Martin Cohen et al. 2007 ApJ 669 343 doi:10.1086/521427
Martin Cohen1, Quentin A. Parker2,3, Anne J. Green4, Tara Murphy4,5, Brent Miszalski2,6, David J. Frew2,7, Marilyn R. Meade8, Brian Babler8, Rémy Indebetouw9, Barbara A. Whitney10, Christer Watson11, Edward B. Churchwell8 and Douglas F. Watson8
Show affiliationsWe compare Hα, radio continuum, and Spitzer Space Telescope images of 58 planetary nebulae (PNe) recently discovered by the Macquarie-AAO-Strasbourg Hα PN Project (MASH) of the SuperCOSMOS Hα Survey. Using Infrared Array Camera (IRAC) data, we examine the relationships between optical and MIR morphologies from 3.6 to 8.0 μm and explore the ratio of mid-infrared (MIR) to radio nebular fluxes, which is a valuable discriminant between thermal and nonthermal emission. MASH emphasizes late evolutionary stages of PNe compared with previous catalogs, enabling study of the changes in MIR and radio flux that attend the aging process. Spatially integrated fluxes are constructed for all MASH PNe observed by the GLIMPSE Legacy Project, using the Hα morphologies to define the areas of MIR and radio continuum emission observed by the Midcourse Space Experiment (MSX), IRAC, the Molonglo Observatory Synthesis Telescope, and the Very Large Array (VLA). The ratio of IRAC 8.0 μm to MSX 8.3 μm fluxes provides an assessment of the absolute diffuse calibration of IRAC at 8.0 μm. We independently confirm the aperture correction factor to be applied to IRAC at 8.0 μm to align it with the diffuse calibration of MSX. The result is in accord with the recommendations of the Spitzer Science Center and with our results from a parallel study of H II regions in the MIR and radio. However, these PNe probe the diffuse calibration of IRAC on a spatial scale of 9''-77'', as opposed to the many-arcminute scale from the H II regions' study.
infrared: ISM; planetary nebulae: general; radiation mechanisms: thermal; radio continuum: ISM; space vehicles
Issue 1 (2007 November 1)
Received 2007 April 6, accepted for publication 2007 July 6
Martin Cohen et al. 2007 ApJ 669 343
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Frank Herrmann et al 2007 Class. Quantum Grav. 24 S33
Zhengquan Li et al 2005 Nanotechnology 16 2303
Nickolai Shaposhnikov and Lev Titarchuk 2009 ApJ 699 453
Aristophanes Dimakis and Folkert Müller-Hoissen 2007 J. Phys. A: Math. Theor. 40 F321
Vladimir R Tuz 2009 J. Opt. A: Pure Appl. Opt. 11 125103
Bahram Mobasher et al. 2001 ApJS 137 279