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2. Extended Red Emission (ERE) detected in the 30 Doradus nebula

Author

Darbon, Stephane, Perrin, Jean-Marie, and Sivan, Jean-Pierre

Subjects
Astrophysics
Abstract

We present low-dispersion visible spectra of two regions of the 30 Doradus nebula. When corrected for atomic continuum emission and divided by the spectrum of the exciting and illuminating stars, one of the two spectra clearly shows Extended Red Emission (ERE) superimposed on the scattering component. This ERE band peaks around 7270 \AA and is 1140 \AA width. HAC grains are found to explain the observed spectra in terms of scattering and luminescence., Comment: 6 pages, 2 figures, Latex, uses aa.sty. A&A in press

Published
1998

6. SOLSPEC onboard the International Space Station: Absolute Solar Spectral Irradiance in the Infrared Domain and Comparison with Recent Solar Models

Author

Thuillier, Gérard, Harder, J. W., Shapiro, Alexander, Woods, T. N., Perrin, Jean-Marie, Snow, Marty, Sukhodolov, T., Schmutz, Werner, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), Physikalisch-Meteorologisches Observatorium Davos/World Radiation Center (PMOD/WRC), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), and Cardon, Catherine

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Physics::Space Physics, [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; Onboard the SOLAR payload of the International Space Station (ISS), the SOLSPECspectrometer measures the solar spectral irradiance (SSI) from 170 to 2900 nm. This instrument uses lamps to monitor its behavior in orbit. In particular, it employs two tungsten ribbon lamps in the IR domain (1000-2900 nm). The infrared absolute irradiance scale was determined from preflight laboratory calibration measurements and the in-flight measurements gathered at first light in April 2008. We reported a systematic discrepancy between SOLAR-ISS measurements and the ATLAS 3 spectrum obtained from SOLSPEC observations onboard the shuttle-ATLAS missions with a discrepancy reaching 10 % at 1800 nm. If confirmed such a discrepancy would have strong implications for the Total Solar Irradiance (TSI) and the brightness temperature of the lower solar photosphere. However, the onboard lamp and solar data time series show that the IR spectrometer did not reach its permanent regime at first light but only after several months of operation. The solar data at first light and in permanent regime show a difference, which is wavelength dependent. Using that difference (or the data in permanent regime), we show that the SOLSPEC-ISS IR spectrum is consistent with the ATLAS 3 spectrum within their combined uncertainties. We present the properties of that corrected spectrum in terms of its contribution to TSI, the photospheric temperature, and comparisons with independently measured IR spectra from ground-based and on-orbit platforms.The absorption coefficient of the negative ion of hydrogen has its minimum around 1600 nm so that measurements at this wavelength provide a unique opportunity to probe the deepest layers of the solar photosphere. Thus the comparison between the IR measurements and model predictions is of particular interest for understanding the structure of the solar photosphere. We present a comparison of the corrected spectrum with theoretical spectra calculated with radiative transfer codes COSI and ATLAS9 and discuss different physical mechanisms which can affect the absolute level of the IR irradiance.

Published
2015

7. Tentative detection of clear-air turbulence using a ground-based Rayleigh lidar

Author

Hauchecorne, Alain, primary, Cot, Charles, additional, Dalaudier, Francis, additional, Porteneuve, Jacques, additional, Gaudo, Thierry, additional, Wilson, Richard, additional, Cénac, Claire, additional, Laqui, Christian, additional, Keckhut, Philippe, additional, Perrin, Jean-Marie, additional, Dolfi, Agnès, additional, Cézard, Nicolas, additional, Lombard, Laurent, additional, and Besson, Claudine, additional

Published
2016
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8. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author

