Slim filaments in the CMZ. Panel a: MeerKAT 1.28 GHz radio emission of the Sgr A region. The red boxes mark the 20 km s⁻¹ cloud and the 50 km s⁻¹ cloud. Panels b–c: integrated intensity maps of SiO 5–4 in the 20 km s⁻¹ cloud and the 50 km s⁻¹ cloud from ALMA low-resolution (~1.9″) observations (project code: 2016.1.00875.S). The blue boxes mark zoom-in regions where slim filaments are detected. The dashed loops demonstrate the 50% primary beam of our ALMA high-resolution (~0.″23) observation. Panels d–g: SiO 5–4 emission of filaments from our ALMA high-resolution observations, which are integrated in velocity ranges of [−20, 40] and [25, 75] km s⁻¹ for the 20 km s⁻¹ cloud and the 50 km s⁻¹ cloud respectively. The pink dashed lines illustrate the identified slim filaments. The black contours present the ALMA 1.3 mm continuum emission at levels of [5, 25, 45] × 40 µJy beam⁻¹.