Showing 821 - 840 results of 918 for search '"adaptive optics"', query time: 0.19s Refine Results
  1. 821

    THE HYPERACTIVE L DWARF 2MASS J13153094–2649513: CONTINUED EMISSION AND A BROWN DWARF COMPANION by Burgasser, Adam J., Sitarski, Breann N., Gelino, Christopher R., Logsdon, Sarah E., Perrin, Marshall D.

    Published 2015
    “…Low-resolution near-infrared spectroscopy with the Infrared Telescope Facility/SpeX Spectrograph indicates the presence of a low-temperature companion, which is resolved through multi-epoch laser guide star adaptive optics imaging at the W. M. Keck Observatory. …”
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    Article
  2. 822

    Structural plasticity and network dynamics in the dorsal hippocampus - accumbal circuitry by Koren, V

    Published 2018
    “…This thesis entails the first full in vitro and in vivo proof of principle of a new approach toward minimally invasive high resolution deep brain imaging of dendritic spines utilising adaptive optics and holographic light propagation through a single optical fibre, thinner than a human hair. …”
    Thesis
  3. 823

    Uranus' cloud structure and seasonal variability from Gemini-North and UKIRT observations by Irwin, P, Teanby, N, Davis, G, Fletcher, L, Orton, G, Tice, D, Kyffin, A

    Published 2011
    “…Observations were acquired in Adaptive Optics mode and have a spatial resolution of approximately 0.1″ NIRI images were recorded with three spectral filters to constrain the overall appearance of the planet: J, H-continuum and CH4(long), and long slit spectroscopy measurements were also made (1.49-1.79μm) with the entrance slit aligned on Uranus' central meridian. …”
    Journal article
  4. 824

    Orbital and atmospheric characterization of the planet within the gap of the PDS 70 transition disk by Müller, A, Keppler, M, Henning, T, Samland, M, Chauvin, G, Beust, H, Maire, A, Molaverdikhani, K, vanBoekel, R, Benisty, M, Boccaletti, A, Bonnefoy, M, Cantalloube, F, Charnay, B, Baudino, J, Gennaro, M, Long, Z, Cheetham, A, Desidera, S, Feldt, M, Fusco, T, Girard, J, Gratton, R, Hagelberg, J, Janson, M, Lagrange, A, Langlois, M, Lazzoni, C, Ligi, R, Menard, F, Mesa, D, Meyer, M, Molliere, P, Mordasini, C, Moulin, T, Pavlov, A, Pawellek, N, Quanz, S, Ramos, J, Rouan, D, Sissa, E, Stadler, E, Vigan, A, Wahhaj, Z, Weber, L, Zurlo, A

    Published 2018
    “…We aim to characterize the orbital and atmospheric properties of PDS 70 b, which was first identified on May 2015 in the course of the SHINE survey with SPHERE, the extreme adaptive-optics instrument at the VLT. Methods. We obtained new deep SPHERE/IRDIS imaging and SPHERE/IFS spectroscopic observations of PDS 70 b. …”
    Journal article
  5. 825

    The 3D Kinematics of the Orion Nebula Cluster. II. Mass-dependent Kinematics of the Inner Cluster by Lingfeng Wei, Christopher A. Theissen, Quinn M. Konopacky, Jessica R. Lu, Chih-Chun Hsu, Dongwon Kim

    Published 2024-01-01
    “…High-precision radial velocities and surface temperatures are retrieved from spectra acquired by the NIRSPEC instrument used with adaptive optics (NIRSPAO) on the Keck II 10 m telescope. …”
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    Article
  6. 826

    Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA). SDSS J1608+2716: A Subarcsecond Quadruply Lensed Quasar at z = 2.575 by Junyao Li, Xin Liu, Yue Shen, Masamune Oguri, Arran C. Gross, Nadia L. Zakamska, Yu-Ching Chen, Hsiang-Chih Hwang

    Published 2023-01-01
    “….″25) based on selection from Gaia astrometry and follow-up Keck adaptive optics–assisted integral field unit spectroscopy. …”
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    Article
  7. 827

