Observations of Co J = 2 ! 1 and 3 ! 2 Lines toward Extremely High Velocity Outflows
نویسنده
چکیده
We observed CO J = 2 ! 1 and J = 3 ! 2 lines toward several star formation regions with extremely high velocity (EHV) outtows: W3 IRS5, W28 A2, GL2591, S140, and Cepheus A. The full width of the wings are 90{235 km s ?1. Some wings show clear break of slope in the line proole implying that the nature of the EHV outtow is diierent from that of the high velocity outtow. We suggest that the EHV CO wing emission is tracing CO molecules in the stellar wind or jet which drives the high velocity outtow.
منابع مشابه
Extremely High Velocity Outflows
Extremely high velocity (EHV) wings, with full widths of 72 to 140 km s, are seen on the CO J = 3→2 lines toward W3 IRS 5, GL 490, NGC 2071, W28 A2 (G05.89–0.39), GL 2591, S140, and Cepheus A. Observations of CO and CO J = 3→2 and J = 2→1 lines indicate that optical depth generally decreases with increasing velocity separation from the ambient cloud velocity. Maps of the extremely high velocity...
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تاریخ انتشار 1996