Conveners
Astroparticles & CMB
- Lindsey Bleem (Argonne National Laboratory)
- Kerstin Perez (MIT)
- Laura Newburgh
Astroparticles & CMB
- Laura Newburgh
- Kerstin Perez (MIT)
- Lindsey Bleem (Argonne National Laboratory)
Astroparticles & CMB
- Kerstin Perez (MIT)
- Laura Newburgh
- Lindsey Bleem (Argonne National Laboratory)
Astroparticles & CMB
- Kerstin Perez (MIT)
- Laura Newburgh
- Lindsey Bleem (Argonne National Laboratory)
The Simons Array (SA) experiment is a set of three millimeter-wave telescopes designed for polarimetry, including measurements of the polarization of the cosmic microwave background (CMB) anisotropies, from an altitude of 5200 m in the Atacama Desert in Chile. Each of the three telescopes features a receiver with sufficient stability to study large angular scales, sufficient resolution to...
Theories of inflation generically predict the existence of primordial gravitational waves over a wide range of amplitudes. Currently the most promising pathway for constraining inflationary gravitational waves is to search for the imprint these tensor perturbations would leave on the cosmic microwave background (CMB) as a B-mode polarization pattern. The BICEP/Keck experiments target this...
SPT-3G is a third generation camera for the 10-meter diameter South Pole Telescope (SPT), which is designed to measure the cosmic microwave background (CMB). SPT-3G began a 6-year 1500 square degree survey in February 2018, which will produce measurements of CMB temperature and polarization anisotropies with an unprecedented combination of angular resolution and sensitivity. These...
Even though the standard model of cosmology predicts a statistically isotropic (SI) CMB sky, the SI violation signals are always present in an observed sky-map. Given a completely statistically isotropic CMB, different cosmological artifacts, measurement effects and unavoidable effects during data analysis etc. may lead to isotropy violation signals in an otherwise SI sky. Therefore, a proper...
The abundance of massive galaxy clusters is a powerful cosmological probe as it depends sensitively upon both the expansion history of the universe and the growth of density fluctuations. To derive precision constraints with these systems a large and well-characterized sample of clusters is required. To produce such a sample, the 10-m South Pole Telescope has been used to conduct...
Next-generation probes of the cosmic microwave background will detect tens-to-hundreds of thousands of galaxy clusters through the Sunyaez-Zeldovich effect, providing a measurement of large-scale structure which offers new constraints on cosmology and fundamental physics. An often-used statistic for Sunyaev-Zeldovich cluster constraints is their abundance as a function of redshift, but as the...
Millisecond pulsars (MSPs) are old, rapidly rotating neutron stars that have been detected in multiple wavelengths, including gamma rays. A population of faint MSPs in the Galactic bulge could potentially explain the mysterious GeV excess found in the Fermi Large Area Telescope data. If MSPs are responsible for the excess, their leptonic injections ($e^\pm$) could produce detectable...
Precision measurements of cosmic ray positrons and electrons are presented based on 1.9 million positrons and 28.1 million electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron flux exhibits complex energy dependence with a sharp drop-off above 284 GeV. In the entire energy range the positron flux is well described by the sum of a term...
The fluxes and flux ratios of charged elementary particles in cosmic rays are presented in the absolute rigidity range from 1 up to 2000 GV. In the absolute rigidity range ∼60 to ∼500 GV, the antiproton, proton, and positron fluxes are found to have nearly identical rigidity dependence and the electron flux exhibits different rigidity dependence. Below 60 GV, the antiproton-to-proton,...
Properties of cosmic-ray primary nuclei from Z=1 to Z=16 measured by Alpha M magnetic spectrometer on ISS will be presented
Properties of secondary cosmic rays measured by Alpha Magnetic Spectrometer on ISS will be presented
The properties of cosmic ray isotopes of H, He and Li, measured by AMS will be presented.
Analysis of anisotropy of the arrival directions of galactic protons, electrons and positrons has been performed with the Alpha Magnetic Spectrometer on the International Space Station. These results allow to differentiate between point-like and diffuse sources of cosmic rays for the explanation of the observed excess of high energy positrons. The AMS results on the dipole anisotropy are...
We present high-statistics, precision measurements by AMS of the detailed time and rigidity dependence of the primary cosmic-ray electron, positron, proton and helium fluxes over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. We...
