Imaging faint sources within a speckle halo with synchronous interferometric speckle subtraction

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The performance of high-contrast imaging systems is very often limited by the presence of speckles in the point-spread function (PSF) of the central source. Since this unwanted light is coherent with the central source, it is possible to make it interfere with light extracted from the center of the PSF. The light of a faint companion, however, will not interfere with the central source. By taking advantage of this fundamental difference, it is possible to detect faint companions superposed on speckles more than 100 times brighter, even if the speckles are rapidly "boiling." Possible optical designs to use this technique on interferometers or imaging telescopes are shown, and a data analysis algorithm is proposed. Synchronous interferometric speckle suppression greatly improves the performance of ground-based telescopes with adaptive optics systems for direct imaging of faint companions. On a space telescope, where the speckle lifetime is expected to be longer, companions 104 times fainter than the speckle halo can be detected in a few minutes.

Original languageEnglish (US)
Pages (from-to)562-572
Number of pages11
JournalAstrophysical Journal
Volume615
Issue number1 I
DOIs
StatePublished - Nov 1 2004
Externally publishedYes

Fingerprint

speckle
subtraction
halos
telescopes
point spread functions
coherent light
adaptive optics
boiling
interferometers
retarding
life (durability)
interferometer

Keywords

  • Instrumentation: Adaptive optics
  • Instrumentation: Interferometers methods: Data analysis
  • Techniques: Interferometric

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Imaging faint sources within a speckle halo with synchronous interferometric speckle subtraction. / Guyon, Olivier.

In: Astrophysical Journal, Vol. 615, No. 1 I, 01.11.2004, p. 562-572.

Research output: Contribution to journalArticle

@article{c71a27452aa24c1f88ebb058b8ea9f40,
title = "Imaging faint sources within a speckle halo with synchronous interferometric speckle subtraction",
abstract = "The performance of high-contrast imaging systems is very often limited by the presence of speckles in the point-spread function (PSF) of the central source. Since this unwanted light is coherent with the central source, it is possible to make it interfere with light extracted from the center of the PSF. The light of a faint companion, however, will not interfere with the central source. By taking advantage of this fundamental difference, it is possible to detect faint companions superposed on speckles more than 100 times brighter, even if the speckles are rapidly {"}boiling.{"} Possible optical designs to use this technique on interferometers or imaging telescopes are shown, and a data analysis algorithm is proposed. Synchronous interferometric speckle suppression greatly improves the performance of ground-based telescopes with adaptive optics systems for direct imaging of faint companions. On a space telescope, where the speckle lifetime is expected to be longer, companions 104 times fainter than the speckle halo can be detected in a few minutes.",
keywords = "Instrumentation: Adaptive optics, Instrumentation: Interferometers methods: Data analysis, Techniques: Interferometric",
author = "Olivier Guyon",
year = "2004",
month = "11",
day = "1",
doi = "10.1086/423980",
language = "English (US)",
volume = "615",
pages = "562--572",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1 I",

}

TY - JOUR

T1 - Imaging faint sources within a speckle halo with synchronous interferometric speckle subtraction

AU - Guyon, Olivier

PY - 2004/11/1

Y1 - 2004/11/1

N2 - The performance of high-contrast imaging systems is very often limited by the presence of speckles in the point-spread function (PSF) of the central source. Since this unwanted light is coherent with the central source, it is possible to make it interfere with light extracted from the center of the PSF. The light of a faint companion, however, will not interfere with the central source. By taking advantage of this fundamental difference, it is possible to detect faint companions superposed on speckles more than 100 times brighter, even if the speckles are rapidly "boiling." Possible optical designs to use this technique on interferometers or imaging telescopes are shown, and a data analysis algorithm is proposed. Synchronous interferometric speckle suppression greatly improves the performance of ground-based telescopes with adaptive optics systems for direct imaging of faint companions. On a space telescope, where the speckle lifetime is expected to be longer, companions 104 times fainter than the speckle halo can be detected in a few minutes.

AB - The performance of high-contrast imaging systems is very often limited by the presence of speckles in the point-spread function (PSF) of the central source. Since this unwanted light is coherent with the central source, it is possible to make it interfere with light extracted from the center of the PSF. The light of a faint companion, however, will not interfere with the central source. By taking advantage of this fundamental difference, it is possible to detect faint companions superposed on speckles more than 100 times brighter, even if the speckles are rapidly "boiling." Possible optical designs to use this technique on interferometers or imaging telescopes are shown, and a data analysis algorithm is proposed. Synchronous interferometric speckle suppression greatly improves the performance of ground-based telescopes with adaptive optics systems for direct imaging of faint companions. On a space telescope, where the speckle lifetime is expected to be longer, companions 104 times fainter than the speckle halo can be detected in a few minutes.

KW - Instrumentation: Adaptive optics

KW - Instrumentation: Interferometers methods: Data analysis

KW - Techniques: Interferometric

UR - http://www.scopus.com/inward/record.url?scp=10844231780&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10844231780&partnerID=8YFLogxK

U2 - 10.1086/423980

DO - 10.1086/423980

M3 - Article

AN - SCOPUS:10844231780

VL - 615

SP - 562

EP - 572

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 I

ER -