clouds, Star Formation, Angular Momentum, Hydrodynamic Equations, Spectral Emission, Stellar Mass Accretion

Scientific paper

The process of gravitational fragmentation of molecular clouds is investigated through a comparison of numerical and observational results. The expected millimeter wave molecular line emission from a model fragmenting cloud generated by a numerical hydrodynamic simulation is calculated and compared with observations of HCO(+) from the star-forming region W49A. This investigation suggests that the rotating ring of H II regions, the necklace in W49A, may have formed in the gravitational fragmentation of a flattened rotating molecular cloud.

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