AAS Meeting #193 - Austin, Texas, January 1999
Session 71. Molecular Clouds
Display, Friday, January 8, 1999, 9:20am-6:30pm, Exhibit Hall 1

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[71.03] Extinction Associated with the Ultracompact HII Region, S88B

J.A. Goetz (U. Rochester), E.M. Howard (2MASS/Amherst), J.L. Pipher, W.J. Forrest (U. Rochester)

We present high spatial resolution mapping of the inner arcminute of the compact HII region S88B (G61.5+0.1) in Br \gamma (2.122 \micron) line emission and compare with 5 GHz radio continuum emission (Garay et al. 1993). On a larger scale (1\deg \times 0.5\deg), the stellar counts derived from Two Micron All Sky Survey (2MASS) images are used to determine the extent of the molecular cloud surrounding S88B. By varying the line-of-sight extinction, we fit a spectral type to stars appearing in J (1.25 \micron), H (1.65 \micron), K (2.23 \micron) and 3.3 \micron broad band images taken with the University of Rochester 3rd Generation Infrared Camera and compare with other extinction determinations.


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