Rotundi, Alessandra, Sierks, Holger, Della Corte, Vincenzo, Fulle, Marco, Gutierrez, Pedro J., Lara, Luisa, Barbieri, Cesare, Lamy, Philippe L., Rodrigo, Rafael, Koschny, Detlef, Rickman, Hans, Keller, Horst Uwe, Lopez-Moreno, Jose J., Accolla, Mario, Agarwal, Jessica, A'Hearn, Michael F., Altobelli, Nicolas, Angrilli, Francesco, Barucci, M. Antonietta, Bertaux, Jean-Loup, Bertini, Ivano, Bodewits, Dennis, Bussoletti, Ezio, Colangeli, Luigi, Cosi, Massimo, Cremonese, Gabriele, Crifo, Jean-Francois, Da Deppo, Vania, Davidsson, Björn, Debei, Stefano, De Cecco, Mariolino, Esposito, Francesca, Ferrari, Marco, Fornasier, Sonia, Giovane, Frank, Gustafson, Bo, Green, Simon F., Groussin, Olivier, Gruen, Eberhard, Guettler, Carsten, Herranz, Miguel L., Hviid, Stubbe F., Ip, Wing, Ivanovski, Stavro, Jernimo, Jose M., Jorda, Laurent, Knollenberg, Joerg, Kramm, Rainer, Kuehrt, Ekkehard, Kueppers, Michael, Lazzarin, Monica, Leese, Mark R., Lopez-Jimenez, Antonio C., Lucarelli, Francesca, Lowry, Stephen C., Marzari, Francesco, Epifani, Elena Mazzotta, McDonnell, J. Anthony M., Mennella, Vito, Michalik, Harald, Molina, Antonio, Morales, Rafael, Moreno, Fernando, Mottola, Stefano, Naletto, Giampiero, Oklay, Nilda, Ortiz, Jose L., Palomba, Ernesto, Palumbo, Pasquale, Perrin, Jean-Marie, Rodriguez, Julio, Sabau, Lola, Snodgrass, Colin, Sordini, Roberto, Thomas, Nicolas, Tubiana, Cecilia, Vincent, Jean-Baptiste, Weissman, Paul, Wenzel, Klaus-Peter, Zakharov, Vladimir, Zarnecki, John C., Rotundi, Alessandra, Sierks, Holger, Della Corte, Vincenzo, Fulle, Marco, Gutierrez, Pedro J., Lara, Luisa, Barbieri, Cesare, Lamy, Philippe L., Rodrigo, Rafael, Koschny, Detlef, Rickman, Hans, Keller, Horst Uwe, Lopez-Moreno, Jose J., Accolla, Mario, Agarwal, Jessica, A'Hearn, Michael F., Altobelli, Nicolas, Angrilli, Francesco, Barucci, M. Antonietta, Bertaux, Jean-Loup, Bertini, Ivano, Bodewits, Dennis, Bussoletti, Ezio, Colangeli, Luigi, Cosi, Massimo, Cremonese, Gabriele, Crifo, Jean-Francois, Da Deppo, Vania, Davidsson, Björn, Debei, Stefano, De Cecco, Mariolino, Esposito, Francesca, Ferrari, Marco, Fornasier, Sonia, Giovane, Frank, Gustafson, Bo, Green, Simon F., Groussin, Olivier, Gruen, Eberhard, Guettler, Carsten, Herranz, Miguel L., Hviid, Stubbe F., Ip, Wing, Ivanovski, Stavro, Jernimo, Jose M., Jorda, Laurent, Knollenberg, Joerg, Kramm, Rainer, Kuehrt, Ekkehard, Kueppers, Michael, Lazzarin, Monica, Leese, Mark R., Lopez-Jimenez, Antonio C., Lucarelli, Francesca, Lowry, Stephen C., Marzari, Francesco, Epifani, Elena Mazzotta, McDonnell, J. Anthony M., Mennella, Vito, Michalik, Harald, Molina, Antonio, Morales, Rafael, Moreno, Fernando, Mottola, Stefano, Naletto, Giampiero, Oklay, Nilda, Ortiz, Jose L., Palomba, Ernesto, Palumbo, Pasquale, Perrin, Jean-Marie, Rodriguez, Julio, Sabau, Lola, Snodgrass, Colin, Sordini, Roberto, Thomas, Nicolas, Tubiana, Cecilia, Vincent, Jean-Baptiste, Weissman, Paul, Wenzel, Klaus-Peter, Zakharov, Vladimir, and Zarnecki, John C.

Abstract

Critical measurements for understanding accretion and the dust/gas ratio in the solar nebula, where planets were forming 4.5 billion years ago, are being obtained by the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency's Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 and 3.4 astronomical units inbound, GIADA and OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) detected 35 outflowing grains of mass 10(-10) to 10(-7) kilograms, and 48 grains of mass 10(-5) to 10(-2) kilograms, respectively. Combined with gas data from the MIRO (Microwave Instrument for the Rosetta Orbiter) and ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instruments, we find a dust/gas mass ratio of 4 +/- 2 averaged over the sunlit nucleus surface. A cloud of larger grains also encircles the nucleus in bound orbits from the previous perihelion. The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails.

