| DOI | Trouver le DOI : https://doi.org/10.1117/12.926377 |
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| Auteur | Rechercher : Morzinski, Katie M.; Rechercher : Macintosh, Bruce A.; Rechercher : Close, Laird M.; Rechercher : Marois, Christian1; Rechercher : Konopacky, Quinn; Rechercher : Patience, Jenny |
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| Affiliation | - Conseil national de recherches du Canada. Infrastructure scientifique nationale
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| Format | Texte, Article |
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| Conférence | Adaptive Optics Systems III, July 1-6, 2012, Amsterdam, Netherlands |
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| Sujet | Brown dwarfs; High contrast imaging; Hyades; Image diversity; LOCI; PSF; Adaptive optics; Stars; Image processing |
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| Résumé | 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. |
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| Date de publication | 2012-09-13 |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21270303 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 2a4b182c-3c01-4e44-89cb-a9ece3c1f21e |
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| Enregistrement créé | 2014-01-22 |
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| Enregistrement modifié | 2020-04-21 |
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