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From adaptive optics observations with the Palomar 5-meter telescope we placeupper limits on the masses of any planetary companions located between ~30-230AU away from Vega, where our data are sensitive to depths ranging from H=12.5mag to H=19.0 mag fainter than Vega itself. Our observations cover aplus-shaped area with two 25"x57" elements, excluding 7"x7" centered on thestar. We have identified 2 double and 4 single point sources. These projectedcompanions are 14.9-18.9 mag fainter than Vega, and if physically associatedwould have masses ranging from 4 to 35 Mjup and orbital radii 170-260 AU.Recent simulations of dusty rings around Vega predict the presence of aperturbing body with mass <2-3 Mjup and orbital radius ~40-100 AU, though moremassive (~10 Mjup) planets cannot be excluded. None of the detected objects arethis predicted planet. Based on a color-magnitude, spectroscopic, and propermotion analysis, all objects are consistent with being background sources.Given the glare of Vega, a 2 Mjup object near the expected orbital radii wouldnot have been visible at the 5-sigma level in our data, though any >10 Mjupbrown dwarf could have been seen at separation >80 AU.Comment: 16 pages, 1 table, 4 figures. Accepted for publication in Ap

Adaptive Optics Observations of Vega: Eight Detected Sources and Upper Limits to Planetary‐Mass Companions