We present Antarctic Submillimeter Telescope and Remote Observatory

• Main Authors: Sungeun Kim, Wilfred Walsh, Kecheng Xiao
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2004
• Subjects: — ISM; molecules; Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.314.8795; http://arxiv.org/pdf/astro-ph/0406197v1.pdf

(AST/RO) observations of 12 CO J = 4 → 3 and 12 [CI] emission in the N44 HII complex in the Large Magellanic Cloud. We detected strong 12 CO J = 4 → 3 emission toward the HII region called as N44BC, which is located on the rim of an expanding giant shell in the N44 region. Analysis with a photodissociation region (PDR) model showed that the 12 CO J = 4 → 3 emitting cloud is very dense, with n0 ≈ 10 5 cm −3. We also note that there is a high-velocity component associated with the 12 CO J = 4 → 3 emission. This probably originates from molecular material accelerated as a result of the motion induced by the expanding giant shell surrounding LH47 in the N44 complex. We found that the kinetic energy of this high-velocity gas observed in the CO J = 4 → 3 emission toward the rim of the expanding HII shell is at least an order of magnitude higher than the kinetic energy derived for the HI and HII gas in this region.