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Stavros KATSANEVAS (CNRS/IN2P3)16/10/2017, 09:30
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Prof. Nergis Mavalvala (Massachusetts Institute of Technology)16/10/2017, 10:15
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Fabio Iocco (ICTP-SAIFR)16/10/2017, 11:30
I will illustrate the current status of the determination of the Dark Matter content and distribution within our own Galaxy -the Milky Way- achieved by making use of improved methods and enhanced databases.
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After this, I will show how the current uncertainties arising from such state-of-the-art astrophysical methods and observations affect the determination of Dark Matter properties, offering... -
Mr J. de Swart (University of Amsterdam)16/10/2017, 11:45
This contribution is a historical reflection on the rise of the dark matter hypothesis. Specifically, it focusses on understanding how the problem of dark matter came to matter in the early 1970s, decades after it had been famously introduced by Fritz Zwicky (1933). What were the conditions that brought about new conclusions on the existence of dark matter in this period? I will argue that the...
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Dr Hamish Silverwood (Institut de Ciències del Cosmos, Universitat de Barcelona)16/10/2017, 12:00
The local dark matter density is required to interpret results from direct detection experiments, whether they are searching for WIMPs, sterile neutrinos, or axions. Here I give an update to our ongoing project to determine the local DM density using stellar motions and our advanced Jeans equation based analysis. This includes our recent measurement using SDSS-SEGUE G-dwarfs, and a look ahead...
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Richard Bartels (University of Amsterdam)16/10/2017, 12:15
An anomalous excess at energies of a few GeV is seen in the Fermi-LAT data.
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Being well fit by an NFW profile and centered on the Galactic Center, this so-called Galactic Center Excess (GCE) has generated a lot of excitement over the past years due to its consistency with a dark matter origin. However, there exist viable astrophysical explanations, most notably unresolved millisecond pulsars.... -
Antonella Garzilli16/10/2017, 12:30
We reconsider the problem of determining the warmness of dark matter
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from the growth of large scale structures. In particular, we have
re-analyzed the previous work of Viel et al 2013, based on high
resolution Lyman-alpha forest spectra. In fact, the flux power
spectrum exhibits a cut-off below ~ 1.5 Mpc/h, this may be explained
by the temperature of the intergalactic medium (IGM) or be due... -
Lars Bergstrom (Stockholm University)16/10/2017, 13:45
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Tim M.P. Tait (University of California, Irvine)16/10/2017, 14:30
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Jocelyn Monroe (RHUL)16/10/2017, 15:15
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Matthew Kleban (New York University)17/10/2017, 10:00
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Hiranya Peiris17/10/2017, 10:45
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Benjamin Wallisch (DAMTP, University of Cambridge)17/10/2017, 12:00
Future cosmic microwave background (CMB) and large-scale structure (LSS) observations will provide us with percent-level measurements of the radiation content of the universe. I will show this by discussing current observational constraints and, in particular, providing forecasts of the capabilities of future CMB and LSS experiments such as CMB-S4 and DESI. In addition, I will provide...
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Daniele Gaggero17/10/2017, 12:15
The idea that primordial black holes (PBHs) of O(10) solar mass can account for all the dark matter has been recently reconsidered after the discovery of a gravitational wave signal.
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We present a robust bound on this scenario based on a novel approach: We model in a conservative way the accretion of gas and the subsequent radio and X-ray emission originating by a population of PBHs in our... -
Thomas Edwards (University of Amsterdam)17/10/2017, 12:30
Indirect dark matter (DM) searches are one of the fundamental techniques used to probe the particle nature of DM. Given the increasing interest in the community in non-WIMP scenarios, it is vital to systematically reconsider optimal strategies for observation campaigns of current and future telescopes that cover a large range of DM models and signals. In this endeavour, it is important to...
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Emma Storm (GRAPPA, University of Amsterdam)17/10/2017, 12:45
Template fitting of the gamma-ray sky has been quite successful in both understanding existing sources of emission and discovering new sources, such as the Fermi Bubbles and the GeV excess towards the center of the Milky Way. However, existing models still yield formally poor fits to the data with significant remaining residuals, which makes quantitative comparisons between different models...
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Fabio Zandanel (University of Amsterdam)17/10/2017, 13:00
Clusters of galaxies should host a significant amount of relativistic cosmic-ray protons accelerated by structure formation shocks during their assembly history, and re-accelerated by turbulence in merging clusters. The quest for the pion-decay emission from hadronic interaction of these relativistic protons with the ambient gas has so far been inconclusive. Nevertheless, gamma-ray...
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Esra Bulbul17/10/2017, 14:45
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Luke Drury (DIAS)17/10/2017, 15:30
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Prof. Stefan Funk (ECAP, Universität Erlangen)17/10/2017, 16:15
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Prof. John Beacom (Ohio State University)18/10/2017, 10:00
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Francis Halzen (University of Wisconsin)18/10/2017, 10:45
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Mauricio Bustamante (Niels Bohr Institute)18/10/2017, 12:00
Neutrino interactions, though feeble, are tremendously important in particle physics and astrophysics. Yet, at neutrino energies above 350 GeV there has been, up to now, no direct experimental information on neutrino interactions, only predictions. Now, we can measure the neutrino-nucleon cross section above 10 TeV, thanks to the recent discovery of high-energy astrophysical neutrinos by...
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Dr Fe Krauss18/10/2017, 12:15
The IceCube Collaboration has published results on a neutrino flux significantly in excess of the atmospheric background. Due to low atmospheric background at PeV energies, the highest energy events are the most likely ones to be of extraterrestrial origin. We use broadband spectra in the IceCube integration period to calculate the maximum expected number of neutrinos assuming a pion...
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Prof. Manuela Vecchi (São Institute of Physics)18/10/2017, 12:30
Two years ago, the AMS collaboration released the most precise measurement of the cosmic ray positron flux. It confirms that pure secondary predictions fall below the data above 10 GeV, suggesting the presence of a primary component, e.g. annihilations of WIMPs dark matter. Most analyses have focused on the high-energy part of the spectrum, disregarding the GeV energy region where cosmic ray...
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Mr Dimitrios Kantzas (University of Amsterdam)18/10/2017, 12:45
The dominant models that can describe the non - thermal radiation by high energy astrophysical objects, can be divided into two categories, i.e. the leptonic and the hadronic ones. The former one suggests that the high energy radiation is produced by physical processes associated with a population of highly relativistic electrons. On the other hand, the hadronic model assumes that the observed...
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Dr Salumbides Edcel (Vrije Universiteit Amsterdam)18/10/2017, 13:00
Molecular hydrogen has been identified as a search ground for physics beyond the Standard Model. This is complementary to searches motivated by high-energy and astroparticle physics, as we search for subtle effects at the low-energy scale in the spectra of simple molecules. The quantum level structure of the hydrogen molecule can now be calculated to very high precision. These theoretical...
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Prof. Antonio Capone18/10/2017, 13:15
ANTARES, the deep-underwater Cherenkov neutrino telescope in the Northern hemisphere, has been taking data continuously since 2007. Its primary goal is the search for astrophysical neutrinos in the TeV-PeV range. After the discovery of a cosmic neutrino diffuse flux by the IceCube telescope, ANTARES has searched for neutrino sources in the Southern Sky at TeV energies and set constraints on...
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