Compact Radio and Infrared Sources Near the Centre of the Bipolar Outflow NGC2264D

Astronomy and Astrophysics – Astronomy

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Scientific paper

A multi-frequency study of the central region of the bipolar outflow NGC 2264D in the Monoceros OB 1 molecular cloud has been made in an attempt to localize and understand its driving source. We have detected a weak (≅0.6 mJy) radio continuum source at 6 cm, using the VLA; a bright (≅270 Jy) H2O maser, using the Haystack Observatory telescope; and near-infrared counterparts to these sources at San Pedro Martir Observatory. Strömgren and JHKL'M photometry of stellar objects in the region was also carried out at this observatory. The star-like object W166, a probable Herbig Be/Ae star, which has strong Ha emission and a near-infrared excess, is located closest to the centroid of the bipolar outflow and is probably its driving source.

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