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Chemical Evolution in High-Mass Star-Forming Regions: Results from the MALT90 Survey
Sadia Hoq, James M. Jackson, Jonathan B. Foster +7
The chemical changes of high-mass star-forming regions provide a potential method for classifying their evolutionary stages and, ultimately, ages. In this study, we search for corr…
ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Hot Core and Molecular Outflows
Takeshi Sakai, Nami Sakai, Jonathan B. Foster +7
We have observed a cluster forming clump (MM3) associated with the infrared dark cloud G34.43+00.24 in the 1.3 mm continuum and the CH3OH, CS, 13CS, SiO, CH3CH2CN, and HCOOCH3 line…
Characterization of the MALT90 Survey and the Mopra Telescope at 90 GHz
Jonathan B. Foster, Jill M. Rathborne, Patricio Sanhueza +23
We characterize the Millimeter Astronomy Legacy Team 90 GHz (MALT90) Survey and the Mopra telescope at 90 GHz. We combine repeated position-switched observations of the source G300…
Distinct Chemical Regions in the "Prestellar" Infrared Dark Cloud (IRDC) G028.23-00.19
Patricio Sanhueza, James M. Jackson, Jonathan B. Foster +3
We have observed the IRDC G028.23-00.19 at 3.3 mm using CARMA. In its center, the IRDC hosts one of the most massive (~1520 Msun) quiescent, cold (12 K) clumps known (MM1). The low…