High-contrast imaging in the Hyades with snapshot LOCI

Katie M. Morzinski; Bruce A. Macintosh; Laird M. Close; Christian Marois; Quinn Konopacky; Jenny Patience

doi:10.1117/12.926377

High-contrast imaging in the Hyades with snapshot LOCI

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

Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Scopus citations

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 language	English (US)
Title of host publication	Adaptive Optics Systems III
DOIs	https://doi.org/10.1117/12.926377
State	Published - 2012
Event	Adaptive Optics Systems III - Amsterdam, Netherlands Duration: Jul 1 2012 → Jul 6 2012

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8447
ISSN (Print)	0277-786X

Other

Other	Adaptive Optics Systems III
Country/Territory	Netherlands
City	Amsterdam
Period	7/1/12 → 7/6/12

Keywords

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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10.1117/12.926377

Cite this

@inproceedings{7a6c03bd14d147aab1e01a71d561c938,

title = "High-contrast imaging in the Hyades with snapshot LOCI",

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.",

keywords = "Adaptive optics, Brown dwarf, High-contrast imaging, Hyades, Image diversity, LOCI, PSF",

author = "Morzinski, {Katie M.} and Macintosh, {Bruce A.} and Close, {Laird M.} and Christian Marois and Quinn Konopacky and Jenny Patience",

year = "2012",

doi = "10.1117/12.926377",

language = "English (US)",

isbn = "9780819491480",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

booktitle = "Adaptive Optics Systems III",

note = "Adaptive Optics Systems III ; Conference date: 01-07-2012 Through 06-07-2012",

}

TY - GEN

T1 - High-contrast imaging in the Hyades with snapshot LOCI

AU - Morzinski, Katie M.

AU - Macintosh, Bruce A.

AU - Close, Laird M.

AU - Marois, Christian

AU - Konopacky, Quinn

AU - Patience, Jenny

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - Adaptive optics

KW - Brown dwarf

KW - High-contrast imaging

KW - Hyades

KW - Image diversity

KW - LOCI

KW - PSF

UR - http://www.scopus.com/inward/record.url?scp=84871769872&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84871769872&partnerID=8YFLogxK

U2 - 10.1117/12.926377

DO - 10.1117/12.926377

M3 - Conference contribution

AN - SCOPUS:84871769872

SN - 9780819491480

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Adaptive Optics Systems III

T2 - Adaptive Optics Systems III

Y2 - 1 July 2012 through 6 July 2012

ER -

High-contrast imaging in the Hyades with snapshot LOCI

Abstract

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Keywords

ASJC Scopus subject areas

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