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Observations of the nebula associated with the WO star in the galaxy IC 1613are presented. The observations were carried out with a scanning InterferometerFabry-Perot in H_alpha at the 6m Special Astrophysical Observatory telescope;narrow-band H_alpha and [OIII] images were obtained with the 4-m KPNOtelescope. The monochromatic H_alpha image clearly reveals a giant bipolarshell structure outside the bright nebula S3. The sizes of the southeastern andnorthwestern shells are 112x77 pc and (186-192)x(214-224) pc, respectively. Wehave studied the object's kinematics for the first time and found evidence forexpansion of both shells. The expansion velocities of the southeastern andnorthwestern shells exceed 50 and 70 km/s, respectively. We revealed afilamentary structure of the shells and several compact features in the S3core. A scenario is proposed for the formation of the giant bipolar structureby the stellar wind from the central WO star located at the boundary of a dense``supercavity'' in the galaxy's H I distribution.Comment: 10 pages with 4 PS figure

A giant bipolar shell around the WO star in the galaxy IC 1613: Structure and kinematics