Emission of sulfur dioxide molecules

 The coloured area is where ALMA detected emission of sulfur dioxide molecules toward G345.4938+01.4677. The colours indicate the velocity of the gas: blue shows it coming closer, while red shows it moving away. The colour distribution observed is characteristic of material rotating in protoplanetary disks around the protostar. The curved arrow shows the direction of the rotation, indicating that the stream material is ejected through the poles of the disk.