The Gravitational Afterglow of Boson Stars

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Robin Croft, Thomas Helfer, Bo-Xuan Ge, Miren Radia, Tamara Evstafyeva | Summary: In this work we study the long-lived post-merger gravitational wave signature of a boson-star binary coalescence. We use full numerical relativity to simulate the post-merger and track the gravitational afterglow over an extended period of […]


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Characterization of JWST science performance from commissioning

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Jane Rigby, Marshall Perrin, Michael McElwain, Randy Kimble, Scott Friedman | Summary: This document characterizes the actual science performance of the James Webb Space Telescope (JWST), as known on 12 July 2022. Following six months of commissioning to prepare JWST for science operations, the observatory is now […]


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IXPE Observations of the Crab Pulsar and Nebula

Kavli Affiliate: Nicola Omodei | First 5 Authors: Niccolò Bucciantini, Riccardo Ferrazzoli, Matteo Bachetti, John Rankin, Niccolò Di Lalla | Summary: The Crab pulsar and its nebula are among the most studied astrophysical systems, and constitute one of the most promising environments where high energy processes and particle acceleration can be investigated. They are the […]


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Simultaneous space and phase resolved X-ray polarimetry of the Crab Pulsar and Nebula

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Niccolò Bucciantini, Riccardo Ferrazzoli, Matteo Bachetti, John Rankin, Niccolò Di Lalla | Summary: The Crab pulsar and its nebula are among the most studied astrophysical systems, and constitute one of the most promising environments where high energy processes and particle acceleration can be investigated. They are […]


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Bi-fidelity Evolutionary Multiobjective Search for Adversarially Robust Deep Neural Architectures

Kavli Affiliate: Jia Liu | First 5 Authors: Jia Liu, Ran Cheng, Yaochu Jin, , | Summary: Deep neural networks have been found vulnerable to adversarial attacks, thus raising potentially concerns in security-sensitive contexts. To address this problem, recent research has investigated the adversarial robustness of deep neural networks from the architectural point of view. […]


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PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star

Kavli Affiliate: Roger W. Romani | First 5 Authors: Roger W. Romani, D. Kandel, Alexei V. Filippenko, Thomas G. Brink, WeiKang Zheng | Summary: We describe Keck-telescope spectrophotometry and imaging of the companion of the “black widow" pulsar PSR~J0952$-$0607, the fastest known spinning neutron star (NS) in the disk of the Milky Way. The companion […]


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Modeling the Lyman-$α$ forest with Eulerian and SPH hydrodynamical methods

Kavli Affiliate: Salman Habib | First 5 Authors: Solène Chabanier, J. D. Emberson, Zarija Lukić, Jesus Pulido, Salman Habib | Summary: We compare two state-of-the-art numerical codes to study the overall accuracy in modeling the intergalactic medium and reproducing Lyman-$alpha$ forest observables for DESI and high-resolution data sets. The codes employ different approaches to solving […]


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A physical model for the UV/optical power spectra of AGN

Kavli Affiliate: Erin Kara | First 5 Authors: Christos Panagiotou, Iossif Papadakis, Erin Kara, Elias Kammoun, Michal Dovčiak | Summary: The UV/optical variability of AGN has long been thought to be driven by the X-ray illumination of the accretion disk. However, recent multi-wavelength campaigns of nearby Seyfert galaxies seem to challenge this paradigm, with an […]


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B-mode constraints from Planck low multipole polarisation data

Kavli Affiliate: George Efstathiou | First 5 Authors: Roger de Belsunce, Steven Gratton, George Efstathiou, , | Summary: We present constraints on primordial B modes from large angular scale cosmic microwave background polarisation anisotropies measured with the Planck satellite. To remove Galactic polarised foregrounds, we use a Bayesian parametric component separation method, modelling synchrotron radiation […]


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