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Dr Luigi Tibaldo (KIPAC-SLAC, Stanford University)15/08/2013, 09:10Cosmic Frontieroral presentationCosmic rays are a probe of the most energetic processes in the Universe and may encode signatures of dark-matter particles annihilation or decay. The Large Area Telescope on board the Fermi Gamma-ray Space Telescope indirectly traces cosmic rays throughout the Galaxy thanks to the diffuse gamma-ray emission produced by inelastic collisions of cosmic-ray nuclei with interstellar gas and by...Go to contribution page
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Alex Drlica-Wagner (Stanford Universty)15/08/2013, 09:34Cosmic Frontieroral presentationThe dwarf spheroidal satellite galaxies of the Milky Way are some of the most dark-matter-dominated objects observed. Their proximity, high dark matter content, and lack of astrophysical backgrounds make them one of the most promising targets for the indirect detection of dark matter via gamma rays. Here we report on gamma-ray observations of 25 Milky Way dwarf spheroidal satellite galaxies...Go to contribution page
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David Williams (UC Santa Cruz)15/08/2013, 10:30Cosmic Frontieroral presentationThe Cherenkov Telescope Array (CTA) will be a new observatory for the study of very high energy (VHE) gamma-ray sources. It is designed to achieve an order of magnitude improvement in sensitivity in the ~30 GeV to ~100 TeV energy band compared to currently operating instruments (VERITAS, MAGIC, HESS). The design and capabilities of CTA will be described. The presentation focuses on how CTA...Go to contribution page
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Dr Matthew Wood (SLAC)15/08/2013, 10:54Cosmic Frontieroral presentationA leading candidate for astrophysical dark matter (DM) is a weakly interacting particle with a mass in the range from 10 GeV to 10 TeV. The pair annihilation of DM in environments with high DM density such as in the cores of galaxies could produce gamma-ray signals detectable with space- or ground-based gamma-ray observatories. The Cherenkov Telescope Array (CTA) is a future ground-based...Go to contribution page
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Dr Andrew Smith (University of Utah Physics and Astronomy)15/08/2013, 11:18Cosmic Frontieroral presentationIn the cosmological paradigm, cold dark matter (DM) dominates the mass content of the Universe and is present at every scale. Candidates for DM include many extensions of the standard model, with a weakly interacting massive particle (WIMP) in the mass range from 50 GeV to greater than 10 TeV. The self-annihilation of WIMPs in astrophysical regions of high DM density can produce secondary...Go to contribution page
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Prof. Reshmi Mukherjee Mukherjee (Barnard College)15/08/2013, 11:42Cosmic Frontieroral presentationRelativistic jets are extremely powerful outflows of collimated plasma that may be seen in active galactic nuclei (AGN), gamma-ray bursts, and X-ray binaries. AGN are believed to be powered by the accretion of matter onto a super-massive black hole (SMBH). The observed similarities (in morphology and spectrum) of jets from black holes of different masses suggests that they share a common...Go to contribution page
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Dr William Shepherd (UC Santa cruz)15/08/2013, 13:30Cosmic Frontieroral presentationI will present a calculation of the thermal decoupling temperature and implied dark matter halo mass distribution cutoff within the framework of effective theories of dark matter. For the first time, this calculation has been considered for all interactions which respect parity, whether the dark matter couples dominantly to leptons, quarks, or both, and including the relevant couplings to...Go to contribution page
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Storm Emma (UC Santa Cruz)15/08/2013, 13:54Cosmic Frontieroral presentationAnnihilation of dark matter can result in the production of stable Standard Model particles including electrons and positrons that, in the presence of magnetic fields, lose energy via synchrotron radiation, observable as radio emission. Galaxy clusters are excellent targets to search for or to constrain the rate of dark matter annihilation, as they are both massive and dark matter dominated....Go to contribution page
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Ahmed Ismail (SLAC)15/08/2013, 14:18Cosmic Frontieroral presentationThe search for and identification of neutralino dark matter in supersymmetry requires a multi-pronged approach with important roles played by collider, direct and indirect dark matter detection experiments. We summarize the sensitivity of such searches at the LHC, combined with those by Fermi, CTA, IceCube/DeepCore, COUPP and XENON1T, to such particles within the context of the 19-parameter...Go to contribution page
