ALMA Observations of Vibrationally Excited HC3N Lines Toward Orion KL

摘要: We present high spatial resolution ALMA observations of vibrational transitions HC3N toward Orion. KL in the 214-247 GHz frequency band. 41 7 vibrationally excited states, and 23 C-13 isotopologues 2 states are detected. The line images show that lines originate mainly from hot core Orion IRc7. emission peaks associated with move south to northeast as E-u increases. Based on multiple each state, we performed local thermodynamic equilibrium calculations XCLASS suite IRc7 positions. Generally, highly have higher rotational temperatures lower column densities. densities range 93 321. K, 1.0 x 10(14) 4.9 10(16) cm(-2), respectively. Lower ranging 88 186. K 3.2 cm(-2) obtained facts increasing Eu, higher-energy densities, appear support is externally heated. moving along major axis SiO outflow, which may indicate by interaction between pre-existing dense medium shocks generated outflows.