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Adaptive Optics Imaging of Circumstellar Environments

Published online by Cambridge University Press:  23 September 2016

Dániel Apai ,
Ilaria Pascucci ,
Hongchi Wang ,
Wolfgang Brandner ,
Thomas Henning ,
Carol Grady  and
Dan Potter
Dániel Apai
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17., Heidelberg, Germany D-69117
Ilaria Pascucci
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17., Heidelberg, Germany D-69117
Hongchi Wang
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17., Heidelberg, Germany D-69117
Wolfgang Brandner
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17., Heidelberg, Germany D-69117
Thomas Henning
Affiliation:
Max Planck Institute for Astronomy, Königstuhl 17., Heidelberg, Germany D-69117
Carol Grady
Affiliation:
NOAO/STIS, Goddard Space Flight Center, Code 681, NASA/GSFC, Greenbelt, MD 20771, USA
Dan Potter
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

Abstract

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We present results from our high-resolution, high-contrast imaging campaign targeting the circumstellar environments of young, nearby stars of different masses. The observations have been conducted using the ALFA/CA 3.5m and NACO UT4/VLT adaptive optics systems. In order to enhance the contrast we applied the methods PSF-subtraction and polarimetric differential imaging (PDI). The observations of young stars yielded the identification of numerous new companion candidates, the most interesting one being ∼ 0.5″ from FU Ori. We also obtained high-resolution near-infrared imaging of the circumstellar envelope of SU Aur and AB Aur. Our PDI of the TW Hya circumstellar disk traced back the disk emission as close as 0.1″ ≃ 6 AU from the star, the closest yet. Our results demonstrate the potential of the adaptive optics systems in achieving high-resolution and high-contrast imaging and thus in the study of circumstellar disks, envelopes and companions.

Type
Part 6: First Results from New Facilities
Information
Symposium - International Astronomical Union , Volume 221: Star Formation at High Angular Resolution , 2004 , pp. 307 - 312
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

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