Extinction & Dust Associated with the Compact HII Region S88B

Details Extinction & Dust Associated with the Compact HII Region S88B Extinction & Dust Associated with the Compact HII Region S88B

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.0604g&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #06.04; Bulletin of the American Astronomical Society, Vol. 29, p.1216

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high spatial resolution infrared images of the inner arcminute of the compact HII region S88B (G61.5+0.1) in Br alpha (4.052 mu m) and Br gamma (2.167 mu m) lines, and in the polycyclic aromatic hydrocarbon features at 3.3 and 3.4 mu m. We examine a more extensive region (2arcmin by 2arcmin ) in broad band images at J (1.25 mu m), H (1.65 mu m) and K (2.23 mu m). The observations were performed at the Mt. Lemmon Observing Facility 1.5 m telescope with the University of Rochester Third Generation Infrared Camera. Assuming the Brackett line emission to be optically thin, a 10% number abundance of He (all HeII), and a power-law fit to the extinction (tau_ lambda ~ lambda (-alpha ) , alpha = 1.5 [Howard, et al. 1996]), we are able to map the extinction implied by our Br alpha and Br gamma emission images. We propose the 3.3 and 3.4 mu m emission outlines the PDR around the inner region of Brackett line emission.

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