Detection of Multiple Bipolar Flows in NGC 7027 with Submillimeter Array
Kwok, Sun; Lim, Jeremy; Hirano, Naomi; Dinh-V-Trung; Huang, Zhen-Yuan; Hasegawa, Tatsuhiko I.; Muller, Sebastien; Muthu Mariappan, C.; Lyo, Aran
Taiwan, Vietnam, Hong Kong SAR, Sweden, India, South Korea
Abstract
Highly collimated multiple bipolar flows are detected with a 3'' resolution in the HCO+ (J = 3-2) and HCN (J = 3-2) lines in the young planetary nebula NGC 7027 with the Submillimeter Array. The HCO+ and HCN flows coincide in location and velocity with compact and fast CO flows detected with ~6'' resolutions with other millimeter arrays. The equatorial molecular torus of NGC 7027 is captured in HCO+ emission in the present observations. The HCO+ emission also closely follows the H2 emission, indicating that the present observations probe the photon-dominated region of the molecular envelope of NGC 7027.