Published
2015
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9. Set-up of a ground-based Rayleigh lidar to detect clear air turbulence

Author

Hauchecorne, Alain, Cot, Charles, Dalaudier, Francis, Porteneuve, Jacques, Gaudo, Thierry, Wilson, Richard, Cénac, Claire, Laqui, Christian, Keckhut, Philippe, Perrin, Jean-Marie, Dolfi, Agnès, Cézard, Nicolas, Lombard, Laurent, Besson, Claudine, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), TROPO - LATMOS, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), International Coordination Group on Laser Atmospheric Studies ( ICLAS ), ONERA, and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)

Subjects
Physics::Fluid Dynamics, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Physics::Atmospheric and Oceanic Physics
Abstract

International audience; Atmospheric gravity waves and turbulence generate small-scale fluctuations of wind, pressure, density and temperature in the atmosphere. These fluctuations represent a real danger for commercial aircrafts and are known under the generic name of Clear Air Turbulence (CAT). They are not resolved in weather forecast models and are therefore unpredictable. A ground-based Rayleigh lidar was designed and implemented to remotely detect and characterize the atmospheric variability induced by gravity waves and turbulence in vertical scales between 10m and 1000m. Field measurements at Observatoire de Haute-Provence (France) have shown that the built lidar device was actually able to detect episodes of turbulence. This is to our knowledge the first Rayleigh lidar system able to detect clear air turbulence. The built lidar device may serve as a test bed for the definition of embarked CAT detection lidar systems on board airliners.

Published
2010

10. IMADYN : A field campaign to evaluate the potential of infrasound monitoring for atmospheric dynamics studies

Author

Hauchecorne, Alain, Dalaudier, Francis, Cot, Charles, Blanc, Elisabeth, Pichon, Alexis Le, Perrin, Jean-Marie, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Détection et de Géophysique (CEA) (LDG), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), Société Française d'Acoustique - SFA, Leclere, Quentin, and Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Atmosphere, Infrasounds, [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Dynamics, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract

National audience; The infrasound monitoring is a new technique to study the dynamics of the upper atmosphere. Infrasound waves are reflected by the various atmospheric layers depending on the vertical profile of wind and temperature. The measurement of the characteristics of infrasound signals brings then very useful information on the structure and dynamics of the upper atmosphere. In the IMADYN project proposed to the French Agence National de la Recherche, specialists of atmospheric dynamics and infrasound atmospheric propagation will work together to assess the potential of the IMS network of microbarometers of the Comprehensive Nuclear-Test Ban Treaty-Organisation (CTBT-O), in order to improve our knowledge of the dynamics of the middle and upper atmosphere. The proposal is composed of two parts, the first one based on the exploitation of the existing IMS database in comparison with available meteorological and climatological atmospheric models. The second one is based on the organization of a field campaign at the Haute-Provence Observatory equipped with state of the art lidars and radars systems were microbarometers will be installed for a detailed study of infrasound propagation and atmospheric waves and perturbations.

