Mid-IR Spectral Features of Young Stars in the BD+40 4124 Region
Session 84 -- Star Forming Clouds
Display presentation, Wednesday, 11, 1995, 9:20am - 6:30pm

## [84.16] Mid-IR Spectral Features of Young Stars in the BD+40 4124 Region

L.K. Deutsch, M.A. Iyengar (FCAD/U.Mass.), J.L. Hora (IfA), W.F. Hoffmann, A. Dayal (U.of A.), H.M.Butner (DTM), G.G.Fazio (SAO)

We will present mid-IR images acquired with MIRAC (Mid-Infrared Array Camera) of four young stellar objects in the BD+40 4124 region of the Cygnus molecular cloud. Only BD+40 4124 had been previously identified as an emitter of the Unidentified InfraRed (UIR) emission features. Our mid-infrared images at 8.8, 10.3, 11.7, 12.5, and 17.2$\mu$~ resolve the two components of LkHa 225 and show that the southern component is the strongest UIR emitter in the region. This finding is confirmed by near-IR images of the region which we obtained with IRCAM at UKIRT. The near-IR images show that the northern source in LkHa 225 is much brighter at continuum wavelengths, while the southern source brightens considerably in the 3.3$\mu$~ UIR feature. The near-IR data also suggests the presence of connecting material between the two components of LkHa 225, raising the question of how two related objects can have significantly different circumstellar environments. A discussion the implications of our results will also be presented.