Searching for Planets in Holey Debris Disks with the Apodizing Phase Plate

Abstract

We present our first results from a high-contrast imaging search for planetary mass companions around stars with gapped debris disks, as inferred from the stars' bright infrared excesses. For the six considered stars, we model the disks' unresolved infrared spectral energy distributions (SEDs) in order to derive the temperature and location of the disk components. With VLT/NaCo Apodizing Phase Plate coronagraphic L'-band imaging, we search for planetary mass companions that may be sculpting the disks. We detect neither disks nor companions in this sample, confirmed by comparing plausible point sources with archival data. In order to calculate our mass sensitivity limit, we revisit the stellar age estimates. One target, HD 17848, at 540$\pm$100 Myr old is significantly older than previously estimated. We then discuss our high-contrast imaging results with respect to the disk properties.

Accepted for publication in ApJ, 10 pages, 3 figures

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• The HOSTS survey: evidence for an extended dust disk and constraints on the presence of giant planets in the Habitable Zone of $\beta$ Leo
• Herschel Observations and Updated Spectral Energy Distributions of Five Sunlike Stars with Debris Disks
• An inner warp discovered in the disk around HD 110058 using VLT/SPHERE and HST/STIS
• Three new late-type stellar companions to very dusty WISE debris disks identified with VLT/SPHERE imaging
• Collisional parameters of planetesimal belts, precursor of debris disks, perturbed by a nearby giant planet