FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3103831588> ?p ?o ?g. }

• W3103831588 endingPage "A118" @default.
• W3103831588 startingPage "A118" @default.
• W3103831588 abstract "Context. Photometric and astrometric monitoring of directly imaged exoplanets will deliver unique insights into their rotational periods, the distribution of cloud structures, weather, and orbital parameters. As the host star is occulted by the coronagraph, a speckle grid (SG) is introduced to serve as astrometric and photometric reference. Speckle grids are implemented as diffractive pupil-plane optics that generate artificial speckles at known location and brightness. Their performance is limited by the underlying speckle halo caused by evolving uncorrected wavefront errors. The speckle halo will interfere with the coherent SGs, affecting their photometric and astrometric precision. Aims. Our aim is to show that by imposing opposite amplitude or phase modulation on the opposite polarization states, a SG can be instantaneously incoherent with the underlying halo, greatly increasing the precision. We refer to these as vector speckle grids (VSGs). Methods. We derive analytically the mechanism by which the incoherency arises and explore the performance gain in idealised simulations under various atmospheric conditions. Results. We show that the VSG is completely incoherent for unpolarized light and that the fundamental limiting factor is the cross-talk between the speckles in the grid. In simulation, we find that for short-exposure images the VSG reaches a ∼0.3–0.8% photometric error and ∼3−10 × 10 −3 λ / D astrometric error, which is a performance increase of a factor ∼20 and ∼5, respectively. Furthermore, we outline how VSGs could be implemented using liquid-crystal technology to impose the geometric phase on the circular polarization states. Conclusions. The VSG is a promising new method for generating a photometric and astrometric reference SG that has a greatly increased astrometric and photometric precision." @default.
• W3103831588 created "2020-11-23" @default.
• W3103831588 creator A5007692296 @default.
• W3103831588 date "2020-06-01" @default.
• W3103831588 modified "2023-09-27" @default.
• W3103831588 title "Vector speckle grid: instantaneous incoherent speckle grid for high-precision astrometry and photometry in high-contrast imaging" @default.
• W3103831588 cites W1998987591 @default.
• W3103831588 cites W2009360693 @default.
• W3103831588 cites W2010025317 @default.
• W3103831588 cites W2011301426 @default.
• W3103831588 cites W2011756471 @default.
• W3103831588 cites W2032090543 @default.
• W3103831588 cites W2039683771 @default.
• W3103831588 cites W2047791794 @default.
• W3103831588 cites W2053125503 @default.
• W3103831588 cites W2053905548 @default.
• W3103831588 cites W2062830522 @default.
• W3103831588 cites W2068309608 @default.
• W3103831588 cites W2077403383 @default.
• W3103831588 cites W2077698911 @default.
• W3103831588 cites W2146292423 @default.
• W3103831588 cites W2288778377 @default.
• W3103831588 cites W2328428434 @default.
• W3103831588 cites W2510611702 @default.
• W3103831588 cites W2535542786 @default.
• W3103831588 cites W2604162648 @default.
• W3103831588 cites W2818066522 @default.
• W3103831588 cites W2900950862 @default.
• W3103831588 cites W3011000038 @default.
• W3103831588 cites W3098375344 @default.
• W3103831588 cites W3100418707 @default.
• W3103831588 cites W3100616375 @default.
• W3103831588 cites W3100694403 @default.
• W3103831588 cites W3100930630 @default.
• W3103831588 cites W3101022735 @default.
• W3103831588 cites W3101542983 @default.
• W3103831588 cites W3103804146 @default.
• W3103831588 cites W3105061413 @default.
• W3103831588 cites W3105587583 @default.
• W3103831588 cites W4288083928 @default.
• W3103831588 cites W4295815553 @default.
• W3103831588 doi "https://doi.org/10.1051/0004-6361/202037957" @default.
• W3103831588 hasPublicationYear "2020" @default.
• W3103831588 type Work @default.
• W3103831588 sameAs 3103831588 @default.
• W3103831588 citedByCount "6" @default.
• W3103831588 countsByYear W31038315882021 @default.
• W3103831588 countsByYear W31038315882022 @default.
• W3103831588 crossrefType "journal-article" @default.
• W3103831588 hasAuthorship W3103831588A5007692296 @default.
• W3103831588 hasBestOaLocation W31038315881 @default.
• W3103831588 hasConcept C102290492 @default.
• W3103831588 hasConcept C120665830 @default.
• W3103831588 hasConcept C121332964 @default.
• W3103831588 hasConcept C125245961 @default.
• W3103831588 hasConcept C132771110 @default.
• W3103831588 hasConcept C133286888 @default.
• W3103831588 hasConcept C133725777 @default.
• W3103831588 hasConcept C147789679 @default.
• W3103831588 hasConcept C150846664 @default.
• W3103831588 hasConcept C163479331 @default.
• W3103831588 hasConcept C184665706 @default.
• W3103831588 hasConcept C185592680 @default.
• W3103831588 hasConcept C205049153 @default.
• W3103831588 hasConcept C44870925 @default.
• W3103831588 hasConcept C68271606 @default.
• W3103831588 hasConcept C98444146 @default.
• W3103831588 hasConcept C99507719 @default.
• W3103831588 hasConceptScore W3103831588C102290492 @default.
• W3103831588 hasConceptScore W3103831588C120665830 @default.
• W3103831588 hasConceptScore W3103831588C121332964 @default.
• W3103831588 hasConceptScore W3103831588C125245961 @default.
• W3103831588 hasConceptScore W3103831588C132771110 @default.
• W3103831588 hasConceptScore W3103831588C133286888 @default.
• W3103831588 hasConceptScore W3103831588C133725777 @default.
• W3103831588 hasConceptScore W3103831588C147789679 @default.
• W3103831588 hasConceptScore W3103831588C150846664 @default.
• W3103831588 hasConceptScore W3103831588C163479331 @default.
• W3103831588 hasConceptScore W3103831588C184665706 @default.
• W3103831588 hasConceptScore W3103831588C185592680 @default.
• W3103831588 hasConceptScore W3103831588C205049153 @default.
• W3103831588 hasConceptScore W3103831588C44870925 @default.
• W3103831588 hasConceptScore W3103831588C68271606 @default.
• W3103831588 hasConceptScore W3103831588C98444146 @default.
• W3103831588 hasConceptScore W3103831588C99507719 @default.
• W3103831588 hasFunder F4320334678 @default.
• W3103831588 hasLocation W31038315881 @default.
• W3103831588 hasLocation W31038315882 @default.
• W3103831588 hasLocation W31038315883 @default.
• W3103831588 hasLocation W31038315884 @default.
• W3103831588 hasLocation W31038315885 @default.
• W3103831588 hasOpenAccess W3103831588 @default.
• W3103831588 hasPrimaryLocation W31038315881 @default.
• W3103831588 hasRelatedWork W2018034872 @default.
• W3103831588 hasRelatedWork W2031198725 @default.
• W3103831588 hasRelatedWork W2052948083 @default.
• W3103831588 hasRelatedWork W2166895919 @default.
• W3103831588 hasRelatedWork W2331284873 @default.

• next