21 citations · 43 across the 17 of their papers we have counts for
18 papers
Modal estimation of high-order wavefront drifts on coronagraphic testbeds for high-contrast direct imaging of exoplanets
Saikrishna Manojkumar, Susan F. Redmond, Leonid Pogorelyuk +13
Long-term wavefront stability will be critical for the upcoming Habitable Worlds Observatory which aims to directly image exo-Earths. Mechanical and thermal instabilities induce sl…
Segment-level thermal sensitivity analysis for exo-Earth coronagraphy with segmented space telescopes
Ananya Sahoo, Laurent Pueyo, Iva Laginja +5
Direct imaging and characterization of Earth-like planets require ultra-stable wavefronts to achieve a starlight suppression level of 100 parts per trillion (ppt) in the coronagrap…
Exploring Exoplanets with Interferometry
Sascha P. Quanz, Bertrand Mennesson, Charles Beichman +27
(Extract from the Executive Summary) Humanity stands at the threshold of answering one of its most profound questions: Does life exist beyond Earth? Ongoing and upcoming space miss…
Leveraging Photometry for Deconfusion of Directly Imaged Multi-Planet Systems
Samantha N. Hasler, Leonid Pogorelyuk, Riley Fitzgerald +2
Future missions, including the Habitable Worlds Observatory, will aim to image Earth-like exoplanets around Sun-like stars in reflected light. Determining whether an exoplanet is i…
A parameter scan of dark zone maintenance for high-contrast imaging of exoplanets using theoretical and experimental implementations
Saikrishna Manojkumar, Christine L. Page, Leonid Pogorelyuk +14
Maintaining wavefront stability while directly imaging exoplanets over long exposure times is an ongoing problem in the field of high-contrast imaging. Robust and efficient high-or…
STARI: STarlight Acquisition and Reflection toward Interferometry
John D. Monnier, Prachet Jain, Shashank Kalluri +7
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…
Optical modeling for the evaluation of HOWFSC on embedded processors
Kian Milani, Ewan Douglas, Leonid Pogorelyuk +5
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.…
Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities
Bertrand Mennesson, Ruslan Belikov, Emiel Por +34
We summarize the current best polychromatic (10 to 20 % bandwidth) contrast performance demonstrated in the laboratory by different starlight suppression approaches and systems des…
Coronagraphic Data Post-processing Using Projections on Instrumental Modes
Yinzi Xin, Laurent Pueyo, Romain Laugier +4
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 contr…
Design of the vacuum high contrast imaging testbed for CDEEP, the Coronagraphic Debris and Exoplanet Exploring Pioneer
Erin R. Maier, Ewan S. Douglas, Daewook Kim +26
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…
Dark zone maintenance results for segmented aperture wavefront error drift in a high contrast space coronagraph
Susan F. Redmond, Laurent Pueyo, Leonid Pogorelyuk +8
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,…
Implementation of a broadband focal plane estimator for high-contrast dark zones
Susan F. Redmond, Laurent Pueyo, Leonid Pogorelyuk +6
The characterization of exoplanet atmospheres using direct imaging spectroscopy requires high-contrast over a wide wavelength range. We study a recently proposed focal plane wavefr…
Information-theoretical Limits of Recursive Estimation and Closed-loop Control in High-contrast Imaging
Leonid Pogorelyuk, Laurent Pueyo, Jared R. Males +2
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). Ana…
A review of simulation and performance modeling for the Roman coronagraph instrument
Ewan S. Douglas, Jaren N. Ashcraft, Ruslan Belikov +10
The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) will be capable of characterizing exoplanets in reflected light and will demonstrate space technologies essential…
On the Effects of Pointing Jitter, Actuators Drift, Telescope Rolls and Broadband Detectors in Dark Hole Maintenance and Electric Field Order Reduction
Leonid Pogorelyuk, Laurent Pueyo, N. Jeremy Kasdin
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 wav…
An Efficient Approximation of the Kalman Filter for Multiple Systems Coupled via Low-Dimensional Stochastic Input
Leonid Pogorelyuk, Clarence W. Rowley, N. Jeremy Kasdin
We formulate a recursive estimation problem for multiple dynamical systems coupled through a low dimensional stochastic input, and we propose an efficient sub-optimal solution. The…
Reduced Order Estimation of the Speckle Electric Field History for Space-Based Coronagraphs
Leonid Pogorelyuk, N. Jeremy Kasdin, Clarence W. Rowley
In high-contrast space-based coronagraphs, one of the main limiting factors for imaging the dimmest exoplanets is the time varying nature of the residual starlight (speckles). Mode…
Dark Hole Maintenance and A Posteriori Intensity Estimation in the Presence of Speckle Drift in a High-Contrast Space Coronagraph
Leonid Pogorelyuk, N. Jeremy Kasdin
Direct exoplanet imaging via coronagraphy requires maintenance of high contrast in a dark hole for lengthy integration periods. Wavefront errors that change slowly over that time a…