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We present a new method for numerical propagations through Lyot-style coronagraphs using finite size occulting masks. Standard methods for coronagraphic simulations involve Fast Fourier Transforms (FFT) of very large arrays, and computing power is an issue for the design and tolerancing of coronagraphs on Extremely Large Telescopes (ELT) in order to handle(More)
Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric compositions and luminosities, which are influenced by their formation mechanisms. Using the Gemini Planet Imager, we discovered a planet orbiting the ~20-million-year-old star 51 Eridani at a projected separation of 13 astronomical units. Near-infrared(More)
The Vector Vortex Coronagraph (VVC) is one of the most attractive new-generation coronagraphs for ground-and space-based exoplanet imaging/characterization instruments, as recently demonstrated on sky at Palomar and in the laboratory at JPL, and Hokkaido University. Manufacturing technologies for devices covering wavelength ranges from the optical to the(More)
We present results from the IR component of the HST/WFC3 calibration proposal 12354 in this instrument science report. The proposal was designed to test the high-contrast imaging capability of the HST/WFC3 IR channel to detect faint companions at close angular separation. We observed a bright young star (V=6.9 mag) at nine orients in the F128N narrowband(More)
The Vector Vortex Coronagraph is a phase-based coronagraph, one of the most efficient in terms of inner working angle, throughput, discovery space, contrast, and simplicity. Using liquid-crystal polymer technology, this new coronagraph has recently been the subject of lab demonstrations in the near-infrared, visible and was also used on sky at the Palomar(More)
The local geometry, energy stabilization, and pseudolocal t 1u vibration mode of the Cu + impurity in the alkali halide crystals have been investigated with the ab initio Perturbed Ion (aiPI) cluster-in-the-lattice methodology. The electronic structure of diierent clusters, containing up to 179 ions, has been computed for 9 Cu:AX systems (A: The(More)
SUMMARY The Gemini Planet Imager Exoplanet Survey (GPIES) has observed approximately 17% of the 600 targets in its 890 hour campaign to directly image young, massive exoplanets about nearby stars. We present an update of the pre-survey performance simulations using GPI's on-sky performance data in the form of post-processed, angular separation-dependent(More)
We have spatially resolved five debris disks (HD 30447, HD 35841, HD 141943, HD 191089, and HD 202917) for the first time in near-infrared scattered light by reanalyzing archival Hubble Space Telescope (HST)/NICMOS coronagraphic images obtained between 1999 and 2006. One of these disks (HD 202917) was previously resolved at visible wavelengths using the(More)
Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central(More)
  • Adell, Philippe C Vo, Tuan, Del Castillo, Linda Miyahira, Tetsuo Thornbourn +494 others
  • 2012
powered aqueous extractor for identification of chemical signatures of life on Mars, comets and asteroids. design using heteroclinic and homoclinic connections of unstable resonant orbits. A convenient telescope performance metric for imaging through turbulence. Evaluation of cloudy data as stable references for climate research using AIRS and IRIS data.(More)