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The study of the dynamic properties of bubbles in the interstellar medium isimportant for understanding the feedback mechanisms from star-formationprocesses in galaxies. The ongoing integral field spectroscopy of nearbystar-forming galaxies reveals many expanding bubbles and superbubblesidentified by the local increase in gas velocity dispersion. The limitedangular resolution often prevents bona fide measures of the expansionvelocities in galaxies outside the Local Group, even despite sufficientspectroscopic resolution. We present a method that makes it possible to measurethe expansion velocity of bubbles surrounding massive stars and clusters basedon the data about local variations in gas velocity dispersion. We adapt themethod for the Fabry-Perot interferometers used with the 6-m telescope of theSpecial Astrophysical Observatory of the Russian Academy of Sciences, as wellas for any integral field spectrograph with a Gaussian line spread function. Weapply the method described to analyze the kinematics of ionized superbubblesgas and the only known supernova remnant in the IC 1613 galaxy. The estimate ofthe kinematic age of the supernova remnant (on the order of 3100 years) agreeswell with the previously obtained independent estimate based on X-ray data.

Measurements of the Expansion Velocities of Ionized-Gas Superbubbles in Nearby Galaxies Based on Integral Field Spectroscopy Data