Accès ouvert
2017
conference-paper
OpenAlex
Peter G. Halverson, A. Kuhnert, J. Logan, M. W. Regehr et autres
The Space Interferometry Mission, scheduled for launch in 2008, is an optical stellar interferometer with a 10 meter baseline capable of micro-arcsecond accuracy astrometry. A mission-enabling technology development program is underway at JPL, including the design and test of heterodyne interferometer metrology …
us
(code pays fourni par la source)
2012
conference-paper
OpenAlex
Christopher B. Mendillo, Brian Hicks, T. Cook, Thomas G. Bifano et autres
The Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE 36.225 UG) was designed to directly image the exozodiacal dust disk of ǫ Eridani (K2V, 3.22 pc) down to an inner radius of 1.5 AU. PICTURE carried four key enabling technologies on …
us
(code pays fourni par la source)
2008
conference-paper
OpenAlex
Shanti Rao, J. Kent Wallace, Rocco Samuele, S. Chakrabarti et autres
We report progress on a nulling coronagraph intended for direct imaging of extrasolar planets. White light is suppressed in an interferometer, and phase errors are measured by a second interferometer. A 1020-pixel MEMS deformable mirror in the first interferometer adjusts the path …
us
(code pays fourni par la source)
2008
article
OpenAlex
Shanti Rao, J. Kent Wallacea, Rocco Samuele, S. Chakrabarti et autres
We report progress on a nulling coronagraph intended for direct imaging of extrasolar planets. White light is suppressed in an interferometer, and phase errors are measured by a second interferometer. A 1020-pixel MEMS deformable mirror in the first interferometer adjusts the path …
us
(code pays fourni par la source)
2008
article
OpenAlex
Shanti Rao, J. Kent Wallace, Mike Shao, Edouard Schmidtlin et autres
This slide presentation reviews a method for planet finding using microelectromechanical systems (MEMS) Adaptive Optics (AO). The use of a deformable mirror (DM) is described as a part of the instrument that was designed with a nulling interferometer. The strategy that is …
2007
conference-paper
OpenAlex
Rocco Samuele, J. Kent Wallace, Edouard Schmidtlin, Michael Shao et autres
The crux of visible exoplanet detection is overcoming significant star-planet contrast ratios on the order of 10-7to 10-10- at very small angular separations. We are developing a nulling interferometer coronagraph designed to achieve a 10-6contrast ratio at a working science bandpass of …
us, gb
(code pays fourni par la source)
2006
conference-paper
OpenAlex
B. M. Levine, F. Aguayo, Santos Fregoso, Joseph J. Green et autres
We describe the advantages of a nulling coronagraph instrument behind a single aperture space telescope for detection and spectroscopy of Earth-like extrasolar planets in visible light. Our concept synthesizes a nulling interferometer by shearing the telescope pupil into multiple beams. They are …
us
(code pays fourni par la source)
2006
conference-paper
OpenAlex
Michael Shao, B. M. Levine, J. Kent Wallace, Glenn S. Orton et autres
The nulling coronagraph is one of 5 instrument concepts selected by NASA for study for potential use in the TPF-C mission. This concept for extreme starlight suppression has two major components, a nulling interferometer to suppress the starlight to ~10-10 per airy …
us
(code pays fourni par la source)
2006
conference-paper
OpenAlex
J. Kent Wallace, Randall Bartos, Shanti Rao, Rocco Samuele et autres
Direct detection of exo-planets from the ground will become a reality with the advent of a new class of extreme-adaptive optics instruments that will come on-line within the next few years. In particular, the Gemini Observatory will be developing the Gemini Planet …
us
(code pays fourni par la source)
Accès ouvert
2005
article
OpenAlex
Michael Shao, Joseph J. Green, Benjamin F. Lane, J. Kent Wallace et autres
Ground and space based coronagraphs have been proposed to suppress the light of the star so a planet nearby can be imaged. But even when starlight has been suppressed by . This paper describes a speckle calibration approach that measures the electric …
us
(code pays fourni par la source)
Accès ouvert
2005
article
OpenAlex
Edouard Schmidtlin, J. Kent Wallace, Rocco Samuele, B. M. Levine et autres
In order to detect directly faint planets around other stars it is important to develop techniques to cancel the central starlight. We report progress in terms of null depth on the visible nulling experiments at JPL, essential for NASAs future space missions …
us
(code pays fourni par la source)
2004
conference-abstract
OpenAlex
M. Shao, B. M. Levine, J. Kent Wallace, Dayang LIU et autres