Water Ice in the Edge-On Orion Silhouette Disk 114--426 from JWST NIRCam Images

Abstract

We examine images of the protoplanetary disk 114--426 with JWST/NIRCam in 12 bands. This large disk is oriented edge-on with a dark midplane flanked by lobes of scattered light. The outer edges of the midplane are seen in silhouette against the Orion Nebula, providing a unique opportunity to study planet-forming material in absorption. We discover a dip in the scattered light of the disk at 3\,$\micron$ -- compelling evidence for the presence of water ice. The 3\,$\micron$ dip is also seen in the silhouette of the disk, where we quantify the ice abundance with models of pure absorption and avoid the complications of disk scattering effects. We find grain ice-to-refractory mass ratios of up to $\sim$0.2, maximum grain sizes of 0.25 to 5\,$\micron$, and a total dust plus ice mass of 0.46\,$M_{\oplus }$ in the silhouette region. We also discover excess absorption in the NIRCam bands that include the Paschen $\alpha$ line, suggesting there may be excited atomic hydrogen in the disk. Examining the morphology of the scattered light lobes reveals that they are laterally offset from each other and exhibit a brightness asymmetry that flips with wavelength -- both evidence for a tilted inner disk in this system.

arXiv comment17 pages, 12 figures ApJ 979 110

References in corpus (25)

• Embedded Clusters in Molecular Clouds
• Water, O2 and Ice in Molecular Clouds
• Consistent dust and gas models for protoplanetary disks. I. Disk shape, dust settling, opacities, and PAHs
• An Ice Age JWST inventory of dense molecular cloud ices
• The stickiness of micrometer-sized water-ice particles
• Photodesorption of Ices II: H2O and D2O
• Exclusion of Cosmic Rays in Protoplanetary Disks: Stellar and Magnetic Effects
• Ices in the edge-on disk CRBR 2422.8-3423: Spitzer spectroscopy and Monte Carlo radiative transfer modeling
• Ice and Dust in the Quiescent Medium of Isolated Dense Cores
• ALMA Observations of the Orion Proplyds
• Can photo-evaporation trigger planetesimal formation?
• UV Radiation Fields Produced by Young Embedded Star Clusters
• CORINOS I: JWST/MIRI Spectroscopy and Imaging of a Class 0 protostar IRAS 15398-3359
• Evidence for dust grain growth in young circumstellar disks
• High-resolution near-infrared imaging of the Orion 114-426 silhouette disk
• A survey of H${}_2$O, CO${}_2$ and CO ice features towards background stars and low mass YSOs using AKARI
• The Villafranca catalog of Galactic OB groups. II. From Gaia DR2 to EDR3 and ten new systems with O stars
• Spatial study with the VLT of a new resolved edge-on circumstellar dust disk discovered at the periphery of the rho Ophiuchi dark cloud
• Photoevaporation and spatial variation of grain sizes in Orion 114-426
• Discovery of Crystallized Water Ice in a Silhouette Disk in the M43 Region
• Warm millimetre dust in protoplanetary discs near massive stars
• A JWST/MIRI analysis of the ice distribution and PAH emission in the protoplanetary disk HH 48 NE
• ALMA Observations of the Largest Proto-Planetary Disk in the Orion Nebula, 114-426: A CO Silhouette
• Adaptive Optics Observations of 3 micron Water Ice in Silhouette Disks in the Orion Nebula Cluster and M43
• Water ice: temperature-dependent refractive indexes and their astrophysical implications

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• Photometric Mapping of Carbonaceous/Siliceous Dust and Water Ice in the ISM with JWST: Applications to the Dense Sightlines
• PDRs4All XVIII. JWST-NIRCam Photometric properties of protoplanetary disks in the Orion Nebula Cluster
• JWST Imaging of Edge-on Protoplanetary Disks. V. Flux Ratio Reversal and Disk-edge Structure in the Flying Saucer