Differential rotation of the solar transition region from <i>STEREO</i>/EUVI 30.4-nm images

The solar photosphere, chromosphere and corona are known to rotate differentially as a function of latitude. To date, it is unclear if the transition region also rotates differentially. In this paper, we investigate differential rotational profile latitude, using full disk (SFD) images at 30.4 nm wavelength recorded by Extreme Ultraviolet Imager (EUVI) onboard Solar Terrestrial Relations Observatory (STEREO) space mission for period from 2008 2018 (Solar Cycle 24). Our investigations show that sidereal rotation rate obtained +/- 5 degree equatorial band quite high (~ 14.7 degree/day), which drops ~ 13.6 degree/day towards both polar regions. We obtain differentiality low during activity (rotation varies 14.86 14.27 degree/day) while increases ascending descending phases 24th cycle 14.56 13.56 in 14.6 13.1 2018). Average (over SFD) follows trend (maximum 14.97 peak phase activity, slowly decreases minimum 13.9 cycle). observe less than corona.