Detection of Cosmic Structures using the Bispectrum Phase. II. First Results from Application to Cosmic Reionization Using the Hydrogen Epoch of Reionization Array

Posted by klaurent MIT

Kavli Affiliate: Jacqueline N. Hewitt | First 5 Authors: Nithyanandan Thyagarajan, Chris L. Carilli, Bojan Nikolic, James Kent, Andrei Mesinger | Summary: Characterizing the epoch of reionization (EoR) at $zgtrsim 6$ via the redshifted 21 cm line of neutral Hydrogen (HI) is critical to modern astrophysics and cosmology, and thus a key science goal of […]


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Core collapse in massive scalar-tensor gravity

Posted by klaurent Cambridge

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Roxana Rosca-Mead, Ulrich Sperhake, Christopher J. Moore, Michalis Agathos, Davide Gerosa | Summary: This paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [Phys. Rev. Lett. {bf 119}, 201103]. We systematically explore the parameter space that characterizes […]


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Symbolic Pregression: Discovering Physical Laws from Distorted Video

Posted by klaurent MIT

Kavli Affiliate: Max Tegmark | First 5 Authors: Silviu-Marian Udrescu, Max Tegmark, , , | Summary: We present a method for unsupervised learning of equations of motion for objects in raw and optionally distorted unlabeled video. We first train an autoencoder that maps each video frame into a low-dimensional latent space where the laws of […]


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A GPU Spatial Processing System for CHIME

Posted by klaurent MIT

Kavli Affiliate: Kiyoshi Masui | First 5 Authors: Nolan Denman, Andre Renard, Keith Vanderlinde, Philippe Berger, Kiyoshi Masui | Summary: We present an overview of the Graphics Processing Unit (GPU) based spatial processing system created for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). The design employs AMD S9300x2 GPUs and readily-available commercial hardware in its […]


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Orbital Modulation of Gamma Rays from PSR~J2339$-$0533

Posted by klaurent Stanford

Kavli Affiliate: Roger W. Romani | First 5 Authors: Hongjun An, Roger W. Romani, Matthew Kerr, , | Summary: We report on orbital modulation of the 100-600 MeV gamma-ray emission of the $P_{rm B}=4.6$ hr millisecond pulsar binary PSR J2339$-$0533 using 11 yr of Fermi Large Area Telescope data. The modulation has high significance (chance […]


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The Noise of Gravitons

Posted by klaurent MIT

Kavli Affiliate: Frank Wilczek | First 5 Authors: Maulik Parikh, Frank Wilczek, George Zahariade, , | Summary: We show that when the gravitational field is treated quantum-mechanically, it induces fluctuations — noise — in the lengths of the arms of gravitational wave detectors. The characteristics of the noise depend on the quantum state of the […]


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TESS Data for Asteroseismology: Timing verification

Posted by klaurent MIT

Kavli Affiliate: Edward H. Morgan | First 5 Authors: Carolina von Essen, Mikkel N. Lund, Rasmus Handberg, Marina S. Sosa, Julie Thiim Gadeberg | Summary: The Transiting Exoplanet Survey Satellite (TESS) is NASA’s latest space telescope dedicated to the discovery of transiting exoplanets around nearby stars. Besides the main goal of the mission, asteroseismology is […]


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Muons in supernovae: implications for the axion-muon coupling

Posted by klaurent Stanford

Kavli Affiliate: Peter W. Graham | First 5 Authors: Robert Bollig, William DeRocco, Peter W. Graham, Hans-Thomas Janka, | Summary: The high temperature and electron degeneracy attained during a supernova allow for the formation of a large muon abundance within the core of the resulting proto-neutron star. If new pseudoscalar degrees of freedom have large […]


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Rozansky-Witten geometry of Coulomb branches and logarithmic knot invariants

Posted by klaurent Tokyo

Kavli Affiliate: Hiraku Nakajima | First 5 Authors: Sergei Gukov, Po-Shen Hsin, Hiraku Nakajima, Sunghyuk Park, Du Pei | Summary: By studying Rozansky-Witten theory with non-compact target spaces we find new connections with knot invariants whose physical interpretation was not known. This opens up several new avenues, which include a new formulation of $q$-series invariants […]


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The Cosmological Bootstrap: Spinning Correlators from Symmetries and Factorization

Posted by klaurent Chicago

Kavli Affiliate: Austin Joyce | First 5 Authors: Daniel Baumann, Carlos Duaso Pueyo, Austin Joyce, Hayden Lee, Guilherme L. Pimentel | Summary: We extend the cosmological bootstrap to correlators involving massless particles with spin. In de Sitter space, these correlators are constrained both by symmetries and by locality. In particular, the de Sitter isometries become […]


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