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Mid-infrared imaging of dust shells around young Planetary and Proto-Planetary Nebulae

Published online by Cambridge University Press:  25 May 2016

A. Dayal ,
W. F. Hoffmann ,
J. H. Bieging ,
J. L. Hora ,
L. K. Deutsch ,
G. G. Fazio ,
M. Meixner  and
C. J. Skinner
A. Dayal
Affiliation:
1Steward Observatory, Tucson, USA Institute for Astronomy, Honolulu, USA
W. F. Hoffmann
Affiliation:
1Steward Observatory, Tucson, USA Institute for Astronomy, Honolulu, USA
J. H. Bieging
Affiliation:
1Steward Observatory, Tucson, USA Institute for Astronomy, Honolulu, USA
J. L. Hora
Affiliation:
2Boston University, Boston, USA
L. K. Deutsch
Affiliation:
3Center for Astrophysics, Cambridge, USA
G. G. Fazio
Affiliation:
4University of Illinois, Urbana, USA
M. Meixner
Affiliation:
5Space Telescope Institute, Baltimore, USA
C. J. Skinner
Affiliation:
6Space Telescope Institute, Baltimore, USA

Extract

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The results presented here are from an ongoing mid-infrared imaging study of PPNe and PNe, using MIRAC2 the UA/SAO mid-IR camera. Our 8-21 μm observations have a spatial resolution of about 0.7″ to 1.5″, and a pixel scale of 0.25″/pixel (at UKIRT) or 0.34″/pixel (at IRTF). The high S/N and good spatial sampling in our images of IRAS 22272+5435 and IRAS 07134+1005 allow us to construct temperature and optical depth maps. Using our 11.7μm and 20.6μm images we also construct maps which isolate the 11.3μm (UIR) and 21μm emission features (Justannont et al. 1995). As a second part of this project, we are modelling the dust emission from PPNe and young PNe, using a axisymmetrical radiative transfer code.

Type
V. From AGB to Planetary Nebulae
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 347
Copyright
Copyright © Kluwer 1997 

References

Justannont, K., Barlow, M.J., Skinner, CJ., Roche, P.F., Aitken, D.K. & Smith, C.H. 1996, A&A, 309, 612.Google Scholar