Results 81 to 90 of about 1,731,322 (198)

A Comprehensive Spectroscopic Reference of the Solar System and Its Application to Exoplanet Direct Imaging

The Planetary Science Journal
We 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, Geronimo L. Villanueva, Vincent Kofman, Thomas J. Fauchez, Sara Faggi, Avi M. Mandell, Aki Roberge, Eleonora Alei   +7 more
doaj   +1 more source

New Measures of STEREO CME Masses and Directions

The Astrophysical Journal
Coronal 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
doaj   +1 more source

Noninvasive molecular imaging of neuroinflammation [PDF]

, 2011
Inflammation is a highly dynamic and complex adaptive process to preserve and restore tissue homeostasis. Originally viewed as an immune-privileged organ, the central nervous system (CNS) is now recognized to have a constant interplay with the innate and
Jacobs, A.H. (Andreas), Bertrand Tavitian, Windhorst, A.D., Lammertsma, A.A., Andreas H Jacobs, Jacobs, A.H., Jacobs, Andreas H., Tavitian, B. (Bertrand), INMiND consortium, Tavitian, Bertrand, Boutin, Herve; id_orcid, Planas, Anna M., Tavitian, B., et al., HENEKA, Michael, Jacobs, Andreas H   +15 more
core   +1 more source

Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of α Centauri A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis

The Astrophysical Journal Letters
The James Webb Space Telescope (JWST) observed our closest solar twin, α Centauri A ( α Cen A), with the Mid-Infrared Instrument in the F1550C (15.5 μ m) coronagraphic imaging mode at three distinct epochs between 2024 August and 2025 April.
Aniket Sanghi, Charles Beichman, Dimitri Mawet, William O. Balmer, Nicolas Godoy, Laurent Pueyo, Anthony Boccaletti, Max Sommer, Alexis Bidot, Elodie Choquet, Pierre Kervella, Pierre-Olivier Lagage, Jarron Leisenring, Jorge Llop-Sayson, Michael Ressler, Kevin Wagner, Mark Wyatt   +16 more
doaj   +1 more source

Designing and testing the coronagraphic Modal Wavefront Sensor: A fast non-common path error sensor for high-contrast imaging [PDF]

, 2018
Non-Common Path Errors (NCPEs) are the dominant factor limiting the performance of current astronomical high-contrast imaging instruments. If uncorrected, the resulting quasi-static speckle noise floor limits coronagraph performance to a raw contrast of ...
Pietrow, A, Snik, Frans, Haffert, S Y, Keller, Christoph U, Wilby, M J, Korkiakoski, Visa   +5 more
core   +1 more source

SuNeRF-CME: Physics-informed Neural Radiance Fields for Tomographic Reconstruction of Coronal Mass Ejections

The Astrophysical Journal
Coronagraphic observations enable direct monitoring of coronal mass ejections (CMEs) through scattered light from free electrons, but determining the 3D plasma distribution from 2D imaging data is challenging due to the optically thin plasma and the ...
Robert Jarolim, Martin Sanner, Chia-Man Hung, Emma Stevenson, Hala Lamdouar, Josh Veitch-Michaelis, Ioanna Bouri, Anna Malanushenko, Elena Provornikova, Vít Růžička, Carlos Urbina-Ortega   +10 more
doaj   +1 more source

NICMOS Two Gyro Mode Coronagraphic Performance

, 2005
In preparation for the Hubble Space Telescope (HST) entry into Two Gyro Mode (TGM) operations, the NICMOS coronagraphic performance was assessed during the February 21, 2005 TGM on orbit test (ID: 10448) in two filter bands (F110W and F160W).
G. Schneider, A. B. Schultz, I. Dashevsky, S. Malhotra   +3 more
core  

Calibrating Coronagraphic Spectroscopy on the HST Space Telescope Imaging Spectrograph

Coronagraphic imaging allows us to study faint features around bright objects, and can be combined with long-slit spectroscopy by adding an occulting bar in the slit.
Zhang, Jingyi
core   +1 more source

Resolution and calibration effects in high contrast polarimetric imaging of circumstellar scattering regions

Astronomy & Astrophysics
Context. Many circumstellar dust scattering regions have been detected and investigated with polarimetric imaging. However, the quantitative determination of the intrinsic polarization and of dust properties is difficult because of complex observational ...
Schmid H. M., Ma J.
doaj   +1 more source

Sky Brightness Evaluation at Concordia Station, Dome C, Antarctica, for Ground-Based Observations of the Solar Corona. [PDF]

Sol Phys, 2022
Liberatore A, Capobianco G, Fineschi S, Massone G, Zangrilli L, Susino R, Nicolini G.   +6 more
europepmc   +1 more source