SIMBAD references

2008ApJ...678L.109K - Astrophys. J., 678, L109-L112 (2008/May-2)

The ionization of accretion flows in high-mass star formation: W51e2.


Abstract (from CDS):

Previous observations show that the hypercompact H II region W51e2 is surrounded by a massive molecular accretion flow centered on the H II region. New observations of the H53α radio recombination line made with the VLA at 0.45" angular resolution show a velocity gradient in the ionized gas within the H II region of >500 km/s/pc comparable to the velocity gradient seen in the molecular accretion flow. New CO line observations made with the SMA at arcsecond angular resolution detect a molecular bipolar outflow immediately around the W51e2 H II region and extending along the axis of rotation of the molecular flow. These observations are consistent with an evolutionary phase of high-mass star formation in which a newly formed massive star first begins to ionize its surroundings including its own accretion flow.

Abstract Copyright:

Journal keyword(s): ISM: H II Regions

Simbad objects: 6

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