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Fig. 5

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The WISE All-Sky Survey Atlas images and IRAS Sky Survey Atlas (ISSA) for all the sources of our sample. The images are displayed per source (repented by the row heading) in order of survey, and the wavelength of observation from left to right (indicated by the column heading). Orientation for all images are north, up and east, left. The WISE images are 400′′ × 300′′ in size. The spatial resolution of the ISSA images at each wavelength are smoothed to the IRAS 100 μm beam size and are 900′′ × 900′′ in size. The black circles represent the IRAS 100 μm beam centered over the source positions. The sources and the wavelengths for which IRAS FSC upper limits are reported are indicted in the images. The four cold debris disks candidates with submm limits well below the SED fit are HIP 51658, HIP 61680 and HIP 76357 and HIP 112460, and are investigated for the possibility of contaminating sources within the IRAS beam. For HIP 51658, HIP 61680 and HIP 76357 nearby objects are visible in the higher resolution WISE images (see also Fig. 6). Additionally, for HIP 76357, the secondary companion (HIP 76382) is seen dominant in all WISE images and is noticeably seen in the 12 μm and 25 μm ISSA images. No contaminating sources are visible in either the WISE or ISSA images for HIP 112460.

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