Results 61 to 70 of about 1,832,653 (172)
The Astrophysical JournalA few ground-based solar coronagraphs have been installed in western China for observing the low-layer corona in recent years. However, determining the helioprojective coordinates for the coronagraphic data with high precision is an important but ...
Feiyang Sha +16 more
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, 2015 Detection and characterization of exoplanets by direct imaging requires a coronagraph designed to deliver high-contrast at small angular separation. To achieve this, an accurate control of low-order aberrations, such as pointing and focus errors, is ...
Vogt, Frederic +5 more
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The Astrophysical JournalAtmospheric aerosols strongly influence daytime sky quality for solar coronal imaging, yet few studies directly link aerosol properties and sky brightness measurements within ∼2° of the Sun. Here, we compare externally occulted coronagraphic measurements
Thomas A. Schad +7 more
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Speckle statistics in direct and coronagraphic imaging
, 2021 In this communication, we study the statistical properties of the light intensity in direct and coronagraphic images, in the context of ground-based Extreme Adaptive Optics observations.
Soummer, Rémi +4 more
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The Astronomical JournalPotentially habitable planets around nearby stars less massive than solar-type stars could join targets of the spectroscopy of the planetary reflected light with future space telescopes.
Satoshi Itoh +2 more
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The Planetary Science JournalWe present a calibrated database of reflectance spectra for the solar system planets (i.e., Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) and for Titan, spanning from the ultraviolet to the near infrared.
Allison Payne +7 more
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High-contrast Coronagraphic Techniques
, 2010 The direct detection of very faint companions to bright stars requires the development of effective high-contrast detection techniques, and the past decade has seen remarkable conceptual and instrumental progress in this area.
E. Serabyn
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The Astrophysical JournalHigh-precision ground-based observations of the inner corona (1.05–2.0 R _⊙ ) are fundamentally constrained by instrumental stray light, particularly the additive background from dynamic dust accumulation on the objective lens.
Xiande Liu +7 more
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New Measures of STEREO CME Masses and Directions
The Astrophysical JournalCoronal mass ejections (CMEs) propagate away from the Sun throughout interplanetary space. The CME mass influences its evolution and interaction with the background solar wind; however, accurate CME masses are not routinely measured.
C. Kay, A. Vourlidas, L. A. Balmaceda
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Diagnosing the Structure of the HD 163296 Protoplanetary Disk Via Coronagraphic Imaging Polarimetry
, 2008 Coronagraphic imaging polarimetry is a high contrast imaging technique which can diagnose both the spatial distribution and size distribution of dust grains which comprise primordial protoplanetary disks.
Kowalski, Adam F. +9 more
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