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Title: Does the debris disk around HD 32297 contain cometary grains?

We present an adaptive optics imaging detection of the HD 32297 debris disk at L' (3.8 μm) obtained with the LBTI/LMIRcam infrared instrument at the Large Binocular Telescope. The disk is detected at signal-to-noise ratio per resolution element ∼3-7.5 from ∼0.''3 to 1.''1 (30-120 AU). The disk at L' is bowed, as was seen at shorter wavelengths. This likely indicates that the disk is not perfectly edge-on and contains highly forward-scattering grains. Interior to ∼50 AU, the surface brightness at L' rises sharply on both sides of the disk, which was also previously seen at Ks band. This evidence together points to the disk containing a second inner component located at ≲50 AU. Comparing the color of the outer (50
Authors:
; ; ; ; ; ; ;  [1] ;  [2] ; ;  [3] ;  [4] ; ;  [5] ;  [6] ;  [7]
  1. Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
  2. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
  3. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171 (United States)
  4. University of Toronto, 50 St. George Street, Toronto, ON M5S 1A1 (Canada)
  5. School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287-1404 (United States)
  6. Large Binocular Telescope Observatory, University of Arizona, Tucson, AZ 85721 (United States)
  7. Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, VA 22903 (United States)
Publication Date:
OSTI Identifier:
22351384
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 783; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BRIGHTNESS; COLOR; COMPARATIVE EVALUATIONS; DENSITY; DETECTION; DISTRIBUTION; ICE; IMAGES; OPTICS; RESOLUTION; SCATTERING; SIGNAL-TO-NOISE RATIO; SPACE; SPECTRA; STARS; TELESCOPES; WATER