Disks around the Young Stars TW Hya and HD 100546 Imaged at 3.4 Millimeters with the Australia Telescope Compact Array

Abstract

We present observations of the young stars TW Hya and HD 100546 made with the Australia Telescope Compact Array at 89 GHz with $\sim 2^{\prime \prime }$ resolution and $\sim 3$ mJy continuum sensitivity. Compact thermal dust continuum emission is detected from disks surrounding both stars. HD 100546 also shows hints of extended emission, presumably a residual protostellar envelope, which is also visible in scattered light at optical wavelengths. For TW Hya, HCO${}^{+}$ J=1--0 line emission from the circumstellar disk is detected and spatially resolved. The observed size and intensity are in good agreement with model calculations based on an irradiated disk with substantial depletions derived previously from single dish observations of higher-J HCO${}^{+}$ transitions.

arXiv comment19 pages including 6 figures; accepted for publication in ApJ

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Cited by in corpus (38)

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• Constraining the X-ray and Cosmic Ray Ionization Chemistry of the TW Hya Protoplanetary Disk: Evidence for a Sub-interstellar Cosmic Ray Rate
• Volatile carbon locking and release in protoplanetary disks. A study of TW Hya and HD 100546
• Imaging the Disk around TW Hya with the Submillimeter Array
• X-ray irradiated protoplanetary disk atmospheres I: Predicted emission line spectrum and photoevaporation
• An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission
• Chemical Processes in Protoplanetary Disks II. On the importance of photochemistry and X-ray ionization
• Accretion Disks around Young Stars: Lifetimes, Disk Locking and Variability
• ALMA hints at the presence of two companions in the disk around HD 100546
• On the structure of the transition disk around TW Hya
• Emission Lines from the Gas Disk around TW Hydra and the Origin of the Inner Hole
• Spatially extended PAHs in circumstellar disks around T Tauri and Herbig Ae stars
• Five steps in the evolution from protoplanetary to debris disk
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• Resolving the disk rotation of HD 97048 and HD 100546 in the [O I] 6300A line: evidence for a giant planet orbiting HD 100546
• Investigating grain growth in disks around southern T Tauri stars at millimetre wavelengths
• Observations of Solids in Protoplanetary Disks
• Herschel-PACS observation of the 10 Myr old T Tauri disk TW Hya: Constraining the disk gas mass
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• Revisiting the "radial-drift barrier" of planet formation and its relevance in observed protoplanetary discs
• Measuring the Magnetic Field on the Classical T Tauri Star TW Hydrae
• Warm molecular gas and kinematics in the disc around HD 100546
• The TW Hya Rosetta Stone Project III: Resolving the Gaseous Thermal Profile of the Disk
• Search for Cold Debris Disks around M-dwarfs
• Search for Cold Debris Disks around M-dwarfs. II
• Resolved images of the protoplanetary disk around HD 100546 with ALMA
• A Resolved Circumstellar Disk around the Herbig Ae Star HD 100546 in the Thermal Infrared
• Resolving structure of the disk around HD100546 at 7 mm with ATCA
• Asymmetric mid-plane gas in ALMA images of HD~100546
• Size and density sorting of dust grains in SPH simulations of protoplanetary discs
• Gas Phase diagnostics of Protoplanetary disk extension
• New Spatially Resolved Mid-IR Observations of the Transitional Disk TW Hya and Tentative Evidence for a Self-Luminous Companion
• Growing dust grains in protoplanetary discs - I. Radial drift with toy growth models
• Size and density sorting of dust grains in SPH simulations of protoplanetary disc II: Fragmentation
• Science with MATISSE