No Significant Correlation between Line-emission and Continuum Substructures in the Molecules with ALMA at Planet-forming Scales Program

Abstract

Recently, the Molecules with ALMA at Planet-forming Scales (MAPS) ALMA Large Program reported a high number of line emission substructures coincident with dust rings and gaps in the continuum emission, suggesting a causal link between these axisymmetric line emission and dust continuum substructures. To test the robustness of the claimed correlation, we compare the observed spatial overlap fraction in substructures with that from the null hypothesis, in which the overlap is assumed to arise from the random placement of line emission substructures. Our results reveal that there is no statistically significant evidence for a universal correlation between line emission and continuum substructures, questioning the frequently-made link between continuum rings and pressure bumps. The analysis also clearly identifies outliers. The chemical rings and the dust gaps in MWC 480 appear to be strongly correlated ($>4\sigma$), and the gaps in the CO isotopologues tend to moderately ($\sim 3\sigma$) correlate with dust rings.

8 pages, 3 figures, 2 tables, Accepted for publication in ApJL

References in corpus (16)

• Array Programming with NumPy
• Ring shaped dust accumulation in transition disks
• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Molecules with ALMA at Planet-forming Scales (MAPS) I: Program Overview and Highlights
• Meridional flows in the disk around a young star
• Molecules with ALMA at Planet-forming Scales (MAPS) V: CO gas distributions
• Protoplanetary disk rings and gaps across ages and luminosities
• CO Depletion in Protoplanetary Disks: A Unified Picture Combining Physical Sequestration and Chemical Processing
• Magnetic Flux Concentration and Zonal Flows in Magnetorotational Instability Turbulence
• The Sizes and Depletions of the Dust and Gas Cavities in the Transitional Disk J160421.7-213028
• The dry and carbon poor inner disk of TW Hya: evidence for a massive icy dust trap
• Survival of ALMA Rings in the Absence of Pressure Maxima
• If you like C/O variations, you should have put a ring on it
• The detection of dust gap-ring structure in the outer region of the CR Cha protoplanetary disk
• Self-consistent ring model in protoplanetary disks: temperature dips and substructure formation

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