One-arcsecond-resolution millimetre-wave images enable the surface of the Orion Bar molecular cloud to be resolved, revealing a fragmented ridge of high-density substructures, photoablative gas flows and instabilities that suggest that the cloud edge has been compressed by a high-pressure wave expanding into the molecular cloud, in contrast to predictions from static equilibrium models.
- Javier R. Goicoechea
- Jérôme Pety
- Paolo Pilleri