The mid-infrared structure of the bipolar nebulae AFGL 915, AFGL 618, and AFGL 2688 |
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| Authors: | Joseph L Hora Lynne K Deutsch William F Hoffmann Giovanni G Fazio |
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| Institution: | (1) Institute for Astronomy, 2680 Woodlawn Drive, 96822 Honolulu, HI, USA;(2) FCAD/University of Massachusetts, 01003 Amherst, MA, USA;(3) Steward Observatory, University of Arizona, 85721 Tucson, AZ, USA;(4) Smithsonian Astrophysical Observatory, 60 Garden St., 02138 Cambridge, MA, U.K. |
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| Abstract: | We have obtained near diffraction-limited images of three bipolar PPN at UKIRT in October, 1993: AFGL 915 (the  Red Rectangle ), AFGL 618, and AFGL 2688 (the Egg Nebula). Images were taken at unidentified infrared (UIR) emission feature wavelengths and at several continuum wavelengths in the 10 and 20µm atmospheric windows. In all three PPN the emission is dominated by a central point source with fainter emission extending for several arcsec. In AFGL 2688, the mid-IR emission is extended in the same direction as the main optical lobes. In AFGL 915, the UIR feature emission is spatially separated from the central source. The spikes that have been observed at 2µm and give the nebula its rectangular appearance are also visible at 10µm. |
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| Keywords: | planetary nebulae: individual (AFGL 915 AFGL 618 AFGL 2688) planetary nebulae: General planetary nebulae: Infrared |
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