A gas density drop in the inner 6 AU of the transition disk around the Herbig Ae star HD 139614 - Further evidence for a giant planet inside the disk?

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Fig. 3

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Observed composite of the normalized υ = 1 → 0 ¹²CO line-profile, photocenter, and PSF-FWHM. In red we show the same quantities produced by a flat disk model with a power-law intensity with R_in = 1.2 AU and R_out = 15 AU (black cross in Fig. 4). Error bars on the composite line-profile are 1σ. Horizontal dotted lines are the average 1σ errors in the +20 to +40 km s^-1 region. Note that this plot assumes a distance of 140 pc for HD 139614. Using the recently announced Gaia distance of 131 ± 5 pc, the mean of PSF-FWHM is 27 AU.

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