1998ApJ...509..749H

In this fifth paper of a series on high-mass star formation, we continue our study with the bipolar nebula NS 14. We have imaged this nebula at J (1.23 µm), H (1.65 µm), and K (2.23 µm) broadband near-infrared (NIR) wavelengths. We have also obtained 3.29 µm dust feature emission and Brγ (n = 7 ⟶ 4, 2.166 µm) hydrogen recombination line emission images of this region. The broadband reflection nebulosity, surrounding a central ``Trapezium'' of stars, forms a bipolar structure that is also seen in the 3.29 µm dust feature emission. This dust feature emission exhibits limb brightening; therefore, small dust grains in the central regions of the bipolar structure have been evacuated. The Brγ line emission consists of a compact component ≤2" in size and a more extended component ∼5"x7" or larger in size. A study of the stellar population of the cluster, centered on the nebular emission, has also been made.