High-contrast imaging in the Hyades with snapshot LOCI

Katie M. Morzinski, Bruce A. Macintosh, Laird M. Close, Christian Marois, Quinn Konopacky, Jennifer Patience

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


To image faint substellar companions obscured by the stellar halo and speckles, scattered light from the bright primary star must be removed in hardware or software. We apply the "locally-optimized combination of images" (LOCI) algorithm to 1-minute Keck Observatory snapshots of GKM dwarfs in the Hyades using source diversity to determine the most likely PSF. We obtain a mean contrast of 10-2 at 0.″01, 10-4 at <1″, and 10-5 at 5″. New brown dwarf and low-mass stellar companions to Hyades primaries are found in a third of the 84 targeted systems. This campaign shows the efficacy of LOCI on snapshot imaging as well as on bright wide binaries with off-axis LOCI, reaching contrasts sufficient for imaging 625-Myr late-L/early-T dwarfs purely in post-processing.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems III
StatePublished - 2012
EventAdaptive Optics Systems III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherAdaptive Optics Systems III


  • Adaptive optics
  • Brown dwarf
  • High-contrast imaging
  • Hyades
  • Image diversity
  • LOCI
  • PSF

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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