A cluster of radio near GGD 14

Gomez Y.; Rodríguez L.F.; Garay, G.

Abstract

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 ?m 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.

Más información

Título según SCOPUS: A cluster of radio near GGD 14
Título de la Revista: ASTROPHYSICAL JOURNAL LETTERS
Volumen: 531
Número: 2 PART 1
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2000
Página de inicio: 861
Página final: 867
Idioma: English
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-0037571821&partnerID=q2rCbXpz
Notas: SCOPUS