Now showing items 1-5 of 5

    • ALMA cycle 1 observations of the hh46/47 molecular outflow: structure, entrainment, and core impact 

      Zhang, Yichen; Arce, Héctor G.; Mardones Pérez, Diego; Cabrit, Sylvie; Dunham, Michael M.; Garay Brignardello, Guido; Noriega-Crespo, Alberto; Offner, Stella; Raga, Alejandro; Corder, Stuartt A. (The American Astronomical Society, 2016-12-01)
      We present Atacama Large Millimeter/sub-millimeter Array Cycle 1 observations of the HH 46/47 molecular outflow using combined 12 m array and Atacama Compact Array observations. The improved angular resolution and sensitivity ...
    • An ordered bipolar outflow from a massive early-stage core 

      Tan, Jonathan C.; Kong, Shuo; Zhang, Yichen; Fontani, Francesco; Caselli, Paola; Butler, Michael J. (The American Astronomical Society, 2016-04)
      We present ALMA follow-up observations of two massive, early-stage core candidates, C1-N and C1-S, in IRDC G028.37+00.07, that were previously identified by their N2D+(3-2) emission, and show high levels of deuteration of ...
    • Environment and Protostellar Evolution 

      Zhang, Yichen; Tan, Jonathan C. (IOP Publishing, 2015)
      Even today in our Galaxy, stars form from gas cores in a variety of environments, which may affect the properties of the resulting star and planetary systems. Here, we study the role of pressure, parameterized via ambient ...
    • Outflow-confined H II regions. I. First signposts of massive star formation 

      Tanaka, Kei; Tan, Jonathan; Zhang, Yichen (IOP PUBLISHING, 2016)
      We present an evolutionary sequence of models of the photoionized disk-wind outflow around forming massive stars based on the Core Accretion model. The outflow is expected to be the first structure to be ionized by the ...
    • The SOFIA massive (SOMA) star formation survey. I. Overview and first results 

      De Buizer, James M.; Liu, Mengyao; Tan, Jonathan C.; Zhang, Yichen; Beltrán, Maria T.; Shuping, Ralph; Staff, Jan E.; Tanaka, Kei E. I.; Whitney, Barbara (IOP Publishing Ltd., 2017)
      We present an overview and first results of the Stratospheric Observatory For Infrared Astronomy Massive (SOMA) Star Formation Survey, which is using the FORCAST instrument to image massive protostars from similar to 10 ...