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High Resolution Millimeter Wave Images of HL Tau Reveal a Companion in the Disk

Published online by Cambridge University Press:  19 September 2017

William J. Welch ,
Zodiac Webster ,
Lee Mundy ,
Nikolaus Volgenau  and
Leslie. Looney
William J. Welch
Affiliation:
University of California, Astronomy Department, Berkeley, CA 94720, U.S.A.
Zodiac Webster
Affiliation:
University of California, Astronomy Department, Berkeley, CA 94720, U.S.A.
Lee Mundy
Affiliation:
University of Maryland, Astronomy Program, College Park, MD 20742, U.S.A.
Nikolaus Volgenau
Affiliation:
University of Maryland, Astronomy Program, College Park, MD 20742, U.S.A.
Leslie. Looney
Affiliation:
University of Illinois, Astronomy Department, 1002 W. Green St, Urbana, IL 61801, U.S.A.

Abstract

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An image of the disk of the TTauri star HL Tau at 1.4 mm wavelength at an angular resolution of 0.25 arcsec shows a secondary peak in the disk at a radius of 70 AU and position angle of −40°. This secondary peak is evidently a small unresolved nebulosity which may surround a star or planet or may not yet have formed such a body. The nebulosity could have formed as a result of a density wave instability in the disk.

Type
Extrasolar Planets
Information
Symposium - International Astronomical Union , Volume 213: Bioastronomy 2002: Life Among the stars , 2004 , pp. 59 - 64
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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