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Dr Farinaldo Queiroz (University of California Santa Cruz)15/08/2013, 14:42Cosmic Frontieroral presentationThe Planck and WMAP9 satellites, as well as the ATACAMA and South Pole telescopes, have recently presented results on the angular power spectrum of the comic microwave background. Data tentatively point to the existence of an extra radiation component in the early universe. Here, we show that this extra component can be mimicked by dark matter particles whose majority is cold, but with a small...Go to contribution page
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Kazuyoshi KITAZAWA (RISP Japan)15/08/2013, 15:06Cosmic Frontieroral presentationA long time behavior of the candidate for dark energy which satisfies the latest result of WMAP (9 Years: ฮฉฮ=0.721ยฑ0.025) and is considered as one of the degenerates 1) of ur-Higgs boson which has appeared as a mother for SM Higgs boson 2), is studied. It is shown that such a dark energy of almost non-mass fullerene will disrupt gradually into smaller ones consist of several ฯ mesons by...Go to contribution page
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Prof. Priscilla Cushman (University of Minnesota)15/08/2013, 16:00Cosmic Frontieroral presentationThe Cryogenic Dark Matter Search is sensitive to WIMP interactions with target nuclei in germanium and silicon crystals held at ~50 mK. Detailed information contained in both phonon and ionization signals are used to create a WIMP-search region with backgrounds of less than one event. Raw data taken with the CDMS-II detectors was reprocessed with a pulse reconstruction algorithm which...Go to contribution page
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Ms Monica Pangilinan (Brown University)15/08/2013, 16:35Cosmic Frontieroral presentationThe fundamental nature of dark matter is one of the key open questions that is currently being probed at underground sites worldwide. The LZ experiment is a next generation liquid Xenon detector that will continue this search, building upon the expertise and experience provided by the LUX experiment. The proposed LZ detector will be a 7-ton liquid Xe TPC that will use the current...Go to contribution page
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Prof. Nepomuk Otte (Georgia Institute of Technology)16/08/2013, 08:45Cosmic Frontieroral presentationSpecial and general relativity extended our understanding of the concepts of space and time, two of the most basic topics of investigation of modern physics. However, quantum theory has shown that there is more to learn regarding these concepts. Considerations of how to combine the concepts of quantum mechanics and gravity (quantum gravity) indicate that the Planck scale is a ``natural...Go to contribution page
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Peter Karn (UC Irvine)16/08/2013, 09:09Cosmic Frontieroral presentationThe High Altitude Water Cherenkov (HAWC) Observatory is a gamma-ray experiment currently under construction at Sierra Negra in Mexico. When complete it will consist of a 22,000 square meter array of 300 water Cherenkov detectors. Although HAWC is designed to study gamma rays from galactic and extra-galactic sources, the large volume of instrumented water (each tank holds ~188,000 liters) gives...Go to contribution page
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Dr Tareq AbuZayyad (University of Utah)16/08/2013, 09:33Cosmic Frontieroral presentationThe Telescope Array Low-Energy Extension (TALE) is a hybrid, Air Fluorescence Detector (FD) / Scintillator Array, designed to study cosmic ray initiated showers at energies above ~3x10^16 eV. Located in the western Utah desert, the TALE FD is comprised of 10 telescopes which cover the elevation range 31-58 deg in addition to 14 telescopes with elevation coverage of 3-31 deg. As with all...Go to contribution page
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Dr Beth Reid (Lawrence Berkeley National Laboratory)16/08/2013, 10:30Cosmic Frontieroral presentationThe SDSS-III Baryon Oscillation Spectroscopic Survey, now 90% complete, is measuring the three-dimensional cosmic structure with 1.35 million new redshifts. Galaxy clustering measurements provide constraints on the cosmic expansion history through the baryon acoustic oscillation feature. In addition, the imprint of galaxy peculiar velocities on the observed galaxy clustering, "redshift-space...Go to contribution page
