First Scattered Light Images of Debris Disks around HD 53143 and HD 139664

@article{Kalas2006FirstSL,
  title={First Scattered Light Images of Debris Disks around HD 53143 and HD 139664},
  author={Paul Kalas and James R. Graham and Mark C. Clampin and Michael P. Fitzgerald},
  journal={The Astrophysical Journal Letters},
  year={2006},
  volume={637},
  pages={L57 - L60}
}
We present the first scattered light images of debris disks around a K star (HD 53143) and an F star (HD 139664) using the coronagraphic mode of the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). With ages of 0.3-1 Gyr, these are among the oldest optically detected debris disks. HD 53143, viewed ~45° from edge-on, does not show radial variation in disk structure and has a width >55 AU. HD 139664 is seen close to edge-on and has a beltlike morphology with a dust… 

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