Emission line maps within the field of view of MUSE-NFM (approximately 7.5″×7.5″) around Mk 34. Panel a: [NII] λ 6583 emission line map. Panel b: [SII] λ 6717 emission line map. We use the same intensity contours in both maps: contours range from 6 × 10⁻¹⁹ to 2 × 10⁻¹⁸ in steps of 2 × 10⁻¹⁹ erg s⁻¹ cm⁻² per spaxel. The MUSE-NFM image in the Johnson V band is shown in the background of both panels.