Mass inventory of the giant-planet formation zone in a solar nebula analog

Abstract

The initial mass distribution in the solar nebula is a critical input to planet formation models that seek to reproduce today's Solar System. Traditionally, constraints on the gas mass distribution are derived from observations of the dust emission from disks, but this approach suffers from large uncertainties in grain growth and gas-to-dust ratio. On the other hand, previous observations of gas tracers only probe surface layers above the bulk mass reservoir. Here we present the first partially spatially resolved observations of the ${}^{13}$C${}^{18}$O J=3-2 line emission in the closest protoplanetary disk, TW Hya, a gas tracer that probes the bulk mass distribution. Combining it with the C${}^{18}$O J=3-2 emission and the previously detected HD J=1-0 flux, we directly constrain the mid-plane temperature and optical depths of gas and dust emission. We report a gas mass distribution of 13${}_{-5}^{+8}\times$(R/20.5AU)${}^{-0.9_{-0.3}^{+0.4}}$ g cm${}^{-2}$ in the expected formation zone of gas and ice giants (5-21AU). We find the total gas/millimeter-sized dust mass ratio is 140 in this region, suggesting that at least 2.4M_earth of dust aggregates have grown to >centimeter sizes (and perhaps much larger). The radial distribution of gas mass is consistent with a self-similar viscous disk profile but much flatter than the posterior extrapolation of mass distribution in our own and extrasolar planetary systems.

Definitive version of the manuscript is published in Nature Astronomy, 10.1038/s41550-017-0130. This is the authors' version

References in corpus (11)

• A Submillimeter View of Circumstellar Dust Disks in $\rho$ Ophiuchus
• The ancient heritage of water ice in the solar system
• Structure and evolution of pre-main sequence circumstellar disks
• Evolution of Protoplanetary Discs with Magnetically Driven Disc Winds
• Constraining the X-ray and Cosmic Ray Ionization Chemistry of the TW Hya Protoplanetary Disk: Evidence for a Sub-interstellar Cosmic Ray Rate
• Three radial gaps in the disk of TW Hydrae imaged with SPHERE
• Protoplanetary disk masses from CO isotopologues line emission
• Formation of close in Super-Earths \& Mini-Neptunes: Required Disk Masses \& Their Implications
• Robustness of N2H+ as tracer of the CO snowline
• New Parallaxes and a Convergence Analysis for the TW Hya Association
• Measuring protoplanetary disk gas surface density profiles with ALMA

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