10 AU scale halo structure around DG Tauri

Details 10 AU scale halo structure around DG Tauri 10 AU scale halo structure around DG Tauri

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387l..43c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 387, March 1, 1992, p. L43-L46. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

8

Halos, Star Formation, Stellar Envelopes, Stellar Structure, T Tauri Stars, Emission Spectra, Light Scattering, Molecular Clouds, Stellar Radiation

Scientific paper

Lunar occultation observations of the active T Tauri star DG Tau show that in the infrared K band it has a core-halo structure: 20-25 percent of the flux comes from a region 10 AU in extent and the rest from an unresolved core smaller than an AU. These results are consistent with those reported by Leinert et al. from a separate observation. The results obtained here and those of Leinert et al., measuring the intensity distribution projected along directions spanning roughly 40 deg, indicate that the resolved structure is not highly elongated. The extended emission is interpreted as star light scattered by optically thin dust located in a halo surrounding the star.

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