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Paris Observatory

Country: France
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56 Projects, page 1 of 12
  • Funder: SNSF Project Code: 145901
    Funder Contribution: 102,050
    Partners: Paris Observatory
  • Funder: EC Project Code: 235753
    Partners: Paris Observatory
  • Funder: EC Project Code: 624287
    Partners: Paris Observatory
  • Open Access mandate for Publications
    Funder: EC Project Code: 660081
    Overall Budget: 185,076 EURFunder Contribution: 185,076 EUR
    Partners: Paris Observatory

    After more than 20 years of fundamental research, atom interferometers have reached sensitivity and accuracy levels competing with or beating inertial sensors based on different technologies. Atom interferometers offer interesting applications in geophysics, inertial sensing, metrology and tests of fundamental physics. Recently, a growing interest of the application of atom interferometry to gravitational wave detection and geophysics has been drawn. These applications beyond the pure scope of atomic physics require the development of more performant atomic inertial sensors, particularly for the use of matter-wave interferometers in gravitational wave detectors, where sensitivity levels far beyond the state of the art must be demonstrated. The proposed project aims at contributing filling this gap by studying new atom and optical interferometry techniques, in order to significantly improve the performances of matter -wave gravitation sensors. The proposed MSC action will significantly impact the design of a new class of matter-wave gravitation sensors, which are under study in several countries in the world. In the excellence metrology environment of SYRTE, the MSC applicant will foster challenging developments in atom interferometers, with a high impact on the communities of atomic physics, geophysics and gravitational wave detection. On this path, the Experienced Researcher will benefit from an original and efficient training by the host group through knowledge transfer, acquisition of new scientific and management skills, enlargement of her professional network and development of her track record.

  • Open Access mandate for Publications and Research data
    Funder: EC Project Code: 798909
    Overall Budget: 173,076 EURFunder Contribution: 173,076 EUR
    Partners: Paris Observatory

    The direct detection of young and warm extrasolar giant planets in the habitable zone of nearby cool stars is one of the major goals of future ground-based high-contrast imaging (HCI) instruments. The motive is to study the physical and chemical properties of exoplanetary atmospheres and search for evidences of biosignatures. Direct imaging is the required technique to characterize exoplanets with spectroscopy of their atmospheres. However, the ability to resolve planet signal above bright stellar halo is still a challenge. A coronagraph is an optic, which suppresses the diffraction effects of the telescope by blocking the starlight but wavefront errors arising due to Earth’s atmospheric turbulence scatter starlight over the science region of interest and bury faint planet photons in stellar/speckle noise. Most of these errors are mitigated by the dedicated Extreme Adaptive Optics instruments. However, under the AO/ExAO WF residuals, imaging and characterizing exoplanets at small angles require achieving detection limit 10 to 100 times better than the state of the art. No existing ground-based HCI instruments have successfully disentangled the planet signals from stellar residuals at small angles. The proposal seek to develop and demonstrate wavefront sensing and control techniques that will enhance the planet detection sensitivity at small angles and will aid the existing HCI instruments in directly imaging young Jovian-like exoplanets at small angles around nearby stars. This research proposal will also enable next generation of exoplanets characterization instruments with the European Extremely Large Telescope to perform low resolution spectroscopy of Neptune or Super-Earth exoplanets in the HZ of low mass stars (for example M-type).