Observations of CO J = 2 - 1 and 3 - 2 Lines Toward Extremely High Velocity Outflows

Astronomy and Astrophysics – Astronomy

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Scientific paper

The author observed CO J = 2→1 and J = 3→2 lines toward several star formation regions with extremely high velocity (EHV) outflows: W3 IRS5, W28 A2, GL2591, S140, and Cepheus A. The full width of the wings are 90 - 235 km s-1. Some wings show a clear break of the slope in the line profile implying that the nature of the EHV outflow is different from that of the high velocity outflow. He suggests that the EHV CO wing emission is tracing CO molecules in the stellar wind or jet which drives the high velocity outflow.

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