Rotation and Outflow in Compact H II Regions: VLA Observations of the Molecular and Ionized Gas in NGC 6334A and NGC 6334F

Details Rotation and Outflow in Compact H II Regions: VLA Observations of the Molecular and Ionized Gas in NGC 6334A and NGC 6334F Rotation and Outflow in Compact H II Regions: VLA Observations of the Molecular and Ionized Gas in NGC 6334A and NGC 6334F

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...447..220d&link_type=abstract

Astrophysical Journal v.447, p.220

Astronomy and Astrophysics

Astronomy

45

Ism: H Ii Regions, Ism: Individual Ngc Number: Ngc 6334, Ism: Jets And Outflows, Ism: Kinematics And Dynamics, Radio Sources: Lines

Scientific paper

Two compact components of the NGC 6334 star-forming region have been imaged in molecular and ionized gas at high spatial and spectral resolution with the Very Large Array. The H II region NGC 6334A has been imaged in the radio continuum at 6, 3.6, and 2 cm, and in the recombination lines H76α (2 cm) and H92α (3.6 cm). NGC 6334F has been imaged at 6 and 2 cm in the radio continuum, and in the H76α recombination line. Both components have been imaged in the JKK = 110 → 111 (6 cm) and JKK = 211 → 212 (2 cm) lines in H2CO absorption. Components A and F are separated by ˜11' (5.4 pc) along a star-forming ridge. In component A, high-resolution (˜3") continuum observations confirm the presence of a ˜15" diameter shell. Spectral observations of the ionized gas in component A at both frequencies show velocity gradients that are consistent with rotation in the ionized gas. In addition, a bipolar outflow is observed along the perpendicular axis into the "lobes" to the north and south of the compact core. In component F, there is a velocity gradient in the ionized gas that is along the same axis as the bipolar CO outflow observed by Bachiller & Cernicharo (1990). The H2CO absorption lines toward both components suggest outflow in the molecular gas.

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