Zobrazeno 1 - 10
of 11 435
pro vyhledávání: '"Van, Kooten"'
Autor:
Fowler, J., Jensen-Clem, Rebecca, van Kooten, Maaike A. M., Chambouleyron, Vincent, Cetre, Sylvain
The direct imaging and characterization of exoplanets requires extreme adaptive optics (XAO), achieving exquisite wavefront correction (upwards of 90$\%$ Strehl) over a narrow field of view (a few arcseconds). For these XAO systems the temporal error
Externí odkaz:
http://arxiv.org/abs/2407.11187
The nucleosynthetic fingerprint of the outermost protoplanetary disk and early Solar System dynamics
Autor:
van Kooten, Elishevah, Zhao, Xuchao, Franchi, Ian, Tung, Po-Yen, Fairclough, Simon, Walmsley, John, Onyett, Isaac, Schiller, Martin, Bizzarro, Martin
Publikováno v:
Science Advances, 2024
Knowledge of the nucleosynthetic isotope composition of the outermost protoplanetary disk is critical to understand the formation and early dynamical evolution of the Solar System. We report the discovery of outer disk material preserved in a pristin
Externí odkaz:
http://arxiv.org/abs/2406.09893
Autor:
Salama, Maissa, Guthery, Charlotte, Chambouleyron, Vincent, Jensen-Clem, Rebecca, Wallace, J. Kent, Delorme, Jacques-Robert, Troy, Mitchell, Wenger, Tobias, Echeverri, Daniel, Finnerty, Luke, Jovanovic, Nemanja, Liberman, Joshua, Lopez, Ronald A., Mawet, Dimitri, Morris, Evan C., van Kooten, Maaike, Wang, Jason J., Wizinowich, Peter, Xin, Yinzi, Xuan, Jerry
We present the first on-sky segmented primary mirror closed-loop piston control using a Zernike wavefront sensor (ZWFS) installed on the Keck II telescope. Segment co-phasing errors are a primary contributor to contrast limits on Keck and will be nec
Externí odkaz:
http://arxiv.org/abs/2404.08728
Autor:
Seaton, Daniel B., Caspi, Amir, Alzate, Nathalia, Davis, Sarah J., DeForest, Alec R., DeForest, Craig E., Erickson, Nicholas F., Kovac, Sarah A., Patel, Ritesh, Osterman, Steven N., Tosolini, Anna, Van Kooten, Samuel J., West, Matthew J.
Publikováno v:
Solar Physics, Vol. 299, 79 (20pp); 2024 June 10
We present results of a dual eclipse expedition to observe the solar corona from two sites during the annular solar eclipse of 2023 October 14, using a novel coronagraph designed to be accessible for amateurs and students to build and deploy. The cor
Externí odkaz:
http://arxiv.org/abs/2404.02097
Publikováno v:
A&A 685, A114 (2024)
During protoplanetary disk formation, dust grains located in the outer disk retain their pristine icy composition, while solids in the inner stellar-heated disk undergo volatile loss. This process may have left a fossil record in Solar System materia
Externí odkaz:
http://arxiv.org/abs/2402.08141
Magnetic bright points on the solar photosphere mark the footpoints of kilogauss magnetic flux tubes extending toward the corona. Convective buffeting of these tubes is believed to excite magnetohydrodynamic waves, which can propagate to the corona a
Externí odkaz:
http://arxiv.org/abs/2402.10915
Publikováno v:
Proceedings of the SPIE, Volume 12680, id. 126801V (2023)
Optimal atmospheric conditions are beneficial for detecting exoplanets via high contrast imaging (HCI), as speckles from adaptive optics' (AO's) residuals can make it difficult to identify exoplanets. While AO systems greatly improve our image qualit
Externí odkaz:
http://arxiv.org/abs/2310.08713
For future extremely large telescopes, error in extreme adaptive optics systems at small angular separations will be highly impacted by the lag time of the correction, which is typically on millisecond timescales; one solution is to apply a predictiv
Externí odkaz:
http://arxiv.org/abs/2310.02514
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:
Desai, Niyati, König, Lorenzo, Por, Emiel, Juanola-Parramon, Roser, Belikov, Ruslan, Laginja, Iva, Guyon, Olivier, Pueyo, Laurent, Fogarty, Kevin, Absil, Olivier, Altinier, Lisa, Baudoz, Pierre, Bidot, Alexis, Bonse, Markus Johannes, Bott, Kimberly, Brandl, Bernhard, Carlotti, Alexis, Casewell, Sarah L., Choquet, Elodie, Cowan, Nicolas B., Doelman, David, Fowler, J., Gebhard, Timothy D., Gutierrez, Yann, Haffert, Sebastiaan Y., Herscovici-Schiller, Olivier, Hours, Adrien, Kenworthy, Matthew, Kleisioti, Elina, Krasteva, Mariya, Landman, Rico, Leboulleux, Lucie, Mazoyer, Johan, Millar-Blanchaer, Maxwell A., Mouillet, David, NDiaye, Mamadou, Snik, Frans, van Dam, Dirk, van Gorkom, Kyle, van Kooten, Maaike, Vaughan, Sophia R.
The detection and characterization of Earth-like exoplanets around Sun-like stars is a primary science motivation for the Habitable Worlds Observatory. However, the current best technology is not yet advanced enough to reach the 10^-10 contrasts at c
Externí odkaz:
http://arxiv.org/abs/2309.04925