Info

Compressed Cloud

Material flowing away . from Observer

Molecular Cloud

# Central Star

Je,i

Material flowing towards Observer

Compressed Cloud

Compressed Cloud

Fig 15.17.

Model for a bipolar flow. Material coming towards us on the near side of the cloud is blueshifted. Material going away from us on the far side of the cloud is redshifted. If the flow is not aligned along the line of sight, the redshifted and blueshifted emission will appear in different locations on the sky.

Stellar Wind1 —200 km/s

Accretion

Herbig-Haro Objects

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