Published
2010

11. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author

Rotundi, Alessandra, primary, Sierks, Holger, additional, Della Corte, Vincenzo, additional, Fulle, Marco, additional, Gutierrez, Pedro J., additional, Lara, Luisa, additional, Barbieri, Cesare, additional, Lamy, Philippe L., additional, Rodrigo, Rafael, additional, Koschny, Detlef, additional, Rickman, Hans, additional, Keller, Horst Uwe, additional, López-Moreno, José J., additional, Accolla, Mario, additional, Agarwal, Jessica, additional, A’Hearn, Michael F., additional, Altobelli, Nicolas, additional, Angrilli, Francesco, additional, Barucci, M. Antonietta, additional, Bertaux, Jean-Loup, additional, Bertini, Ivano, additional, Bodewits, Dennis, additional, Bussoletti, Ezio, additional, Colangeli, Luigi, additional, Cosi, Massimo, additional, Cremonese, Gabriele, additional, Crifo, Jean-Francois, additional, Da Deppo, Vania, additional, Davidsson, Björn, additional, Debei, Stefano, additional, De Cecco, Mariolino, additional, Esposito, Francesca, additional, Ferrari, Marco, additional, Fornasier, Sonia, additional, Giovane, Frank, additional, Gustafson, Bo, additional, Green, Simon F., additional, Groussin, Olivier, additional, Grün, Eberhard, additional, Güttler, Carsten, additional, Herranz, Miguel L., additional, Hviid, Stubbe F., additional, Ip, Wing, additional, Ivanovski, Stavro, additional, Jerónimo, José M., additional, Jorda, Laurent, additional, Knollenberg, Joerg, additional, Kramm, Rainer, additional, Kührt, Ekkehard, additional, Küppers, Michael, additional, Lazzarin, Monica, additional, Leese, Mark R., additional, López-Jiménez, Antonio C., additional, Lucarelli, Francesca, additional, Lowry, Stephen C., additional, Marzari, Francesco, additional, Epifani, Elena Mazzotta, additional, McDonnell, J. Anthony M., additional, Mennella, Vito, additional, Michalik, Harald, additional, Molina, Antonio, additional, Morales, Rafael, additional, Moreno, Fernando, additional, Mottola, Stefano, additional, Naletto, Giampiero, additional, Oklay, Nilda, additional, Ortiz, José L., additional, Palomba, Ernesto, additional, Palumbo, Pasquale, additional, Perrin, Jean-Marie, additional, Rodríguez, Julio, additional, Sabau, Lola, additional, Snodgrass, Colin, additional, Sordini, Roberto, additional, Thomas, Nicolas, additional, Tubiana, Cecilia, additional, Vincent, Jean-Baptiste, additional, Weissman, Paul, additional, Wenzel, Klaus-Peter, additional, Zakharov, Vladimir, additional, and Zarnecki, John C., additional

Published
2015
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12. Middle atmosphere monitoring and dynamical coupling mechanisms: Ground-based lidar and satellite instruments synergy

Author

Keckhut, Philippe, Hauchecorne, Alain, Claud, Chantal, Funatsu, B., Raju, Jaya Prakas, Charyulu, V., Marchand, Marion, Bekki, Slimane, Bencherif, H., Perrin, Jean-Marie, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique de l'atmosphère (LPA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), and Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[SDU]Sciences of the Universe [physics]
Abstract

International audience; The long-term cooling of the middle atmosphere as well as the atmospheric response to solar activity, result to radiative forcing, ozone chemistry and many dynamical feedbacks. The long-term monitoring as well as process studies require both ground-based and satellite observations. Temperature lidar provide reliable data, and long enough data series to evaluate satellite information and the quality of the measurement continuity from space while satellites allow to estimate the representativeness and sampling effects associated with lidar series. Planetary waves (and associated stratospheric warming) and mesospheric inversions induce the largest variability in this domain. However, atmospheric tides are also an important issue for both long-term monitoring and vertical coupling processes. Tides are investigated with lidar in the frame of the CAWSES tidal campaigns that are compared with different models such as dynamical, CTM, and CCM and SABER satellite. Comparisons show good agreements with models on the vertical and temporal behavior with however some differences on waves amplitudes.

Published
2009

13. Dynamics in the polar thermosphere after the coronal mass ejection of 28 October 2003 observed with the EPIS interferometer at Svalbard

Author

Thuillier, Gérard, Perrin, Jean-Marie, Lathuillere, Chantal, Hersé, Michel, Fuller-Rowell, T., Codrescu, M., Huppert, F., Fehrenbach, M., Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie de Grenoble (LPG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], HIGH-LATITUDE, COORDINATED MEASUREMENTS, NEUTRAL WINDS, Astrophysics::High Energy Astrophysical Phenomena, VERTICAL WIND ACTIVITY, Physics::Geophysics, F-REGION, MERIDIONAL WIND, GLOBAL-MODEL, Physics::Space Physics, SATELLITE DATA, Astrophysics::Solar and Stellar Astrophysics, AURORAL-ZONE, Physics::Atmospheric and Oceanic Physics, GEOMAGNETIC STORMS
Abstract