    Recent advances in optical imaging through deep tissue: imaging probes and techniques by Seokchan Yoon, Seo Young Cheon, Sangjun Park, Donghyun Lee, Yeeun Lee, Seokyoung Han, Moonseok Kim, Heebeom Koo

    Published 2022-10-01
    “…Methodologies of adaptive optics (AO) and studies of complex media have been established and have produced various techniques such as direct wavefront sensing to rapidly measure and correct the wave distortion and indirect wavefront sensing involving modal and zonal methods to correct complex aberrations. …”
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    Article
  8. 828

    Multistep ahead atmospheric optical turbulence forecasting for free-space optical communication using empirical mode decomposition and LSTM-based sequence-to-sequence learning by Yalin Li, Hongqun Zhang, Lang Li, Lang Li, Lang Li, Lu Shi, Lu Shi, Yan Huang, Shiyao Fu, Shiyao Fu, Shiyao Fu

    Published 2023-01-01
    “…Accurate prediction of atmospheric optical turbulence to optimize communication plans and equipment parameters, such as adaptive optics (AO), is an effective means to address this problem. …”
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    Article
  9. 829

    P141 COMPARISON BETWEEN TECHNIQUES OF EVALUATION MICROVASCULAR MORPHOLOGY: THE GOLD-STANDARD LOCALLY INVASIVE MICROMYOGRAPHY VS. THREE NON-INVASIVE TECHNIQUES. PRELIMINARY DATA by C. De Ciuceis, S. Caletti, M.A. Coschignano, C. Rossini, S. Duse, F. Docchio, S. Pasinetti, F. Zambonardi, F. Semeraro, G. Sansoni, C. Agabiti Rosei, P. Pileri, E. Agabiti Rosei, D. Rizzoni

    Published 2017-12-01
    “…However, non-invasive techniques for the evaluation of retinal arterioles were recently proposed, in particular two approaches seem to provide interesting information: Scanning Laser Doppler Flowmetry (SLDF) and adaptive optics (AO); both of them provide an estimation of the wall to lumen ratio (WLR) of retinal arterioles. …”
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    Article
  10. 830

    OGLE-2016-BLG-1195 AO: Lens, Companion to Lens or Source, or None of the Above? by Andrew Gould, Yossi Shvartzvald, Jiyuan Zhang, Jennifer C. Yee, Sebastiano Calchi Novati, Weicheng Zang, Eran O. Ofek

    Published 2023-01-01
    “…We systematically investigate Vandorou et al.’s claim to have detected the host star of the low-mass-ratio ( q < 10 ^−4 ) microlensing planet OGLE-2016-BLG-1195Lb, via Keck adaptive optics (AO) measurements Δ t = 4.12 yr after the event’s peak ( t _0 ). …”
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    Article
  11. 831

    A concept for seeing-limited near-IR spectroscopy on the Giant Magellan Telescope by Furesz, Gabor, Egan, Mark, Hellickson, Timothy H, Malonis, Andrew C., Simcoe, Robert A.

    Published 2017
    “…Such an instrument would allow GMT to pursue key early science programs on the Epoch of Reionization, galaxy formation, transient astronomy, and obscured star formation environments prior to commissioning of its adaptive optics system. This design study demonstrates the feasibility of developing relatively affordable spectrometers at the ELT scale, in response to the pressures of joint funding for these telescopes and their associated instrument suites.…”
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    Article
  12. 832

    The Multiplanet System TOI-421 by Ricker, George R, Vanderspek, Roland K, Seager, Sara, Fausnaugh, Michael, Guerrero, Natalia M., Mireles, Ismael, Niraula, Prajwal

    Published 2022
    “…We performed ground-based follow-up observations - comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echellé Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution chelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements - and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. …”
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    Article
  13. 833

    WHAT ASTEROSEISMOLOGY CAN DO FOR EXOPLANETS: KEPLER-410A b IS A SMALL NEPTUNE AROUND A BRIGHT STAR, IN AN ECCENTRIC ORBIT CONSISTENT WITH LOW OBLIQUITY by Van Eylen, V., Lund, Mikkel N., Aguirre, V. Silva, Arentoft, T., Kjeldsen, H., Albrecht, Simon H., Chaplin, William J., Isaacson, Howard, Pedersen, M. G., Jessen-Hansen, J., Tingley, B., Christensen-Dalsgaard, J., Aerts, C., Campante, T. L., Bryson, Stephen T.

