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

David J. Wilner | Zendy; Tyler L. Bourke | Zendy; C. M. Wright | Zendy; J. K. Jørgensen | Zendy; E. F. van Dishoeck | Zendy; Tony Wong | Zendy

Open Access

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

Author(s) -

David J. Wilner,

Tyler L. Bourke,

C. M. Wright,

J. K. Jørgensen,

E. F. van Dishoeck,

Tony Wong

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/377627

Subject(s) - physics , stars , astrophysics , telescope , wavelength , circumstellar disk , circumstellar envelope , astronomy , optics

We present observations of the young stars TW Hya and HD 100546 made with theAustralia Telescope Compact Array at 89 GHz with $\sim2''$ resolution and$\sim3$ mJy continuum sensitivity. Compact thermal dust continuum emission isdetected from disks surrounding both stars. HD 100546 also shows hints ofextended emission, presumably a residual protostellar envelope, which is alsovisible in scattered light at optical wavelengths. For TW Hya, HCO$^+$ J=1--0line emission from the circumstellar disk is detected and spatially resolved.The observed size and intensity are in good agreement with model calculationsbased on an irradiated disk with substantial depletions derived previously fromsingle dish observations of higher-J HCO$^+$ transitions.Comment: 19 pages including 6 figures; accepted for publication in Ap

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