Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...531..861g&link_type=abstract
The Astrophysical Journal, Volume 531, Issue 2, pp. 861-867.
Astronomy and Astrophysics
Astronomy
15
Ism: H Ii Regions, Ism: Individual (Ggd 12-15), Ism: Jets And Outflows, Radio Continuum: Stars
Scientific paper
We present sensitive Very Large Array (VLA) radio continuum observations at 3.6 cm toward the star-forming region GGD 14 (also known as GGD 12/13/14/15, G213.88-11.84, and AFGL 890). In addition to the previously known cometary H II region, we report the detection of a cluster of six compact radio sources, all with a nearby 2 μm counterpart. These new sources appear to be ultracompact H II regions ionized by B2-B3 zero-age main-sequence (ZAMS) stars. The kinematic age of these six compact radio sources, assuming expansion at 10 km s-1, is less than 25 yr, and we conclude that they must be confined by some mechanism. The sources are so compact that they could be gravitationally bound to the star. One of the new detections, the source VLA 7, is located near the center of the CO molecular outflow. We suggest that VLA 7 is associated with the powering source of the molecular outflow and that the infrared sources IRS 9M and IRS 9E, between which lies VLA 7, could be the lobes of a bipolar reflection nebula tracing the outflow at small scales.
Garay Guido
Gomez Yolanda
Rodriguez Luis F.
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