164 citations · 485 across the 6 of their papers we have counts for
9 papers · 1 filter
Fast computation of Lyot-style coronagraph propagation
Remi Soummer, Laurent Pueyo, Anand Sivaramakrishnan +1
We present a new method for numerical propagation through Lyot-style coronagraphs using finite occulting masks. Standard methods for coronagraphic simulations involve Fast Fourier…
Temporal Evolution of Coronagraphic Dynamic Range, and Constraints on Companions to Vega
Sasha Hinkley, Ben R. Oppenheimer, Remi Soummer +8
The major obstacle to the direct detection of companions to nearby stars is the overwhelming brightness of the host star. Current instruments employing the combination of adaptive…
Astrometry and Photometry with Coronagraphs
Anand Sivaramakrishnan, Ben R. Oppenheimer
We propose a solution to the problem of astrometric and photometric calibration of coronagraphic images with a simple optical device which, in theory, is easy to use. Our design us…
Low Order Aberrations in Band-Limited Lyot Coronagraphs
Anand Sivaramakrishnan, Remi Soummer, Allic V. Sivaramakrishnan +3
We study the way Lyot coronagraphs with unapodized entrance pupils respond to small, low order phase aberrations. This study is applicable to ground-based adaptive optics coronagra…
Spiders in Lyot Coronagraphs
Anand Sivaramakrishnan, James P. Lloyd
In principle, suppression of on-axis stellar light by a coronagraph is easier on an unobscured aperture telescope than on one with an obscured aperture. Recent designs such as the…
Lyot Coronagraphy on Giant Segmented-Mirror Telescopes
Anand Sivaramakrishnan, Natalia Yaitskova
We present a study of Lyot style (i.e., classical, band-limited, and Gaussian occulter) coronagraphy on extremely large, highly-segmented telescopes. We show that while increased t…