Observations of Turbulence in Triggered Star Forming Regions

Details Observations of Turbulence in Triggered Star Forming Regions Observations of Turbulence in Triggered Star Forming Regions

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541423f&link_type=abstract

American Astronomical Society, AAS Meeting #215, #414.23; Bulletin of the American Astronomical Society, Vol. 42, p.258

Astronomy and Astrophysics

Astronomy

Scientific paper

A series of multi-wavelength observations over the past few years has resulted in the identification of a group of bright-rimmed clouds (BRCs) in which star formation has likely been triggered by radiative-driven implosion (RDI).
We present GBT observations of the ammonia (J,K)=(1,1) inversion transition in these BRCs. Our analysis supports an identification of RDI as a triggering mechanism for star formation in these sources. Results indicate significant variation in turbulent velocity dispersion. Suspected triggered sources show signs of shock passage through supersonic turbulence, while non-triggered sources tend to be more quiescent and subsonic.
We also find correlations between ionising radiation incident on the rim and rim shape, further supporting the hypothesis that rim morphology is related to environmental conditions and not a clear indicator of evolutionary development.

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