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  • Astrophysics of high energy | UnivEarthS
    emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search Post Doctoral Research Fellow IGOSat internship PhD position Effect of the North South dichotomy on the thermal structure and evolution of Mars Search this site September Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Sign in Password forgotten Home Astrophysics of high energy Echoes of multiple outbursts of Sagittarius A revealed by Chandra 15 10 2013 Using the Chandra X ray Observatory a team of scientists led by researchers of the APC laboratory in Paris and SAp CEA Saclay France has been studying the diffuse X ray emission coming from a region close to the center of our Galaxy Astrophysics of high energy Read more Job Offer 22 02 2013 One postdoctoral position in Astronomical Data Analysis In the framework of the UnivEarthsS LabEx program the astrophysics division of CEA Saclay is offering one postdoctoral position for an initial period of 2 years to work with Stephane Corbel and Jean Luc Starck on radio transients detection Astrophysics of high energy Read more Next conference on radioastronomy 28 11 2012 Conference The Modern Radio Universe in Bonn from 22 to 26 april 2013 informations here Astrophysics of high energy E2 project presentation From the micro quasars of the dark ages to the super massive black holes of the local universe SCIENTIFIC PROGRAM 1 Scientific context Astrophysics of high energy Read more I4 project publications Astrophysics of high energy I4 project team Anne Decourchelle AIM Régis Terrier APC

    Original URL path: http://www.univearths.fr/en/category/domaines/astrophysics-high-energy?mini=node%2F333%2F2015-09 (2015-10-10)
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  • E2 project presentation | UnivEarthS
    binaries heated the intergalactic medium over large volumes of space during the re ionization era of the universe Feedback from accreting stellar black holes at that epoch may have direct implications for models on the minimum mass required for the formation of dwarf galaxies and for existing and future atomic hydrogen radio surveys of HI in the early universe We propose to study this feedback theoretically and through intensive simulations Reionization era from Robertson B E et al 2010 Nature 468 49 b The feedback of super massive black holes on the galaxy bulges in AGN It is well known that all galaxies show a tight correlation between the mass of their central super massive black hole and the velocity dispersion of the stars in their bulge This proves that there is some form of feedback between the black hole growth and the galaxy evolution The nature of this feedback however is not known and remains one of the crucial mysteries of modern astronomy We intend to investigate the nature of the feedback most probably relativistic particle ejectionsand or plasma outflows with the study of a selected sample of active galactic nuclei to be performed with the data of present high energy space telescopes as XMM Integral Fermi and Hess and future facilities like Astro H Radio image of the Cygnus A active galactic nuclei NRAO c Impact on the environment of the past intense activity of the super massive black hole at the galactic center The super massive black hole at the center of our own Galaxy associated to the source Sgr A is extremely quiet at the present times and characterizes the quiescent phase of the black holes in the galactic nuclei of the local universe However our recent X ray and gamma ray observations with XMM and Integral of the molecular clouds of the central zone have shown that Sgr A underwent a powerful outburst few hundred years ago during which its X ray luminosity increased by a factor of over one million This phase of activity lasted for about 400 years and left its imprint in the molecular clouds of the region that reflect this radiation towards us with a delay that depends on their spatial distribution around the center The molecular cloud emission variations allow us to explore both the behavior of the black hole in the past and the very complex matter distribution in the central region Such an active phase of the central black hole must have also induced variations in its complex interstellar environment Evidences for such impact on the chemistry of clouds have been already found with observations of radio molecular lines such as those of SiO and HCO We propose to open a new field of investigation in our laboratories to be carried out in parallel to our large program of X ray and gamma ray observations of the Galactic Center in order to study ionization heating and chemistry changes of the surrounding interstellar matter ISM induced by the past

    Original URL path: http://www.univearths.fr/en/e2-project-presentation (2015-10-10)
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  • I4 project publications | UnivEarthS
    From the Big Bang to the future Universe Support au PCCP The transient catastrophic Universe Interface projects Geoparticles Fundamental physics and Geophysics in space From dust to planets Former Interface projects Formation and early evolution of Planetary systems The youth of cosmic rays and their emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite

    Original URL path: http://www.univearths.fr/en/node/220 (2015-10-10)
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  • I4 project team | UnivEarthS
    future Universe Support au PCCP The transient catastrophic Universe Interface projects Geoparticles Fundamental physics and Geophysics in space From dust to planets Former Interface projects Formation and early evolution of Planetary systems The youth of cosmic rays and their emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY

