Velocity gradients in the bipolar CO gas-flow around L 1551 IRS 5

Astronomy and Astrophysics – Astrophysics

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Carbon Monoxide, Gas Dynamics, Interstellar Gas, Polar Gases, Velocity Distribution, Herbig-Haro Objects, Molecular Clouds

Scientific paper

The authors report on high spatial resolution 12CO, J=1-0, observations of the bipolar gas-flow surrounding L1551 IRS5. The data indicate an apparent acceleration of the gas and abrupt velocity changes within the flow. In at least one case, such a velocity change is spatially coincident with an optical nebulosity. This supports the theory that some nebulosities in molecular clouds are the result of the interaction between a wind from a pre-main-sequence star and the surrounding medium.

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