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Dr Anna Curir (Astronomical Observatory of Turin - Italy)26/07/2010 17:25Structure Formation & N-body simulationsPosterWe present a set of numerical Nbody simulations to investigate the formation of the outer Milky Way's halo trough accretion events. The aim is to explore the orbital conditions where a retrograde signal in the outer part of the halo can be obtained in order to give a possible explanation of the observed rotational properties of the Milky Way stellar halo.Go to contribution page
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Dr carlo artemi (Scientifich High School " E . Majorana " Orvieto , Italy)26/07/2010 17:26Structure Formation & N-body simulationsPosterStudies of dark matter particles are done , or by attempt to produce it ( i.e. by LHC ) or by searching indirect signs of it ( let think to Pamela signal for possible decay of dark matter particles in high energy electron ) In this paper it’s showed a new way to study dark matter and dark energy too . , The paper starts with a description of the citizen science project Galaxyzoo with an...Go to contribution page
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Dr William GILLARD (KTH ; OKC)26/07/2010 17:27Dark Matter Direct SearchesPosterThe PAMELA satellite experiment is performing a precision study of the cosmic radiation with a particular focus on antiparticles. PAMELA is equipped with a silicon-microstrip magnetic spectrometer and silicon-tungsten imaging calorimeter. These two instruments allow particle species to be reliably identified. Particle rigidity and sign-of-charge is determined by fitting the track recorded by...Go to contribution page
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Mme Cecilia Levy (Subatech)26/07/2010 17:28Dark Matter Direct SearchesPosterThe direct search for dark matter experiment, XENON100, using liquid xenon has been in the process of taking data since January 2010 and will con- tinue to do so for another year to reach a never yet achieved sensitivity on the WIMP cross section and ultimately, maybe detect a WIMP. In addition, the experiment is already being pushed towards its next phase, XENON1T, which will be much...Go to contribution page
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Prof. Li-Chin Yeh (National Hsinchu University of Education)26/07/2010 17:29PosterIt is known that galactic centers could host single or binary black holes, and observations show that black-hole masses are correlated with the properties of galaxies. Moreover, in terms of center's density profiles, early-type galaxies can be classified into power-law or core galaxies. Therefore, in this project, we study the dynamics near galactic centers with given galactic...Go to contribution page
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Dr Miguel Felizardo (Centro de Física Nuclear, University of Lisbon)26/07/2010 17:30Dark Matter Direct SearchesPosterWe describe new instrumentation for the SIMPLE experiment, and its use in identifying, validating and rejecting non-WIMP backgrounds in the project measurements. Besides acoustic intrinsic discrimination, evidence is provided for a possible discrimination between alpha and neutron events via analysis of the signal parameters.Go to contribution page
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Dr Jean-Luc Gauvreau (Occidental College)26/07/2010 17:32Dark Matter Direct SearchesPosterUsing a 10cm-long time projection chamber operating at 40 Torrs, we measured the mobility and diffusion of CS2- ions using pure CS2 and using mixtures where He, Ne, Ar and CF4 were added as a second gas. Measurements were made with electric fields varying from 40 to 600 V/cm. The electron temperature and drift velocity for all those mixtures and fileds were obtained from the code MAGBOLTZ. ...Go to contribution page
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Dr Edmond Giraud (LPTA Universite Montpellier 2 CNRS/IN2P3)26/07/2010 17:33PosterWe study spectral evolution of galaxies in a magnitude limited sample in a pencil beam of ~10' x 10' from z = 1 down to 0.3. We concentrate on the large structures along the line of sight, and we bin our individual galaxy spectra to obtain representative high S/N spectra of each structure. We divide the resulting average spectra in three groups to facilitate the analysis: galaxies with pure...Go to contribution page
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Bibhushan Shakya (Cornell University)26/07/2010 17:34PosterEnergetic positrons produced in annihilation or decay of dark matter particles in the Milky Way can serve as an important indirect signature of dark matter. Computing the positron flux expected in a given dark matter model involves solving transport equations, which account for interaction of positrons with matter and galactic magnetic fields. Existing calculations solve the equations inside...Go to contribution page
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