Orion Nebula: [OI] 146 μm

The Orion Nebula was mapped by FIFI-LS at 146 μm to study the physical conditions of its atomic and molecular gas. The far infrared continuum (logarithmic scale) is shown peaking at the Becklin-Neugebauer object, but also clearly shows the Orion Bar and a similar structure to the north-east (left). Additionally, the [OI] line emission tracing the photon-dominated regions around the Trapezium stars where the star’s UV radiation irradiates the surrounding molecular cloud (right).

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