Older Upper Scorpius disks show reduced molecular emission and hints of higher inner-gas C/O ratios than young disks, indicating chemical evolution consistent with pebble drift.
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8 Pith papers cite this work. Polarity classification is still indexing.
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2026 8representative citing papers
A new grid of disk models with grain-surface CO chemistry plus an ML inference tool produces gas mass estimates from ALMA observations that match independent dynamical and HD values without requiring extreme elemental depletion.
A new implementation of radial rays and multigroup radiation transport in Athena++ for frequency-dependent stellar irradiation achieves 2-5% average temperature agreement with Monte Carlo benchmarks in hydrostatic disk models using 64 bands.
X-Shooter survey of 127 Upper Scorpius disks finds no correlation between accretion rate and disk dust mass or gas radius, with increased dispersion versus younger regions suggesting inner-outer disk decoupling.
ALMA survey detects H2CO in 45% of 20 disks and finds strong correlations of line luminosity with disk size, mass, and stellar luminosity, suggesting grain-surface formation.
Multi-wavelength data on V1094 Sco support a hybrid origin for its ring-gap structures consisting of planet-disk interaction at ~100 au and secular gravitational instability at 170-230 au in a low-turbulence disk.
Halos in Elias 2-24, IM Lup, and DM Tau hold 20-30% of total dust mass with cm-sized grains, helping resolve the disk mass-budget problem even though drift and growth timescales are shorter than disk ages.
ALMA observed 3933 independent coordinates in nearby star-forming regions for disks and planet formation, analyzed by sky location, frequency coverage, exposure time, spectral lines, and angular resolution.
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Dust characterization of halos: The extended emission in protoplanetary disks
Halos in Elias 2-24, IM Lup, and DM Tau hold 20-30% of total dust mass with cm-sized grains, helping resolve the disk mass-budget problem even though drift and growth timescales are shorter than disk ages.