We report the results of a direct imaging survey of A- and F-type main sequence stars searching for giant planets .
A/F stars are often the targets of surveys , as they are thought to have more massive giant planets relative to solar-type stars .
However , most imaging is only sensitive to orbital separations > 30 AU , where it has been demonstrated that giant planets are rare .
In this survey , we take advantage of the high-contrast capabilities of the Apodizing Phase Plate coronagraph on NACO at the Very Large Telescope .
Combined with optimized principal component analysis post-processing , we are sensitive to planetary-mass companions ( 2 to 12 M _ { Jup } ) at Solar System scales ( \leq 30 AU ) .
We obtained data on 13 stars in L ^ { \prime } -band and detected one new companion as part of this survey : an M 6.0 \pm 0.5 dwarf companion around HD 984 .
We re-detect low-mass companions around HD 12894 and HD 20385 , both reported shortly after the completion of this survey .
We use Monte Carlo simulations to determine new constraints on the low-mass ( < 80 M _ { Jup } ) companion frequency , as a function of mass and separation .
Assuming solar-type planet mass and separation distributions , normalized to the planet frequency appropriate for A-stars , and the observed companion mass-ratio distribution for stellar companions extrapolated to planetary masses , we derive a truncation radius for the planetary mass companion surface density of < 135 AU at 95 % confidence .