Results 31 to 40 of about 1,731,322 (198)

A Wolf 359 in Sheep's Clothing: Hunting for Substellar Companions in the Fifth-closest System Using Combined High-contrast Imaging and Radial Velocity Analysis

The Astronomical Journal, 2023
Wolf 359 (CN Leo, GJ 406, Gaia DR3 3864972938605115520) is a low-mass star in the fifth-closest neighboring system (2.41 pc). Because of its relative youth and proximity, Wolf 359 offers a unique opportunity to study substellar companions around M stars ...
Rachel Bowens-Rubin, Joseph M. Akana Murphy, Philip M. Hinz, Mary Anne Limbach, Andreas Seifahrt, Rocio Kiman, Maïssa Salama, Sagnick Mukherjee, Madison Brady, Aarynn L. Carter, Rebecca Jensen-Clem, Maaike A. M. van Kooten, Howard Isaacson, Molly Kosiarek, Jacob L. Bean, David Kasper, Rafael Luque, Gudmundur Stefánsson, Julian Stürmer   +18 more
doaj   +1 more source

JWST/NIRCam Coronagraphy of the Young Planet-hosting Debris Disk AU Microscopii

The Astronomical Journal, 2023
High-contrast imaging of debris disk systems permits us to assess the composition and size distribution of circumstellar dust, to probe recent dynamical histories, and to directly detect and characterize embedded exoplanets. Observations of these systems
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Marie Ygouf, Anthony Boccaletti, Thomas P. Greene, John Krist, Peter Plavchan, Marcia J. Rieke, Thomas L. Roellig, John Stansberry, John P. Wisniewski, Erick T. Young   +22 more
doaj   +1 more source

High contrast imaging with the JWST NIRCAM coronagraph [PDF]

SPIE Proceedings, 2005
Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5pm wavelength range where brown dwarfs and hot Jupiters are thought to have significant brightness enhancements. To facilitate high contrast imaging within this band, the Near-Infrared Camera (NIRCAM) will employ a Lyot ...
Green, Joseph J., Beichman, Charles, Basinger, Scott A., Horner, Scott, Meyer, Michael, Redding, David C., Rieke, Marcia, Trauger, John T.   +7 more
openaire   +2 more sources

Sequential coronagraphic low-order wavefront control [PDF]

, 2023
Coronagraphs are highly sensitive to wavefront errors, with performance degrading rapidly in the presence of low-order aberrations. Correcting these aberrations at the coronagraphic focal plane is key to optimal performance.
Walker, Samuel A. U., Cunnyngham, Ian, Guthery, Charlotte, Delorme, Jacques-Robert, Bottom, Michael   +4 more
core   +1 more source

XAO coronagraphy with the High-Order Test bench

EPJ Web of Conferences, 2011
Extreme adaptive optics systems dedicated to the search for extra solar planets are currently being developed for 8–10 meter class telescopes. The High-Order Test bench (HOT) is a high-contrast imaging adaptive optics bench developed at ESO.
Kasper M., Aller Carpentier E., Martinez P.   +2 more
doaj   +1 more source

Coronagraphic Imaging of 3C 273 with the Advanced Camera for Surveys

The Astronomical Journal, 2003
The nearby and luminous QSO 3C 273 was imaged in 2002 July with the High Resolution Channel (HRC) of the Advanced Camera for Surveys (ACS) in coronagraphic mode in F475W (g), F606W (V), and F814W (I) as part of the Early Release Observations (ERO) program.
Martel AR, Ford HC, Tran HD, Illingworth GD, Krist JE, White RL, Sparks WB, Gronwall C, Cross NJG, Hartig GF, Clampin M, Ardila DR, Bartko F, Benitez N, Blakeslee JP, Bouwens RJ, Broadhurst TJ, Brown RA, Burrows CJ, Cheng ES, Feldman PD, Franx M, Golimowski DA, Infante L, Kimble RA, Lesser MP, McCann WJ, Menanteau F, Meurer GR, Miley GK, Postman M, ROSATI, Piero, Sirianni M, Tsvetanov ZI, Zheng W.   +34 more
openaire   +3 more sources

On Some Properties of SEP Effective CMEs

International Scholarly Research Notices, Volume 2011, Issue 1, 2011., 2011
Solar energetic particles (SEP) are believed to originate from two different sources, solar flares and coronal mass ejections (CMEs). The large SEP events constitute a serious radiation hazard. The high‐energy solar proton data obtained from NOAA Space Environment Services Center are used to investigate some statistical properties such as speed ...
Nishant Mittal, Anshu Gupta, P. S. Negi, Udit Narain, M. Richmond   +4 more
wiley   +1 more source

Post-coronagraphic PSF sharpening with the vortex coronagraph [PDF]

, 2017
Small-angle coronagraphs are key components for future instruments being developed for the ELTs. Because they deliver high contrast capabilities at small angular separations from the host star, they enable us to address by direct imaging one of the most ...
Gilles Orban de Xivry, Orban De Xivry, Gilles, Huby, Elsa, Jolivet, Aïssa, Aïssa Jolivet, Olivier Absil, Elsa Huby, Absil, Olivier   +7 more
core   +2 more sources

Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Dynamical Evidence of a Spiral-Arm-Driving and Gap-Opening Protoplanet from SAO 206462 Spiral Motion

Universe
In the early stages of planetary system formation, young exoplanets gravitationally interact with their surrounding environments and leave observable signatures on protoplanetary disks.
Chen Xie, Chengyan Xie, Bin B. Ren, Myriam Benisty, Christian Ginski, Taotao Fang, Simon Casassus, Jaehan Bae, Stefano Facchini, François Ménard, Rob G. van Holstein   +10 more
doaj   +1 more source

Video-rate or high-precision: A flexible range imaging camera [PDF]

, 2008
A range imaging camera produces an output similar to a digital photograph, but every pixel in the image contains distance information as well as intensity.
Dorrington, Adrian A., Payne, Andrew D., Conroy, Richard M., Andrew D. Payne, Jongenelen, Adrian P.P., Adrian A. Dorrington, Adrian P. P. Jongenelen, Carnegie, Dale A., Michael J. Cree, John P. Godbaz, Godbaz, John Peter, Dale A. Carnegie, Richard M. Conroy, Cree, Michael J.   +13 more
core   +1 more source