Physics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3081f&link_type=abstract
ATNF proposal C2322, Semester: April, 2010
Physics
Star Formation, Atca
Scientific paper
We propose to observe a small mosaic over the nearby, small stellar group-forming Ophiuchus A Core in NH3 (1,1) and (2,2) inversion emission at 23.7 GHz. Ophiuchus is our nearest source of ongoing, clustered star formation, allowing sensitive, high resolution observations of the physical conditions of dense gas associated with the formation of stellar groups. Through these observations, we will determine the kinetic temperature of the dense gas associated with this active star forming region, and study the distribution, kinematics and chemical differentiation of the Core at densities n ~ 10^4 cm^-3 where the NH3 lines are excited. We will use the derived temperatures to model the physical and chemical structure of embedded small-scale clumps within Oph A using radiative transfer codes, and compare the NH3 distribution with the thermal dust continuum and previously published N2H+ observations. These data are key to understanding the initial conditions of clustered star formation in Ophiuchus, and will help constrain models of dense core fragmentation and evolution in the Oph A Core.
Bourke Tyler
Caselli Paola
di Francesco James
Friesen Rachel
Myers Phil
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