Results 51 to 60 of about 3,877 (212)

SCExAO/CHARIS Multiwavelength High-contrast Imaging of the BD+45°598 Debris Disk

The Astronomical Journal
We present a multiwavelength (1.16–2.37 μ m) view of the debris disk around BD+45 ^° 598, using the Subaru Coronagraphic Extreme Adaptive Optics system paired with the Coronagraphic High Angular Resolution Imaging Spectrograph.
Maria Vincent, Kellen Lawson, Thayne Currie, Jonathan P. Williams, Olivier Guyon, Julien Lozi, Vincent Deo, Sébastien Vievard   +7 more
doaj   +1 more source

Deep imaging survey of young, nearby austral stars: VLT/NACO near-infrared Lyot-coronographic observations [PDF]

, 2010
Context. High contrast and high angular resolution imaging is the optimal search technique for substellar companions to nearby stars at physical separations larger than typically 10 AU.
Bessell, M. S., Beuzit, J.-L., Bonavita, M., Bonnefoy, M., Chauvin, G., Desidera, S., Dumas, C., Farihi, J., Lagrange, A.-M., Lowrance, P., Mouillet, D., Song, I., Zuckerman, B.   +12 more
core   +1 more source

SPICA infrared coronagraph for the direct observation of exo-planets

, 2010
We present a MIR coronagraph to target the direct observation of extrasolar planets for SPICA, in which a coronagraph is currently regarded as an option of the focal plane instruments. The primary target of the SPICA coronagraph is the direct observation
Abe, Abe, Aime, Aime, Beichman, Bifano, Borucki, Burrows, Burrows, Cash, Charbonneau, Charbonneau, Deming, Deming, Dyson, Désert, Enya, Enya, Enya, Enya, Enya, Enya, Enya, Green, Guyon, Guyon, Harrington, Haze, Henry, Hodapp, Horner, Kalas, Kaneda, Kaneda, Kasdin, Kasdin, Keigo Enya, Kenyon, Lyot, Marois, Mayor, Mulvihill, Murakami, Murakami, Nakagawa, Nakagawa, Onaka, Onaka, Pluzhnik, Richardson, Soummer, Stewart, Sugita, Swain, Swain, Tamura, Tanaka, Tanaka, Tinetti, Toomey, Traub, Traub, Trauger, Vanderbei, Vanderbei, Vanderbei, Werner   +66 more
core   +1 more source

Jovian Sodium Nebula and Io Plasma Torus S+ and Brightnesses 2017–2023: Insights Into Volcanic Versus Sublimation Supply

Journal of Geophysical Research: Space Physics, Volume 129, Issue 3, March 2024.
Abstract We present first results derived from the largest collection of contemporaneously recorded Jovian sodium nebula and Io plasma torus in [S II] 6731 Å images assembled to date. The data were recorded by the Planetary Science Institute's Io Input/Output observatory and provide important context to Io geologic and atmospheric studies as well as ...
Jeffrey P. Morgenthaler, Carl A. Schmidt, Marissa F. Vogt, Nicholas M. Schneider, Max Marconi   +4 more
wiley   +1 more source

Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star HIP 39017

The Astronomical Journal
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, γ Doradus ( γ Dor)-type variable star HIP 39017 (HD 65526). The companion’s SCExAO/CHARIS JHK (1.1–2.4 μ m) spectrum and Keck/NIRC2
Taylor L. Tobin, Thayne Currie, Yiting Li, Jeffrey Chilcote, Timothy D. Brandt, Brianna Lacy, Masayuki Kuzuhara, Maria Vincent, Mona El Morsy, Vincent Deo, Jonathan P. Williams, Olivier Guyon, Julien Lozi, Sebastien Vievard, Nour Skaf, Kyohoon Ahn, Tyler Groff, N. Jeremy Kasdin, Taichi Uyama, Motohide Tamura, Aidan Gibbs, Briley L. Lewis, Rachel Bowens-Rubin, Maïssa Salama, Qier An, Minghan Chen   +25 more
doaj   +1 more source

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

Collection, Collation, and Comparison of 3D Coronal CME Reconstructions

Space Weather, Volume 22, Issue 1, January 2024.
Abstract Predicting the impacts of coronal mass ejections (CMEs) is a major focus of current space weather forecasting efforts. Typically, CME properties are reconstructed from stereoscopic coronal images and then used to forward model a CME's interplanetary evolution.
C. Kay, E. Palmerio
wiley   +1 more source

SCExAO as a precursor to an ELT exoplanet direct imaging instrument [PDF]

, 2013
The Subaru Coronagraphic Extreme AO (SCExAO) instrument consists of a high performance Phase Induced Amplitude Apodisation (PIAA) coronagraph combined with an extreme Adaptive Optics (AO) system operating in the near-infrared (H band).
Clergeon, Christophe, Fini, Luca, Garrel, Vincent, Guyon, Olivier, Huby, Elsa, Jovanovic, Nemanja, Kudo, Tomoyuki, Lacour, Sylvestre, Martinache, Frantz, Norris, Barnaby, Perrin, Guy, Singh, Garima, Stewart, Paul, Tuthill, Peter, Vievard, Sebastien   +14 more
core   +1 more source

Simultaneous Exoplanet Characterization and deep wide-field imaging with a diffractive pupil telescope

, 2013
High-precision astrometry can identify exoplanets and measure their orbits and masses, while coronagraphic imaging enables detailed characterization of their physical properties and atmospheric compositions through spectroscopy.
Ammons, Stephen M., Angel, Roger, Belikov, Ruslan, Bendek, Eduardo A., Eisner, Josh A., Guyon, Olivier, Levine, Marie, Martinache, Frantz, Milster, Thomas D., Nemati, Bijan, Pitman, Joe, Shaklan, Stuart, Shao, Michael, Woodruff, Robert A., Woolf, Neville J.   +14 more
core   +2 more sources

A Distance-Limited Imaging Survey of Sub-Stellar Companions to Solar Neighborhood Stars [PDF]

, 2008
We report techniques and results of a Palomar 200-inch (5 m) adaptive optics imaging survey of sub-stellar companions to solar-type stars. The survey consists of Ks coronagraphic observations of 21 FGK dwarfs out to 20 pc (median distance about 17 pc ...
Alexander L. Rudolph, Beuzit, Biller, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Carson, Carson, Cuby, Epchtein, Geballe ., Gelino, Gliese, Gregorio G. Villar, Gunn, Hinkley, Joseph C. Carson, Karl R. Stapelfeldt, Kyle D. Hiner, Lafrenière, Leggett, Leggett, Levine, Lowrance, Macintosh, Mamajek, Metchev & Hillenbrand, Michael G. Blaschak, Nielsen, Perryman, Potter, Skrutskie, Strauss, Tamura, Tsvetanov, Zapatero Osorio   +37 more
core   +1 more source