    Original URL path: http://www.univearths.fr/en/i4-project-team (2015-10-10)
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  • I2 project results / experiences | UnivEarthS
    and early evolution of Planetary systems The youth of cosmic rays and their emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search Post Doctoral Research Fellow IGOSat internship PhD position Effect of the North South dichotomy on the thermal structure and evolution of Mars Search this site October Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sign in Password forgotten Home OVERVIEW Scientific areas I2 project results experiences Muon telescopes for volcano tomography Previously built telescopes are being improved The time resolution of the electronics of the Guadeloupe telescope has been improved from 10ns to 1ns This improves the capability to flag particles in particular it is now possible to determine the flight direction and thus to remove a large fraction of the background The Guadeloupe telescope has also received a rotating base allowing for easier orientation of the instrument The MEMPHYNO R D

    Original URL path: http://www.univearths.fr/en/i2-project-results-experiences (2015-10-10)
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  • I2 project team | UnivEarthS
    From MeV to TeV NOVAs Gamma Ray Bursts as Multi messengers Advanced time series analysis Former Exploratory projects Formation of dunes and climate on Titan Impact of black holes on their environment Frontier projects Earth as a living planet From the Big Bang to the future Universe Support au PCCP The transient catastrophic Universe Interface projects Geoparticles Fundamental physics and Geophysics in space From dust to planets Former Interface projects Formation and early evolution of Planetary systems The youth of cosmic rays and their emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search Post Doctoral Research Fellow IGOSat internship PhD position Effect of the North South dichotomy on the thermal structure and evolution of Mars Search this site October Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sign in Password forgotten Home OVERVIEW Scientific areas I2 project team APC Luca Agostino PhD student Anatael

    Original URL path: http://www.univearths.fr/en/i2-project-team (2015-10-10)
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  • I2 project presentation | UnivEarthS
    8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sign in Password forgotten Home OVERVIEW Scientific areas I2 project presentation Elementary particles can nowadays be used as probes of their sources or of the matter they have traversed We propose to investigate the use of particles as probes of the Earth s interior in two ways 1 neutrinos from the decay of radioactive elements in the crust and mantle called geoneutrinos to gather information on the composition and distribution of the radioactive elements whose decay provides a large fraction of the Earth s thermal power 2 geophysical tomography with muon telescopes to map the internal density structure of volcanoes unstable cliffs and geological layers located over mines nuclear waste storages and CO2 reservoirs The main difficulty in geo neutrino detection lies in their weak flux with respect to other antineutrinos mainly those issued from power reactors which are on the other hand the signal for reactor neutrino experiments such as Double Chooz in the Ardennes region in which the APC group has a leading role Conversely muons represent one of the most dangerous backgrounds for neutrino experiments located underground The research program we propose is along the following lines 1 The modelling of muon propagation through the rock is critical to extract the relevant information from the muon telescope data Detailed simulations have been carried out by the APC group to predict the background to the Double Chooz experiment and independently by the IPGP group to predict the signal in muon telescopes A synergy of the two teams will lead to the development of the most accurate methods for the inverse tomography problem 2 An accurate modelling of reactor anti neutrino spectra can be obtained

    Original URL path: http://www.univearths.fr/en/i2-project-presentation (2015-10-10)
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  • F3 project results / experiences | UnivEarthS
    ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search Post Doctoral Research Fellow IGOSat internship PhD position Effect of the North South dichotomy on the thermal structure and evolution of Mars Search this site October Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sign in Password forgotten Home OVERVIEW Scientific areas F3 project results experiences Past results The efforts deployed by the members of the teams were focused on the development of a sparse imager for aperture synthesis imaging of data acquired with new generation of giant radiotelescope such as LOFAR and SKA The image reconstruction from simulated and real data has demonstrated the robustness of such imager as well as its capacity to produce super resolved images see the CEA news here The page associated with the development of the code is on the CosmoStat website here All details and results were published in A A Garsden et al 2015 check publication section Current developments The next step is the development of a 3D extension of the code enabling the robust temporal reconstruction of the data containing information about transient radio sources The latter are rather difficult to image correctly with the classical imaging method used in interferometry The third step is the developement of a multi channel imager which accounts for the frequency information of the data enabling not only the reconstruction of source flux but also to put constraint of their spectral behavior reconstructing spectral index information by applying a sparse component seperation technique These two steps

    Original URL path: http://www.univearths.fr/en/f3-project-results-experiences (2015-10-10)
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