Emulation of the Cosmic Dawn 21-cm Power Spectrum and Classification of Excess Radio Models Using an Artificial Neural Network

Posted by dbos Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Sudipta Sikder, Rennan Barkana, Itamar Reis, Anastasia Fialkov, | Summary: The cosmic 21-cm line of hydrogen is expected to be measured in detail by the next generation of radio telescopes. The enormous dataset from future 21-cm surveys will revolutionize our understanding of early cosmic times. We present […]


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The GALPROP Cosmic-ray Propagation and Non-thermal Emissions Framework: Release v57

Posted by dbos Stanford

Kavli Affiliate: Igor V. Moskalenko | First 5 Authors: Troy A. Porter, Gudlaugur Johannesson, Igor V. Moskalenko, , | Summary: The past decade has brought impressive advances in the astrophysics of cosmic rays (CRs) and multiwavelength astronomy, thanks to the new instrumentation launched into space and built on the ground. Modern technologies employed by those […]


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Next Generation Observatories — Report from the Dawn VI Workshop; October 5-7 2021

Posted by dbos MIT

Kavli Affiliate: Rainer Weiss | First 5 Authors: D. H. Shoemaker, Stefan Ballmer, Matteo Barsuglia, E. Berger, Emanuele Berti | Summary: The workshop Dawn VI: Next Generation Observatories took place online over three days, 5-7 October, 2021. More than 200 physicists and astronomers attended to contribute to, and learn from, a discussion of next-generation ground-based […]


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Primordial Black Hole Formation in Non-Minimal Curvaton Scenario

Posted by dbos Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Shi Pi, Misao Sasaki, , , | Summary: In the curvaton scenario, the curvature perturbation is generated after inflation at the curvaton decay, which may have a prominent non-Gaussian effect. For a model with a non-trivial kinetic term, an enhanced curvature perturbation on a small scale can […]


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A background-free optically levitated charge sensor

Posted by dbos Stanford

Kavli Affiliate: Giorgio Gratta | First 5 Authors: Nadav Priel, Alexander Fieguth, Charles P. Blakemore, Emmett Hough, Akio Kawasaki | Summary: Optically levitated macroscopic objects are a powerful tool in the field of force sensing, owing to high sensitivity, absolute force calibration, environmental isolation and the advanced degree of control over their dynamics that have […]


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Polarization spectrum of near infrared zodiacal light observed with CIBER

Posted by dbos Caltech

Kavli Affiliate: James J. Bock | First 5 Authors: Kohji Takimoto, Toshiaki Arai, Shuji Matsuura, James J. Bock, Asantha Cooray | Summary: We report the first measurement of the zodiacal light (ZL) polarization spectrum in the near-infrared between 0.8 and 1.8 $mu$m. Using the low-resolution spectrometer (LRS) on board the Cosmic Infrared Background Experiment (CIBER), […]


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Assistive Tele-op: Leveraging Transformers to Collect Robotic Task Demonstrations

Posted by dbos Harvard

Kavli Affiliate: Kevin Parker | First 5 Authors: Henry M. Clever, Ankur Handa, Hammad Mazhar, Kevin Parker, Omer Shapira | Summary: Sharing autonomy between robots and human operators could facilitate data collection of robotic task demonstrations to continuously improve learned models. Yet, the means to communicate intent and reason about the future are disparate between […]


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Neutral Gas within 20,000 Schwarzschild radii of Sagittarius A*

Posted by dbos Stanford

Kavli Affiliate: Roger D. Blandford | First 5 Authors: Elena M. Murchikova, Tianshu Wang, Brian Mason, Roger D. Blandford, | Summary: Murchikova et al 2019 discovered a disk of cool ionized gas within 20,000 Schwarzschild radii of the Milky Way’s Galactic Center black hole Sagittarius A*. They further demonstrated that the ionizing photon flux in […]


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Recent advances in branching problems of representations

Posted by dbos Tokyo

Kavli Affiliate: Toshiyuki Kobayashi | First 5 Authors: Toshiyuki Kobayashi, , , , | Summary: How does an irreducible representation of a group behave when restricted to a subgroup? This is part of branching problems, which are one of the fundamental problems in representation theory, and also interact naturally with other fields of mathematics. This […]


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Quantum states interrogation using a pre-shaped free electron wavefunction

Posted by dbos Caltech

Kavli Affiliate: Amnon Yariv | First 5 Authors: Bin Zhang, Du Ran, Reuven Ianconescu, Aharon Friedman, Jacob Scheuer | Summary: We present a comprehensive theory for interrogation of the quantum state of a two-level system (TLS) based on a free-electron – bound-electron resonant interaction scheme. The scheme is based on free electrons, whose quantum electron […]


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