Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Gérard, Benjamin"'
Autor:
Sanchez, Dominic F., Gerard, Benjamin L., Fernandez, Bautista R., Bauman, Brian, Hinz, Philip M.
Focal plane wavefront sensing techniques are generally limited to using imaging systems that have below 1% spectral bandwidths, due to the radial smearing of speckles from chromatic diffraction that causes optical image magnification over larger spec
Externí odkaz:
http://arxiv.org/abs/2407.12666
Autor:
Gerard, Benjamin L., Lemmer, Aaron, Fernandez, Bautista R., Xia, Xiaoxing, Laguna, Cesar, Kim, Mike, Ammons, Stephen Mark, Bauman, Brian, Poyneer, Lisa
Astronomical adaptive optics (AO) is a critical approach to enable ground-based diffraction-limited imaging and high contrast science, with the potential to enable habitable exoplanet imaging on future extremely large telescopes. However, AO systems
Externí odkaz:
http://arxiv.org/abs/2406.10363
Autor:
Sengupta, Aditya R., Diaz, Jordan, Gerard, Benjamin L., Jensen-Clem, Rebecca, Dillon, Daren, DeMartino, Matthew, Bundy, Kevin, Cetre, Sylvain, Chambouleyron, Vincent
Exoplanet direct imaging using adaptive optics (AO) is often limited by non-common path aberrations (NCPAs) and aberrations that are invisible to traditional pupil-plane wavefront sensors (WFSs). This can be remedied by focal-plane (FP) WFSs that cha
Externí odkaz:
http://arxiv.org/abs/2406.07771
Autor:
Chambouleyron, Vincent, Sengupta, Aditya, Salama, Maïssa, van Kooten, Maaike A. M, Gerard, Benjamin L., Haffert, Sebastiaan Y., Cetre, Sylvain, Dillon, Daren, Kupke, Renate, Jensen-Clem, Rebecca, Hinz, Phil, Macintosh, Bruce
Publikováno v:
A&A 681, A48 (2024)
Adaptive optics (AO) is a technique to improve the resolution of ground-based telescopes by correcting, in real-time, optical aberrations due to atmospheric turbulence and the telescope itself. With the rise of Giant Segmented Mirror Telescopes (GSMT
Externí odkaz:
http://arxiv.org/abs/2309.14283
Autor:
Soto, Javier Perez, Laguna, Cesar, Gerard, Benjamin L., Dattilo, Anne, Chambouleyron, Vincent, Jensen-Clem, Rebecca
Due to turbulence in the atmosphere images taken from ground-based telescopes become distorted. With adaptive optics (AO) images can be given greater clarity allowing for better observations with existing telescopes and are essential for ground-based
Externí odkaz:
http://arxiv.org/abs/2308.14855
Exoplanet imaging has thus far enabled studies of wide-orbit ($>$10 AU) giant planet ($>$2 Jupiter masses) formation and giant planet atmospheres, with future 30 meter-class Extremely Large Telescopes (ELTs) needed to image and characterize terrestri
Externí odkaz:
http://arxiv.org/abs/2308.05863
Autor:
Zhang, Stella Yimiao, Duchêne, Gaspard, De Rosa, Robert J., Ansdell, Megan, Konopacky, Quinn, Esposito, Thomas, Chiang, Eugene, Rice, Malena, Matthews, Brenda, Kalas, Paul, Macintosh, Bruce, Marchis, Franck, Metchev, Stan, Patience, Jenny, Rameau, Julien, Ward-Duong, Kimberly, Wolff, Schuyler, Fitzgerald, Michael P., Bailey, Vanessa P., Barman, Travis S., Bulger, Joanna, Chen, Christine H., Chilcotte, Jeffrey K., Cotten, Tara, Doyon, René, Follette, Katherine B., Gerard, Benjamin L., Goodsell, Stephen, Graham, James R., Greenbaum, Alexandra Z., Hibon, Pascale, Hung, Li-Wei, Ingraham, Patrick, Maire, Jérôme, Marley, Mark S., Marois, Christian, Millar-Blanchaer, Maxwell A., Nielsen, Eric L., Oppenheimer, Rebecca, Palmer, David W., Perrin, Marshall D., Poyneer, Lisa A., Pueyo, Laurent, Rajan, Abhijith, Rantakyrö, Fredrik T., Ruffio, Jean-Baptiste, Savransky, Dmitry, Schneider, Adam C., Sivaramakrishnan, Anand, Song, Inseok, Soummer, Remi, Thomas, Sandrine, Wang, Jason J., Wiktorowicz, Sloane J.
The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We present the fir
Externí odkaz:
http://arxiv.org/abs/2302.04893
Focal plane wavefront sensing and control is a critical approach to reducing non-common path errors between the a conventional astronomical adaptive optics (AO) wavefront sensor (WFS) detector and science camera. However, in addition to mitigating no
Externí odkaz:
http://arxiv.org/abs/2301.11282
Autor:
Sengupta, Aditya R., Gerard, Benjamin L., Dillon, Daren, van Kooten, Maaike, Gavel, Donald, Jensen-Clem, Rebecca
We present the results of testing optimal linear-quadratic-Gaussian (LQG) control for tip and tilt Zernike wavefront modes on the SEAL (Santa cruz Extreme AO Lab) testbed. The controller employs a physics model conditioned by the expected tip/tilt po
Externí odkaz:
http://arxiv.org/abs/2209.14424
Autor:
Kupke, Renate, Stelter, R. Deno, Hasan, Amirul, Surya, Arun, Kain, Isabel, Briesemeister, Zackery, Li, Jialin, Hinz, Phil, Skemer, Andrew, Gerard, Benjamin, Dillon, Daren, Ratliff, Christopher
SCALES is a high-contrast, infrared coronagraphic imager and integral field spectrograph (IFS) to be deployed behind the W.M. Keck Observatory adaptive optics system. A reflective optical design allows diffraction-limited imaging over a large wavelen
Externí odkaz:
http://arxiv.org/abs/2208.11736