AAS 199th meeting, Washington, DC, January 2002
Session 137. Topics in Stellar Evolution
Display, Thursday, January 10, 2002, 9:20am-4:00pm, Exhibit Hall

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[137.01] Mid-IR Imaging and Polarimetry of Highly Evolved Objects

C.A. Jurgenson, R.E. Stencel, D.S. Theil (University of Denver)

We present imaging and polarimetry observation results at selected mid-IR wavelengths taken with the University of Denver's TNTCAM2 at the Wyoming Infrared Observatory's 2.3 m aperture telescope. Post AGB objects include the luminous blue variable AFGL 2298, CW Leo and R CrB. Planetary Nebulae include the Butterfly Nebula M 2-9 and NGC 7027. The characteristics of spectral emission distribution, dust emissivity and magnetic field orientation based on spatial intensity distribution and polarization will be discussed. The objects were chosen for their advanced state of stellar evolution and evidence of resolved nebular structure. In reconstructing our chopped and nodded images, we used a constrained least squares technique called the projected Landweber Method based on work done by Bertero et al. PASP (2000) 112;1121-1137 and the adaptation of the technique by Linz et al. A&A 2002 (in preparation). We acknowledge helpful conversations with Craig Smith, and support for this work from NSF grant AST 9724506, and from the estate of William Herschel Womble.

The author(s) of this abstract have provided an email address for comments about the abstract: cjurgens@du.edu

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