Tomographic imaging of HL Tauri

Details Tomographic imaging of HL Tauri Tomographic imaging of HL Tauri

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...343..393b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 343, Aug. 1, 1989, p. 393-399.

Astronomy and Astrophysics

Astrophysics

53

Image Processing, Pre-Main Sequence Stars, Speckle Interferometry, Stellar Envelopes, Tomography, Cosmic Dust, Image Reconstruction, Star Formation, Stellar Luminosity, Stellar Mass Accretion, Stellar Structure

Scientific paper

A two-dimensional image of HL Tauri at 2.2 microns with 0.4-arcsec resolution is constructed from one-dimensional speckle-interferometric scans by means of tomographic back projection. The light distribution is dominated by scattered starlight above and below the midplane of the circumstellar disk of gas and dust. It is suggested that the scattering material is not associated directly with the disk but rather represents particles entrained in gas accreting onto the disk and star. The estimated mass accretion rate of 2 x 10 to the -6th solar mass/yr is in excellent accord with that expected from residual infall associated with the formation of the star.

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