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A faint dust ring beyond the compact disk of Sz 76
Giulia Ricciardi, Anna Miotello, Karina Mauco +9
We report new ALMA Band 7 high-resolution (0.05) continuum and observations of the disk around the young low-mass star Sz 76. Visibil…
Empirical Constraints on the CO Snowline Transition in HD 163296: The Local CO Column and CO Optical Depth
Chunhua Qi, Takahiro Ueda, David J. Wilner +1
CO isotopologue emission is widely used to infer gas masses and volatile carbon abundances in protoplanetary disks, but converting line emission into a CO column depends on optical…
Large Dust Grains and a Possible Dust Trap in the Polar Circumbinary Disc of HD 98800B
Álvaro Ribas, Thomas Lack, Francesco Zagaria +6
HD 98800 is a nearby hierarchical quadruple system comprising two binaries orbiting each other. Surprisingly, despite its 10 Myr age and dynamic environment, the Ba-Bb compo…
Indications of Rapid Dust Formation in the Inner Region of a Protoplanetary Disk
Thanawuth Thanathibodee, Catherine Espaillat, Nuria Calvet +4
We report a significant increase in mid-infrared emission m in a transitional disk. The 2024 JWST/MIRI observation of the disk around CVSO 1942 reveals flux increase by…
Isotopic Ratios in the Disk of HD 163296
Chunhua Qi, David J. Wilner, Catherine C. Espaillat
Isotopic abundance ratios in protoplanetary disks are critical for understanding volatile inheritance and chemical evolution in planet-forming environments. We present Atacama Larg…
The edge-on disk Tau042021: icy grains at high altitudes and a wind containing astronomical PAHs
E. Dartois, J. A. Noble, M. K. McClure +9
Spectra of the nearly edge-on protoplanetary disks observed with the JWST have shown ice absorption bands of varying optical depths and peculiar profiles, challenging radiative tra…