Imaging the HL Tauri disk at λ = 2.7 millimeters with the BIMA array

Lee G. Mundy, Leslie W. Looney, W. Erickson, A. Grossman, W. J. Welch, J. R. Forster, M. C.H. Wright, R. L. Plambeck, J. Lugten, D. D. Thornton

Research output: Contribution to journalArticle

Abstract

We have obtained a subarcsecond image of the disk associated with the T Tauri star HL Tau at a wavelength of 2.7 mm using the new high-resolution capability of the BIMA Array. The disk is elongated with a deconvolved Gaussian source size of 1″.0 ± 0″.2 × 0″.5 ± 0″.2, implying a semimajor axis of 70 ± 15 AU for a distance of 140 pc; the minor axis may be unresolved. The position angle of the major axis (125° ± 10°) is orthogonal to the axis of the optical jet. The disk centroid is coincident with the VLA λ = 3.6 cm source position and nearly coincident with recent measurements of the near-infrared emission peak. The λ = 2.7 mm images, along with previous interferometric measurements at λ = 0.87 mm and flux measurements from 10 μm to 1.3 cm, are well fitted by a simple power-law disk model with a shallow radial dependence to the surface density [Σ(r) ∝ r0 to r-1], an outer radius between 90 and 160 AU, and a dust opacity law proportional to ν1.

Original languageEnglish (US)
Pages (from-to)L169-L173
JournalAstrophysical Journal
Volume464
Issue number2 PART II
DOIs
StatePublished - Jun 20 1996
Externally publishedYes

Keywords

  • Circumstellar matter
  • Dust, extinction
  • Infrared: stars
  • Radio continuum: stars
  • Stars: formation
  • Stars: individual (HL Tauri)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Mundy, L. G., Looney, L. W., Erickson, W., Grossman, A., Welch, W. J., Forster, J. R., Wright, M. C. H., Plambeck, R. L., Lugten, J., & Thornton, D. D. (1996). Imaging the HL Tauri disk at λ = 2.7 millimeters with the BIMA array. Astrophysical Journal, 464(2 PART II), L169-L173. https://doi.org/10.1086/310117