Results 51 to 60 of about 1,832,653 (172)

The Apparent Absence of Forward Scattering in the HD 53143 Debris Disk

The Astrophysical Journal, 2023
HD 53143 is a mature Sun-like star and host to a broad disk of dusty debris, including a cold outer ring of planetesimals near 90 au. Unlike most other inclined debris disks imaged at visible wavelengths, the cold disk around HD 53143 appears as ...
Christopher C. Stark, Bin Ren, Meredith A. MacGregor, Ward S. Howard, Spencer A. Hurt, Alycia J. Weinberger, Glenn Schneider, Elodie Choquet   +7 more
doaj   +1 more source

The subaru coronagraphic extreme AO (SCExAO) system: Wavefront control and detection of exoplanets with coherent light modulation in the focal plane [PDF]

, 2020
The Subaru Coronagraphic Extreme-AO (SCExAO) system is designed for high contrast coronagraphic imaging at small angular separations, and is scheduled to see first light on the Subam Telescope in early 2011.
Martinache, Frantz, Garrel, Vincent, Guyon, Olivier, Yoshikawa, Takashi, Vogt, Frédéric P.A., Yokochi, Kaito   +5 more
core   +1 more source

Variability in the Propagation Characteristics of Small Transients in the Near-Sun Solar Wind Identified by the CORAR Technique

The Astrophysical Journal
Using the Correlation-Aided Reconstruction (CORAR) technique, we identified a population of small transient structures in the near-Sun solar wind observed by the white-light coronagraphs on board STEREO between 2009 December and 2010 September.
Shaoyu Lyu, Fang Shen, Yuming Wang, Hongqiang Song   +3 more
doaj   +1 more source

Shaped Pupil coronagraphic masks test and AIV report

, 2020
! The document focuses on the testing and alignment processes of Shaped Pupil coronagraphic masks for the SHARK-NIR instrument, emphasizing precision and efficiency in enhancing exoplanet imaging and circumstellar disk studies.
E. Carolo, G. Umbriaco, D. Vassallo
core  

The VORTEX coronagraphic test bench [PDF]

, 2014
In this paper, we present the infrared coronagraphic test bench of the University of Liège named VODCA (Vortex Optical Demonstrator for Coronagraphic Applications).
Jolivet, Aïssa, Huby, Elsa, Surdej, Jean, A. Jolivet, Habraken, Serge, Delacroix, Christian, P. Piron, S. Habraken, D. Mawet, E. Huby, O. Absil, Absil, Olivier, J. Surdej, Piron, Pierre, Mawet, Dimitri, C. Delacroix   +15 more
core   +1 more source

Coronagraphic Data Post-processing Using Projections on Instrumental Modes

The Astrophysical Journal
Directly observing exoplanets with coronagraphs is impeded by the presence of speckles from aberrations in the optical path, which can be mitigated in hardware with wave front control, as well as in post-processing. This work explores using an instrument
Yinzi Xin, Laurent Pueyo, Romain Laugier, Leonid Pogorelyuk, Ewan S. Douglas, Benjamin J. S. Pope, Kerri L. Cahoy   +6 more
doaj   +1 more source

Coronagraphic Imaging with HST and STIS

, 2002
Revealing faint circumstellar nebulosity and faint stellar or substellar companions to bright stars typically requires use of techniques for rejecting the direct, scattered, and diffracted light of the star. One such technique is Lyot coronagraphy.
Heap, S. R., Plait, P., Lindler, D., Malumuth, E., Woodgate, B. E., Bowers, C. W., Kimble, R. A., Proffitt, C., Gull, T. R., Grady, C. A.   +9 more
core  

A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph

The Astronomical Journal
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks in the millimeter continuum have shown a variety of radial gaps, cavities, and spiral features.
Nicole L. Wallack, Jean-Baptiste Ruffio, Garreth Ruane, Bin B. Ren, Jerry W. Xuan, Marion Villenave, Dimitri Mawet, Karl Stapelfeldt, Jason J. Wang, Michael C. Liu, Olivier Absil, Carlos Alvarez, Jaehan Bae, Charlotte Bond, Michael Bottom, Benjamin Calvin, Élodie Choquet, Valentin Christiaens, Therese Cook, Bruno Femenía Castellá, Carlos Gomez Gonzalez, Greta Guidi, Elsa Huby, Joel Kastner, Heather A. Knutson, Tiffany Meshkat, Henry Ngo, Sam Ragland, Maddalena Reggiani, Luca Ricci, Eugene Serabyn, Taichi Uyama, Jonathan P. Williams, Peter Wizinowich, Zoe Zawol, Shangjia Zhang, Zhaohuan Zhu   +36 more
doaj   +1 more source

Direct Measurement of Extinction in a Planet-hosting Gap

The Astronomical Journal
Recent disk observations have revealed multiple indirect signatures of forming gas giant planets, but high-contrast imaging has rarely confirmed the presence of the suspected perturbers.
Gabriele Cugno, Stefano Facchini, Felipe Alarcon, Jaehan Bae, Myriam Benisty, Anna-Christina Eilers, Gene C. K. Leung, Michael Meyer, Laurent Pueyo, Richard Teague, Edwin Bergin, Julien Girard, Ravit Helled, Jane Huang, Jarron Leisenring   +14 more
doaj   +1 more source

The James Webb Space Telescope Absolute Flux Calibration. VI. Near-infrared Camera Imaging and Coronagraphy

The Astronomical Journal
We present an updated flux calibration for all imaging modes of the Near Infrared Camera (NIRCam) on JWST that converts instrumental units to physical surface brightness units of MJy sr ^−1 .
Martha L. Boyer, Benjamin Sunnquist, Bryan Hilbert, Dan Coe, Varun Bajaj, Paul Bennet, Julien H. Girard   +6 more
doaj   +1 more source