A Circumstellar Disk in a Pre-main-sequence Binary Star

Details A Circumstellar Disk in a Pre-main-sequence Binary Star A Circumstellar Disk in a Pre-main-sequence Binary Star

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...507l.145k&link_type=abstract

The Astrophysical Journal, Volume 507, Issue 2, pp. L145-L148.

Astronomy and Astrophysics

Astronomy

65

Stars: Binaries: Visual, Stars: Circumstellar Matter, Methods: Observational, Stars: Individual: Constellation Name: Hk Tauri, Stars: Pre-Main-Sequence

Scientific paper

New high-resolution images of HK T Tauri B, the companion to the 10^6 yr old classical T Tauri star HK Tauri A, show it to be surrounded by an optically thick, edge-on circumstellar disk that extends to a radius of at least 50 AU. The images were taken using a modified speckle technique to achieve a linear resolution of 8 AU. The disk is strikingly coherent, showing no evidence of any strong perturbation by the primary star. The disk is illuminated by the central star, and it hides the star from direct view. The small changes in vertical thickness with wavelength require a dust + gas mass >~10^-3 M_solar. The relative position angles of the disk and the binary suggest that the disk probably does not lie in the plane of the binary orbit.

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