Disks around the young stars TW hydrae and HD 100546 imaged at 3.4 millimeters with the Australia Telescope Compact Array

D. J. Wilner, T. L. Bourke, C. M. Wright, J. K. Jørgensen, E. F. Van Dishoeck, T. Wong

Research output: Contribution to journalArticlepeer-review

Abstract

We present observations of the young stars TW Hya and HD 100546 made with the Australia Telescope Compact Array at 89 GHz with ∼2″ resolution and ∼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.

Original languageEnglish (US)
Pages (from-to)597-602
Number of pages6
JournalAstrophysical Journal
Volume596
Issue number1 I
DOIs
StatePublished - Oct 10 2003
Externally publishedYes

Keywords

  • Circumstellar matter
  • Planetary systems: protoplanetary disks
  • Stars: individual (TW Hydrae, HD 100546)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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