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Mariana Vargas-Magana (Carnegie Mellon University)16/08/2013, 10:54Cosmic Frontieroral presentationThe dominant effect of the nonlinear evolution of the density field is the smoothing of the Baryonic Acoustic Oscillation (BAO) feature, the standard reconstruction technique has shown to reverse this smoothing recovering the linear density field. The standard reconstruction technique has been tested with simulations and very recently, it has been applied to SDSS galaxy data enabling a...Go to contribution page
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Michael Levi (LBNL)16/08/2013, 11:18Cosmic Frontieroral presentationThe mid-scale dark energy spectroscopic instrument (MS-DESI) is currently in conceptual design. MS-DESI will be an exceptionally powerful facility for the Cosmic Frontier research program, mapping the Universe in three dimensions by massively parallel measurements of galaxy redshifts. The experiment will be on sky by 2018 to study dark energy as a Stage-IV project exploiting the baryon...Go to contribution page
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Mr Carlos Cunha (Stanford University)16/08/2013, 14:30Cosmic Frontieroral presentationThe Nobel Prize in Physics for 2011 was awarded for the discovery that the expansion of the Universe is accelerating. Yet the physical origin of cosmic acceleration remains a mystery. The Dark Energy Survey (DES) aims to address the questions: why is the expansion speeding up? Is cosmic acceleration due to dark energy or does it require a modification of General Relativity? If dark...Go to contribution page
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Prof. Klaus Honscheid (Ohio State University)16/08/2013, 14:54Cosmic Frontieroral presentationStarting this September the Dark Energy Survey collaboration will use 525 nights over five years with the Blanco 4-m telescope at CTIO to image 5000 square degrees of the sky in five optical filter bands. The primary science goal is to understand the properties of dark energy using four complementary techniques: galaxy cluster counts, weak lensing, angular power spectrum and type Ia...Go to contribution page
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Prof. Klaus Honscheid (Ohio State University)16/08/2013, 15:18Cosmic Frontieroral presentationDuring fall 2012 the Dark Energy Survey (DES) collaboration installed and commissioned DECam, a 570 mega-pixel optical and near-infrared camera with a large 3 sq. deg. field of view, set at the prime focus of the 4-meter Blanco telescope in CTIO, Chile. In the course of the next five years DECam will map an entire octant of the southern sky to unprecedented depth, measuring the position on the...Go to contribution page
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Dr Marcelle Soares-Santos (Fermilab)16/08/2013, 15:54Cosmic Frontieroral presentationGalaxy clusters are one of the four key cosmic acceleration probes used by the Dark Energy Survey (DES) to measure cosmological parameters with unprecedented precision. DES has recently completed commissioning of its instrument and accomplished a successful science verification data taking phase. The survey proper will soon begin. In this talk, I review the motivation for using clusters of...Go to contribution page
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Prof. Klaus Honscheid (Ohio State University)16/08/2013, 16:18Cosmic Frontieroral presentationDECam is the newly commissioned imager of the Dark Energy Survey (DES)with a very large Field-of-View (FoV) of more than 3 square degrees. During the DES science verification phase, we targeted four massive galaxy clusters visible from CTIO to measure their weak-lensing effect. We will present some of the first science-quality images from DECam and present the photometry and shape analysis...Go to contribution page
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Kyle Barbary (ANL)16/08/2013, 16:42Cosmic Frontieroral presentationThe Dark Energy Survey (DES) is a five-year astronomical survey, starting in Fall 2013. DES is specifically designed to study dark energy, using a new 570-megapixel digital imager, the Dark Energy Camera, mounted on the Blanco 4-meter telescope at CTIO in Chile. It will do this using four major complimentary dark energy probes, one of which is Type Ia supernovae. As part of DES, a...Go to contribution page
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Prof. Klaus Honscheid (Ohio State University)16/08/2013, 17:06Cosmic Frontieroral presentationWeak lensing measurements are expected to be powerful probes of the physics of the dark sector. While the shear component of the lensing distortion has been detected and analyzed in several studies to date, the magnification component has received relatively little attention. We will show how an understanding of galaxy-scale physics can be used to dramatically improve both the systematic and...Go to contribution page
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