[1] This protostar is a binary star system surrounded by a molecular cloud in the Rho Ophiuchi star-forming region, which makes it an excellent target for ALMA’s millimetre/submillimetre view.

[2] The data used were from the ALMA Protostellar Interferometric Line Survey (PILS) led by Jes Jørgensen of the Niels Bohr Institute, University of Copenhagen. The aim of this survey is to chart the chemical complexity of IRAS 16293-2422 by imaging the full wavelength range covered by ALMA in the 0.8-millimetre atmospheric window on very small scales, equivalent to the size of the Solar System.

The species CF+, which could be considered as an organohalogen, had already been detected, but is not stable.