Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Pogorelyuk, Leonid"'
Autor:
Monnier, John D., Jain, Prachet, Kalluri, Shashank, Cutler, James, D'Amico, Simone, Lightsey, Glenn, Pogorelyuk, Leonid, Vasisht, Gautam, Cahoy, Kerri, Meyer, Michael
We present the concept for STARI: STarlight Acquisition and Reflection toward Interferometry. If launched, STARI will be the first mission to control a 3-D CubeSat formation to the few mm-level, reflect starlight over 10s to 100s of meters from one s
Externí odkaz:
http://arxiv.org/abs/2408.03925
Autor:
Milani, Kian, Douglas, Ewan, Pogorelyuk, Leonid, Mendillo, Christopher, Cahoy, Kerri, Belsten, Nicholas, Eickert, Brandon, Rao, Shanti
The correction of quasi-static wavefront errors within a coronagraphic optical system will be a key challenge to overcome in order to directly image exoplanets in reflected light. These quasi-static errors are caused by mid to high-order surface erro
Externí odkaz:
http://arxiv.org/abs/2406.18660
Autor:
Mennesson, Bertrand, Belikov, Ruslan, Por, Emiel, Serabyn, Eugene, Ruane, Garreth, Riggs, A. J. Eldorado, Sirbu, Dan, Pueyo, Laurent, Soummer, Remi, Kasdin, Jeremy, Shaklan, Stuart, Seo, Byoung-Joon, Stark, Christopher, Cady, Eric, Chen, Pin, Crill, Brendan, Fogarty, Kevin, Greenbaum, Alexandra, Guyon, Olivier, Juanola-Parramon, Roser, Kern, Brian, Krist, John, Macintosh, Bruce, Marx, David, Mawet, Dimitri, Prada, Camilo Mejia, Morgan, Rhonda, Nemati, Bijan, Pogorelyuk, Leonid, Redmond, Susan, Seager, Sara, Siegler, Nicholas, Stapelfeldt, Karl, Steiger, Sarah, Trauger, John, Ygouf, a James K. Wallace Marie, Zimmerman, Neil
We summarize the current best polychromatic (10 to 20 % bandwidth) contrast performance demonstrated in the laboratory by different starlight suppression approaches and systems designed to directly characterize exoplanets around nearby stars. We pres
Externí odkaz:
http://arxiv.org/abs/2404.18036
Autor:
Xin, Yinzi, Pueyo, Laurent, Laugier, Romain, Pogorelyuk, Leonid, Douglas, Ewan S., Pope, Benjamin J. S., Cahoy, Kerri L.
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 wavefront control as well as in post-processing. This work explores using an instrume
Externí odkaz:
http://arxiv.org/abs/2401.04269
Autor:
Maier, Erin R., Douglas, Ewan S., Kim, Daewook, Su, Kate, Ashcraft, Jaren N., Breckinridge, James B., Chakrabarti, Supriya, Choi, Heejoo, Choquet, Elodie, Connors, Thomas E., Durney, Olivier, Debes, John, Gonzales, Kerry L., Guthery, Charlotte E., Haughwout, Christian A., Heath, James C., Hyatt, Justin, Lumbres, Jennifer, Males, Jared R., Matthews, Elisabeth C., Milani, Kian, Montoya, Oscar M., N'Diaye, Mamadou, Noenickx, Jamison, Pogorelyuk, Leonid, Ruane, Garreth, Schneider, Glenn, Smith, George A., Stark, Christopher C.
The Coronagraphic Debris Exoplanet Exploring Payload (CDEEP) is a Small-Sat mission concept for high contrast imaging of circumstellar disks. CDEEP is designed to observe disks in scattered light at visible wavelengths at a raw contrast level of 10^-
Externí odkaz:
http://arxiv.org/abs/2109.12718
Autor:
Redmond, Susan F., Pueyo, Laurent, Pogorelyuk, Leonid, Por, Emiel, Noss, James, Brooks, Keira, Laginja, Iva, Will, Scott D., Perrin, Marshall D., Soummer, Remi, Kasdin, N. Jeremy
Due to the limited number of photons, directly imaging planets requires long integration times with a coronagraphic instrument. The wavefront must be stable on the same time scale, which is often difficult in space due to thermal variations and other
Externí odkaz:
http://arxiv.org/abs/2108.08216
Autor:
Redmond, Susan F., Pueyo, Laurent, Pogorelyuk, Leonid, Noss, James, Will, Scott D., Laginja, Iva, Kasdin, N. Jeremy, Perrin, Marshall D., Soummer, Remi
The characterization of exoplanet atmospheres using direct imaging spectroscopy requires high-contrast over a wide wavelength range. We study a recently proposed focal plane wavefront estimation algorithm that exclusively uses broadband images to est
Externí odkaz:
http://arxiv.org/abs/2108.08200
A lower bound on unbiased estimates of wavefront errors (WFE) is presented for the linear regime of small perturbation and active control of a high-contrast region (dark hole). Analytical approximations and algorithms for computing the closed-loop co
Externí odkaz:
http://arxiv.org/abs/2108.03269
Autor:
Douglas, Ewan S., Ashcraft, Jaren N., Belikov, Ruslan, Debes, John, Kasdin, Jeremy, Krist, John, Lacy, Brianna I., Nemati, Bijan, Milani, Kian, Pogorelyuk, Leonid, Riggs, A. J. Eldorado, Savransky, Dmitry, Sirbu, Dan
Publikováno v:
Proc SPIE Volume 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave
The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) will be capable of characterizing exoplanets in reflected light and will demonstrate space technologies essential for future missions to take spectra of Earthlike exoplanets. As the m
Externí odkaz:
http://arxiv.org/abs/2012.12119
Space coronagraphs are projected to detect exoplantes that are at least 1e10 times dimmer than their host stars. Yet, the actual detection threshold depends on the instrument's wavefront stability and varies by an order of magnitude with the choice o
Externí odkaz:
http://arxiv.org/abs/2006.10014