International audience; The upper atmosphere dynamics in the polar cap is mainly driven by ion-drag momentum sources imposed by the mapping of magnetosphere convection into the thermosphere/ionosphere and by Joule and auroral particle heating. Auroral particles also enhance conductivity particularly in the middle and lower ionosphere. Changes in the magnetospheric energy and momentum sources can significantly modify the wind circulation during geomagnetic storms. To observe these effects, a Michelson interferometer has been installed in Svalbard to measure winds in the thermosphere. Prior to 30 October 2003, cloud cover over Svalbard rendered the conditions unfavorable for optical observation. However, meteorological conditions improved after this date to enable the thermospheric response to the 28 October coronal mass ejection to be made. During quiet geomagnetic conditions measured wind velocities were in good agreement with those predicted by the Horizontal Wind Model (HWM). During disturbed geomagnetic conditions, HWM tended to underestimate the observed velocities. Comparison of the wind observations with a physical model tended to show reasonable agreement during both the strongly driven and recovery phase of the storm. Although the physical model did not always capture the timing of the rapid changes in the wind response in the early phase of the storm, the amplitudes of the fluctuations were in good agreement. After the initial phase the physical model agreed well with both the timing and amplitude of the meridional and zonal wind fluctuations. The meridional wind component was also derived from the EISCAT Svalbard Radar ion velocity and was found to be in close agreement with the optical winds observations.

Published
2005

14. Research of small Kuiper Belt Objects by Stellar Occultations

Author

Roques, Françoise, Lavillonnière, N., Auvergne, Michel, Chevreton, Michel, Colas, François, Lecacheux, Jean, Moncuquet, Michel, Perrin, Jean-Marie, Observatoire de Paris, Université Paris sciences et lettres (PSL), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), and Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Fast photometric observations of target stars in the ecliptic have been organised at the Pic du Midi Observatory (2-m TBL and T1M) and the Haute Provence Observatory (T193) in order to search for small Kuiper Belt Objects by stellar occultations. The target stars have been chosen in the Tycho catalog: 18-1201-1 (Vmag=12,4), 585-671-1 (Vmag=11.8), 4669-750-1 (Vmag=11.9 ), 548-592-1 (Vmag=10.9) and 583-907-1 (Vmag=12.8). They are O stars to optimize the brightness/apparent size ratio. The observation sampling was 20 Hz and we got good quality observation during 18 hours, 28 hours and 8 hours at TBL, T1M and T193, respectively. The r.m.s. signal fluctuations, which mainly varies with telescope diameter and star elevation, may be 0.014 for a 2-m telescope. Within such a signal, an event due to a 120 meters KBO diameter is detected at a 3 sigma r.m.s. level. A realistic size distribution in the KBO population leads to one such event for 27 hours observation (Roques and Moncuquet, Icarus, 147, 530, 2000). The observed events are presented and analyzed. This work was supported by the Programme National de Planetologie

Published
2001

17. Exo-zodiacal disk mapper: a space interferometer to detect and map zodiacal disks around nearby stars

Author

Reasenberg, Robert D., Bély, Pierre Y., Burg, Richard, Petro, Larry, Gay, Jean, Baudoz, Pierre, Rabbia, Yves, Perrin, Jean-Marie, Wade, Lawrence, Beichman, Charles C., Reasenberg, Robert D., Bély, Pierre Y., Burg, Richard, Petro, Larry, Gay, Jean, Baudoz, Pierre, Rabbia, Yves, Perrin, Jean-Marie, Wade, Lawrence, and Beichman, Charles C.

Abstract

We propose a concept for a space mission designed to make a survey of potential zodiacal dust disks around nearby stars in the mid-IR. We show that a 10-meter baseline nulling interferometer with two 0.6-meter apertures located in a 1 X 1 AU heliocentric orbit would allow for the survey of about 400 stars in the solar neighborhood and permit a first order determination of the disk inclination and of the dust density and temperature radius dependence. The high dynamic range of the instrument may also be used to study an additional astrophysical phenomena. Beyond its own scientific merit, such a mission would also serve as a technological precursor to a larger interferometer of the type being considered for the detection of earth-like planets.

