Ammonia Temperatures of High-Mass Protostellar IRDC Cores

Details Ammonia Temperatures of High-Mass Protostellar IRDC Cores Ammonia Temperatures of High-Mass Protostellar IRDC Cores

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atnf.prop.1487b&link_type=abstract

ATNF proposal P632, Semester: April, 2008

Physics

Galactic, Parkes

Scientific paper

We propose to use the Parkes Telescope to measure the temperatures of a sample of high-mass protostellar cores in Infrared Dark Clouds using the NH3 (1,1), (2,2), and (3,3) lines as a thermometer. We have found that high-mass stars form in these IRDC cores. We speculate that the "active" cores, which show numerous signs of star formation, represent a later "hot-core" phase, whereas the "quiescent" cores, which show no signs of star formation, represent the earliest cold "pre-stellar" core phase. We will test this idea by measuring the NH3 rotational temperatures. We predict that "active" cores should have much larger rotational temperatures than "quiescent" cores. If confirmed, the identification of a large sample of high-mass "pre-stellar" cores would provide an important new source list for studies of high-mass star formation.

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