Water ice at the surface of HD 100546 disk

Abstract

We made near infrared multicolor imaging observations of a disk around Herbig Be star HD100546 using Gemini/NICI. K (2.2\,$\mu$m), H${}_2$O ice (3.06\,$\mu$m), and L'(3.8\,$\mu$m) disk images were obtained and we found the 3.1\,$\mu$m absorption feature in the scattered light spectrum, likely due to water ice grains at the disk surface. We compared the observed depth of the ice absorption feature with the disk model based on \cite{Oka2012} including water ice photodesorption effect by stellar UV photons. The observed absorption depth can be explained by the both disk models with/without photodesorption effect within the measurement accuracy, but slightly favors the model with photodesorption effects, implying that the UV photons play an important role on the survival/destruction of ice grains at the Herbig Ae/Be disk surface. Further improvement on the accuracy of the observations of the water ice absorption depth is needed to constrain the disk models.

accepted in ApJ

References in corpus (17)

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Cited by in corpus (22)

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• Candidate Water Vapor Lines to Locate the H${}_2$O Snowline through High-Dispersion Spectroscopic Observations I. The Case of a T Tauri Star
• Herbig Stars: A Quarter Century of Progress
• Dust continuum emission and the upper limit fluxes of sub-millimeter water lines of the protoplanetary disk around HD 163296 observed by ALMA
• ALMA 870 $\mu$m continuum observations of HD 100546. Evidence of a giant planet on a wide orbit
• Simulating Observations of Ices in Protoplanetary Disks
• Candidate Water Vapor Lines to Locate the ${\mathrm{H}}_2\mathrm{O}$ Snowline through High-dispersion Spectroscopic Observations. III. Submillimeter ${\mathrm{H}}_2$${}^{16}\mathrm{O}$ and ${\mathrm{H}}_2$${}^{18}\mathrm{O}$ Lines
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• Multi-Epoch Detections of Water Ice Absorption in Edge-on Disks around Herbig Ae Stars: PDS 144N and PDS 453
• Constraining the detectability of water ice in debris disks
• Detection of Near-Infrared Water Ice at the Surface of the (pre)Transitional Disk of AB Aur: Informing Icy Grain Abundance, Composition, and Size
• H${}_2$O distribution in the disc of HD 100546 and HD 163296: the role of dust dynamics and planet--disc interaction
• Ices in planet-forming disks: Self-consistent ice opacities in disk models
• Scattering polarization of 3-$\mu$m water-ice feature by large icy grains
• Untangling the Near-IR Spectral Features in the Protoplanetary Environment of KH 15D
• The role of absorption and scattering in shaping ice bands. Spatially-resolved spectroscopy of protoplanetary disks
• Multi-band reflectance and shadowing of RX J1604.3-2130 protoplanetary disk in scattered light
• Water vapor emission at the warm cavity wall of the HD 100546 disk as revealed by ALMA
• The formation of planetary systems with SPICA