Published
1998

25. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author

Della Corte, Vincenzo, Barucci, M. Antonietta, Jernimo, Jose M., Giovane, Frank, Vincent, Jean-Baptiste, Davidsson, Bjoern, Fornasier, Sonia, Snodgrass, Colin, Cremonese, Gabriele, Palumbo, Pasquale, McDonnell, J. Anthony M., Moreno, Fernando, Debei, Stefano, Bertini, Ivano, Sierks, Holger, Rodriguez, Julio, Molina, Antonio, Rickman, Hans, Bertaux, Jean-Loup, Kueppers, Michael, Michalik, Harald, Lara, Luisa, Ivanovski, Stavro, Fulle, Marco, Perrin, Jean-Marie, Ip, Wing, Thomas, Nicolas, Leese, Mark R., Lowry, Stephen C., Gutierrez, Pedro J., Groussin, Olivier, Lopez-Jimenez, Antonio C., Green, Simon F., Lazzarin, Monica, Lucarelli, Francesca, Tubiana, Cecilia, Keller, Horst Uwe, Kuehrt, Ekkehard, Agarwal, Jessica, Lamy, Philippe L., Angrilli, Francesco, Sabau, Lola, Sordini, Roberto, Bussoletti, Ezio, Zarnecki, John C., Guettler, Carsten, Naletto, Giampiero, Lopez-Moreno, Jose J., Herranz, Miguel L., Oklay, Nilda, Epifani, Elena Mazzotta, Altobelli, Nicolas, Crifo, Jean-Francois, Gruen, Eberhard, De Cecco, Mariolino, Barbieri, Cesare, Rodrigo, Rafael, Cosi, Massimo, Ortiz, Jose L., Kramm, Rainer, Esposito, Francesca, Ferrari, Marco, Wenzel, Klaus-Peter, Jorda, Laurent, A'Hearn, Michael F., Morales, Rafael, Accolla, Mario, Mennella, Vito, Koschny, Detlef, Hviid, Stubbe F., Bodewits, Dennis, Weissman, Paul, Mottola, Stefano, Colangeli, Luigi, Gustafson, Bo, Da Deppo, Vania, Rotundi, Alessandra, Zakharov, Vladimir, Marzari, Francesco, Knollenberg, Joerg, and Palomba, Ernesto

Subjects
13. Climate action, 530 Physics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Critical measurements for understanding accretion and the dust/gas ratio in the solar nebula, where planets were forming 4.5 billion years ago, are being obtained by the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency's Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 and 3.4 astronomical units inbound, GIADA and OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) detected 35 outflowing grains of mass 10(-10) to 10(-7) kilograms, and 48 grains of mass 10(-5) to 10(-2) kilograms, respectively. Combined with gas data from the MIRO (Microwave Instrument for the Rosetta Orbiter) and ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instruments, we find a dust/gas mass ratio of 4 +/- 2 averaged over the sunlit nucleus surface. A cloud of larger grains also encircles the nucleus in bound orbits from the previous perihelion. The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails.

26. IMADYN : A field campaign to evaluate the potential of infrasound monitoring for atmospheric dynamics studies

Author

Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) ; CNRS - INSU - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) - Université Pierre et Marie Curie (UPMC) - Paris VI, Institut Pierre-Simon-Laplace (IPSL) ; CNRS - Institut de recherche pour le développement [IRD] - CEA - CNES - INSU - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) - École normale supérieure [ENS] - Paris - Université Pierre et Marie Curie (UPMC) - Paris VI, Laboratoire de Géophysique (LDG) ; CEA, Observatoire de Haute-Provence (OHP) ; CNRS - INSU - Université de Provence - Aix-Marseille I, Société Française d'Acoustique - SFA, Hauchecorne, Alain, Dalaudier, Francis, Cot, Charles, Blanc, Elisabeth, Le Pichon, Alexis, Perrin, Jean-Marie, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) ; CNRS - INSU - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) - Université Pierre et Marie Curie (UPMC) - Paris VI, Institut Pierre-Simon-Laplace (IPSL) ; CNRS - Institut de recherche pour le développement [IRD] - CEA - CNES - INSU - Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) - École normale supérieure [ENS] - Paris - Université Pierre et Marie Curie (UPMC) - Paris VI, Laboratoire de Géophysique (LDG) ; CEA, Observatoire de Haute-Provence (OHP) ; CNRS - INSU - Université de Provence - Aix-Marseille I, Société Française d'Acoustique - SFA, Hauchecorne, Alain, Dalaudier, Francis, Cot, Charles, Blanc, Elisabeth, Le Pichon, Alexis, and Perrin, Jean-Marie

