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A Detailed Study of the GG Tau Circumbinary Disk

Published online by Cambridge University Press:  13 May 2016

Caer-Eve McCabe  and
Andrea M. Ghez
Caer-Eve McCabe
Affiliation:
UCLA Division of Astronomy and Astrophysics, Los Angeles CA 90095–1562, USA
Andrea M. Ghez
Affiliation:
UCLA Division of Astronomy and Astrophysics, Los Angeles CA 90095–1562, USA

Abstract

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We present near-infrared images of the circumbinary disk surrounding the pre–main-sequence binary star, GG Tau A, obtained with NICMOS aboard the Hubble Space Telescope. These images have a SNR ∼25 times higher than previous ground-based measurements, which allows the spatially resolved disk to be explored in detail. The geometry of the ring implies that the circumbinary disk is not intrinsically circular, possibly due to interactions with the central binary star. Overall, the circumbinary disk is redder than the central binary, with the amount of red excess increasing with wavelength. Significant variations in color over the 13 arcsec2 covered by the disk are also observed, raising the possibility that disk inhomogeneities are present.

Type
VII. Environments of Young Binaries - Direct Imaging
Information
Symposium - International Astronomical Union , Volume 200: The Formation of Binary Stars , 2001 , pp. 245 - 248
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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