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Your search keyword '"Neichel, B."' showing total 21 results
Start Over Author "Neichel, B." Publisher oxford university press (oup)
21 results on '"Neichel, B."'

5. Towards an automatic wind speed and direction profiler for Wide Field adaptive optics systems

Author

Sivo, G., Turchi, A., Masciadri, E., Guesalga, A., Neichel, B., Sivo, A, Masciadri, A, Guesalaga, A., ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Pontificia Universidad Católica de Chile (UC), ITA, FRA, CHL, and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Site testing, Astronomy and Astrophysics, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], 01 natural sciences, Wide field, Wind speed, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Large sample, 010309 optics, Space and Planetary Science, 0103 physical sciences, Adaptive optics systems, Adaptive optics, 010303 astronomy & astrophysics, Remote sensing
Abstract

9 figures, 2 tables, MNRAS accepted; International audience; Wide Field Adaptive Optics (WFAO) systems are among the most sophisticated AO systems available today on large telescopes. The knowledge of the vertical spatio-temporal distribution of the wind speed (WS) and direction (WD) are fundamental to optimize the performance of such systems. Previous studies already proved that the Gemini Multi-Conjugated AO system (GeMS) is able to retrieve measurements of the WS and WD stratification using the SLODAR technique and to store measurements in the telemetry data. In order to assess the reliability of these estimates and of the SLODAR technique applied to such a kind of complex AO systems, in this study we compared WS and WD retrieved from GeMS with those obtained with the atmospherical model Meso-Nh on a rich statistical sample of nights. It has been previously proved that, the latter technique, provided an excellent agreement with a large sample of radiosoundings both, in statistical terms and on individual flights. It can be considered, therefore, as an independent reference. The excellent agreement between GeMS measurements and the model that we find in this study, proves the robustness of the SLODAR approach. To by-pass the complex procedures necessary to achieve automatic measurements of the wind with GeMS, we propose a simple automatic method to monitor nightly WS and WD using the Meso-Nh model estimates. Such a method can be applied to whatever present or new generation facilities supported by WFAO systems. The interest of this study is, therefore, well beyond the optimization of GeMS performance.

Published
2018
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15. Hubble Frontier Fields: the geometry and dynamics of the massive galaxy cluster merger MACSJ0416.1-2403

Author

Jauzac, M., primary, Jullo, E., additional, Eckert, D., additional, Ebeling, H., additional, Richard, J., additional, Limousin, M., additional, Atek, H., additional, Kneib, J.-P., additional, Clement, B., additional, Egami, E., additional, Harvey, D., additional, Knowles, K., additional, Massey, R., additional, Natarajan, P., additional, Neichel, B., additional, and Rexroth, M., additional

Published
2014
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16. Gemini multiconjugate adaptive optics system review - I. Design, trade-offs and integration

Author

Rigaut, F., primary, Neichel, B., additional, Boccas, M., additional, d'Orgeville, C., additional, Vidal, F., additional, van Dam, M. A., additional, Arriagada, G., additional, Fesquet, V., additional, Galvez, R. L., additional, Gausachs, G., additional, Cavedoni, C., additional, Ebbers, A. W., additional, Karewicz, S., additional, James, E., additional, Luhrs, J., additional, Montes, V., additional, Perez, G., additional, Rambold, W. N., additional, Rojas, R., additional, Walker, S., additional, Bec, M., additional, Trancho, G., additional, Sheehan, M., additional, Irarrazaval, B., additional, Boyer, C., additional, Ellerbroek, B. L., additional, Flicker, R., additional, Gratadour, D., additional, Garcia-Rissmann, A., additional, and Daruich, F., additional

Published
2013
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21. Simulating the physics and mass assembly of distant galaxies out toz∼ 6 with the E-ELT

Author

Sune Toft, Piero Rosati, Mathieu Puech, Andrea Cimatti, T. Fusco, Benoit Neichel, Puech, M., Rosati, P., Toft, S., Cimatti, A., Neichel, B., and Fusco, T.

Subjects
Physics, Spatially resolved, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Redshift, Galaxy, 010309 optics, Integral field spectrograph, Space and Planetary Science, 0103 physical sciences, Galaxy formation and evolution, Extremely Large Telescope, Adaptive optics, Spectroscopy, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

One of the main scientific goals of the future European Extremely Large Telescope (E-ELT) will be to understand the mass assembly process in galaxies as a function of cosmic time. To this aim, a multi-object, adaptive optics (AO)-assisted integral field spectrograph will be required to map the physical and chemical properties of very distant galaxies. In this paper, we examine the ability of such an instrument to obtain spatially resolved spectroscopy of a large sample of massive (0.1 ≤ M stellar ≤ 5 × 10 11 M ⊙ ) galaxies at 2 ≤ z 5) redshift bin. We find that a survey of N gal galaxies that fulfil the range of scientific goals can be achieved with an ∼90-night programme on the E-ELT, provided a multiplex capability M ∼ N gal /8.

Published
2010
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