Abstract

National audience, The infrasound monitoring is a new technique to study the dynamics of the upper atmosphere. Infrasound waves are reflected by the various atmospheric layers depending on the vertical profile of wind and temperature. The measurement of the characteristics of infrasound signals brings then very useful information on the structure and dynamics of the upper atmosphere. In the IMADYN project proposed to the French Agence National de la Recherche, specialists of atmospheric dynamics and infrasound atmospheric propagation will work together to assess the potential of the IMS network of microbarometers of the Comprehensive Nuclear-Test Ban Treaty-Organisation (CTBT-O), in order to improve our knowledge of the dynamics of the middle and upper atmosphere. The proposal is composed of two parts, the first one based on the exploitation of the existing IMS database in comparison with available meteorological and climatological atmospheric models. The second one is based on the organization of a field campaign at the Haute-Provence Observatory equipped with state of the art lidars and radars systems were microbarometers will be installed for a detailed study of infrasound propagation and atmospheric waves and perturbations.

28. Les contes de la Révolution

Author

Bahier-Porte, Christelle, Institut d’Histoire des Représentations et des Idées dans les Modernités (IHRIM), École normale supérieure de Lyon (ENS de Lyon)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML), Université de Lyon-Université de Lyon-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Corinne Saminadayar-Perrin, Jean-Marie Roulin, École normale supérieure - Lyon (ENS Lyon)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML), Université de Lyon-Université de Lyon-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université Jean Monnet [Saint-Étienne] (UJM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), and Bahier-Porte, Christelle

Subjects
[SHS.LITT] Humanities and Social Sciences/Literature, [SHS.LITT]Humanities and Social Sciences/Literature, Contes -- 18e siècle, Révolution française
Abstract

International audience; Au moment du surgissement de la Révolution, paraissent de nombreux contes, merveilleux ou moraux, qui s’emparent de l’événement et en proposent une représentation. Dans leur registre propre, celui du fabuleux, les contes invitent les princes comme les citoyens à l’interprétation d’une actualité qui sidère par sa folie et son invraisemblance. Participant pour certains d’un discours de propagande, ils donnent surtout à voir, par des images saisissantes, les fantasmes que génère la Révolution, par delà les camps. Ils s’inscrivent également dans le débat politique en proposant des expériences inédites, permises par la liberté d’invention du conte, ou en imaginant un avenir, souvent inquiétant, à cette actualité qui semble avoir suspendu le temps de l’Histoire.

Published
2018

29. Cometary science. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun.

Author

Rotundi A, Sierks H, Della Corte V, Fulle M, Gutierrez PJ, Lara L, Barbieri C, Lamy PL, Rodrigo R, Koschny D, Rickman H, Keller HU, López-Moreno JJ, Accolla M, Agarwal J, A'Hearn MF, Altobelli N, Angrilli F, Barucci MA, Bertaux JL, Bertini I, Bodewits D, Bussoletti E, Colangeli L, Cosi M, Cremonese G, Crifo JF, Da Deppo V, Davidsson B, Debei S, De Cecco M, Esposito F, Ferrari M, Fornasier S, Giovane F, Gustafson B, Green SF, Groussin O, Grün E, Güttler C, Herranz ML, Hviid SF, Ip W, Ivanovski S, Jerónimo JM, Jorda L, Knollenberg J, Kramm R, Kührt E, Küppers M, Lazzarin M, Leese MR, López-Jiménez AC, Lucarelli F, Lowry SC, Marzari F, Epifani EM, McDonnell JA, Mennella V, Michalik H, Molina A, Morales R, Moreno F, Mottola S, Naletto G, Oklay N, Ortiz JL, Palomba E, Palumbo P, Perrin JM, Rodríguez J, Sabau L, Snodgrass C, Sordini R, Thomas N, Tubiana C, Vincent JB, Weissman P, Wenzel KP, Zakharov V, and Zarnecki JC

Abstract

Critical measurements for understanding accretion and the dust/gas ratio in the solar nebula, where planets were forming 4.5 billion years ago, are being obtained by the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency's Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 and 3.4 astronomical units inbound, GIADA and OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) detected 35 outflowing grains of mass 10(-10) to 10(-7) kilograms, and 48 grains of mass 10(-5) to 10(-2) kilograms, respectively. Combined with gas data from the MIRO (Microwave Instrument for the Rosetta Orbiter) and ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instruments, we find a dust/gas mass ratio of 4 ± 2 averaged over the sunlit nucleus surface. A cloud of larger grains also encircles the nucleus in bound orbits from the previous perihelion. The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails., (Copyright © 2015, American Association for the Advancement of Science.)

Published
2015
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