| DOI | Resolve DOI: https://doi.org/10.1117/12.926377 |
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| Author | Search for: Morzinski, Katie M.; Search for: Macintosh, Bruce A.; Search for: Close, Laird M.; Search for: Marois, Christian1; Search for: Konopacky, Quinn; Search for: Patience, Jenny |
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| Affiliation | - National Research Council of Canada. National Science Infrastructure
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| Format | Text, Article |
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| Conference | Adaptive Optics Systems III, July 1-6, 2012, Amsterdam, Netherlands |
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| Subject | Brown dwarfs; High contrast imaging; Hyades; Image diversity; LOCI; PSF; Adaptive optics; Stars; Image processing |
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| 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. |
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| Publication date | 2012-09-13 |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270303 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2a4b182c-3c01-4e44-89cb-a9ece3c1f21e |
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| Record created | 2014-01-22 |
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| Record modified | 2020-04-21 |
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