Channel maps of Hαemission from LAE1. Contours begin at 3σ and are in steps of 5σ. Each channel map covers a FoV of 1″ × 1″ and spans 0.002 μm, which corresponds to 160 km s⁻¹. The green ellipses indicate the location and extension of the two merging galaxies: LAE1a and LAE1b. The emission around these sources is not aligned in the same direction, which discards a rotation scenario.