Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21442204c&link_type=abstract
American Astronomical Society, AAS Meeting #214, #422.04; Bulletin of the American Astronomical Society, Vol. 41, p.691
Astronomy and Astrophysics
Astronomy
Scientific paper
The mechanisms for high-mass star formation are believed to be different from those for low-mass stars. To constrain these processes, we have an ongoing program to study massive quiescent cores in Orion (Li et al. 2003; Li et al. 2007; Velusamy et al. 2008). Based on single-dish 350 micron observations and also single-dish spectroscopy to estimate the temperature and degree of turbulence, Li et al. 2007 argued that many of these cores are supercritical, i.e. collapsing. We selected two of these possibly supercritical cores and observed them in N2H+ 1-0 using CARMA. N2H+ is believed to suffer less depletion than CO in the densest regions, making it an excellent molecule for tracing the dense core mass and gas dynamics. With our high resolution ( 1") observations, we resolve these cores into sub-structures, and model them in uv space to determine whether they are supercritical.
This research was supported by the Jet Propulsion Laboratory, California Institute of Technology.
Chapman Nicholas L.
Goldsmith Paul F.
Li Daming
Velusamy Thangasamy
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