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

Abstract

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 publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8447
DOIs
StatePublished - 2012
EventAdaptive Optics Systems III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Other

OtherAdaptive Optics Systems III
CountryNetherlands
CityAmsterdam
Period7/1/127/6/12

Fingerprint

High Contrast Imaging
Snapshot
Imaging techniques
Observatories
Speckle
Stars
Imaging
image contrast
Hardware
halos
observatories
hardware
Processing
Observatory
Post-processing
computer programs
Efficacy
stars
Star
Likely

Keywords

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

ASJC Scopus subject areas

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

Cite this

Morzinski, K. M., Macintosh, B. A., Close, L. M., Marois, C., Konopacky, Q., & Patience, J. (2012). High-contrast imaging in the Hyades with snapshot LOCI. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8447). [84470O] https://doi.org/10.1117/12.926377

High-contrast imaging in the Hyades with snapshot LOCI. / Morzinski, Katie M.; Macintosh, Bruce A.; Close, Laird M.; Marois, Christian; Konopacky, Quinn; Patience, Jennifer.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8447 2012. 84470O.

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

Morzinski, KM, Macintosh, BA, Close, LM, Marois, C, Konopacky, Q & Patience, J 2012, High-contrast imaging in the Hyades with snapshot LOCI. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8447, 84470O, Adaptive Optics Systems III, Amsterdam, Netherlands, 7/1/12. https://doi.org/10.1117/12.926377
Morzinski KM, Macintosh BA, Close LM, Marois C, Konopacky Q, Patience J. High-contrast imaging in the Hyades with snapshot LOCI. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8447. 2012. 84470O https://doi.org/10.1117/12.926377
Morzinski, Katie M. ; Macintosh, Bruce A. ; Close, Laird M. ; Marois, Christian ; Konopacky, Quinn ; Patience, Jennifer. / High-contrast imaging in the Hyades with snapshot LOCI. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8447 2012.
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