    Published 2015
    “…Employing asteroseismology, using constraints from the transit light curve, adaptive optics and speckle images, and Spitzer transit observations, we demonstrate that the candidate can only be an exoplanet orbiting Kepler-410A. …”
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    Article
  14. 834

    Neptune's global circulation deduced from multi-wavelength observations by de Pater, I, Fletcher, L, Luscz-Cook, S, DeBoer, D, Butler, B, Hammel, H, Sitko, M, Orton, G, Marcus, P

    Published 2014
    “…Images were obtained at near-infrared wavelengths with NIRC2 coupled to the adaptive optics system in both broad- and narrow-band filters between 1.2 and 2.2 μ. …”
    Journal article
  15. 835

    Time variability of Neptune’s horizontal and vertical cloud structure revealed by VLT/SINFONI and Gemini/NIFS from 2009 to 2013 by Irwin, PGJ, Fletcher, LN, Tice, D, Owen, SJ, Orton, GS, Teanby, NA, Davis, GR

    Published 2016
    “…Image cubes in the J-band (1.09 – 1.41 μm) and H-band (1.43 – 1.87 μm) were obtained at spatial resolutions of 0.1″and 0.025″per pixel, while SINFONI’s adaptive optics provided an effective resolution of approximately 0.1″. …”
    Journal article
  16. 836

    Performance Enhancement of DWDM-FSO Optical Fiber Communication Systems Based on Hybrid Modulation Techniques under Atmospheric Turbulence Channel by Mohammed R. Hayal, Bedir B. Yousif, Mohamed A. Azim

    Published 2021-10-01
    “…We also propose to incorporate adaptive optics to mitigate the AT effect and improve the modulation efficiency. …”
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    Article
  17. 837

    Lamellar projections in the endolymphatic sac act as a relief valve to regulate inner ear pressure by Ian A Swinburne, Kishore R Mosaliganti, Srigokul Upadhyayula, Tsung-Li Liu, David G C Hildebrand, Tony Y -C Tsai, Anzhi Chen, Ebaa Al-Obeidi, Anna K Fass, Samir Malhotra, Florian Engert, Jeff W Lichtman, Tomas Kirchhausen, Eric Betzig, Sean G Megason

    Published 2018-06-01
    “…Using serial-section electron microscopy and adaptive optics lattice light-sheet microscopy, we find a pressure relief valve in the ES comprised of partially separated apical junctions and dynamic overlapping basal lamellae that separate under pressure to release fluid. …”
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    Article
  18. 838

    Atmospheric turbulence forecasting using two-stage variational mode decomposition and autoregression towards free-space optical data-transmission link by Yalin Li, Lang Li, Lang Li, Lang Li, Yingchi Guo, Yingchi Guo, Yingchi Guo, Hongqun Zhang, Shiyao Fu, Shiyao Fu, Shiyao Fu, Chunqing Gao, Chunqing Gao, Chunqing Gao, Ci Yin

    Published 2022-08-01
    “…Forecasting atmospheric turbulence allows for advanced scheduling of satellite-to-earth data transmission links, as well as the use of adaptive optics (AO) to compensate for turbulence effects and avoid data transmission link performance degradation. …”
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    Article
  19. 839

    Remodeling of Retinal Arterioles and Carotid Arteries in Heart Failure Development—A Preliminary Study by Janusz Sadowski, Ryszard Targonski, Piotr Cyganski, Paulina Nowek, Magdalena Starek-Stelmaszczyk, Katarzyna Zajac, Judyta Juranek, Joanna Wojtkiewicz, Andrzej Rynkiewicz

    Published 2022-06-01
    “…Retinal arterioles wall- to-lumen ratio (rWLR) was assessed by adaptive optics camera rtx1. The HF patients had higher IMTLR (Δ<sub>median</sub> [HFpEF–control group] 0.07, <i>p</i> = 0.01) and eWLR (Δ<sub>median</sub> 0.03, <i>p</i> = 0.001) in comparison to patients without HF. …”
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    Article
  20. 840