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We report on the results of a radio interferometric observation of NGC7027 inthe CO J=2-1 and 13CO J=2-1 lines. The results are analyzed withmorpho-kinematic models developed from the software tool Shape. Our goal is toreveal the morpho-kinematic properties of the central region of the nebula, andto explore the nature of unseen high-velocity jets that may have created thecharacteristic structure of the central region consisting of molecular andionized components. A simple ellipsoidal shell model explains the intensitydistribution around the systemic velocity, but the high velocity featuresdeviate from the ellipsoidal model. Through the Shape automatic reconstructionmodel, we found a possible trail of a jet only in one direction, but no otherpossible holes were created by the passage of a jet.

Three-Dimensional Structure of the Central Region of NGC7027: A Quest for Trails of High-Velocity Jets