Astrophysics – Page 313 – Kavli Institute Pre-Print Publications

A measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel’dovich effect with SPT-3G and DES

Posted by July 25, 2022Stanford

Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: E. Schiappucci, F. Bianchini, M. Aguena, M. Archipley, L. Balkenhol | Summary: We infer the mean optical depth of a sample of optically-selected galaxy clusters from the Dark Energy Survey (DES) via the pairwise kinematic Sunyaev-Zel’dovich (kSZ) effect. The pairwise kSZ signal between pairs of clusters drawn […]

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Highly non-Gaussian tails and primordial black holes from single-field inflation

Posted by klaurent July 25, 2022Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Yi-Fu Cai, Xiao-Han Ma, Misao Sasaki, Dong-Gang Wang, Zihan Zhou | Summary: For primordial perturbations, deviations from Gaussian statistics on the tail of the probability distribution can be associated with non-perturbative effects of inflation. In this paper, we present some particular examples in which the tail of […]

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Relative baryon-dark matter velocities in cosmological zoom simulations

Posted by klaurent July 23, 2022Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Luke Conaboy, Ilian T. Iliev, Anastasia Fialkov, Keri L. Dixon, David Sullivan | Summary: Supersonic relative motion between baryons and dark matter due to the decoupling of baryons from the primordial plasma after recombination affects the growth of the first small-scale structures. Large box sizes (greater than […]

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Relative baryon-dark matter velocities in cosmological zoom simulations

Posted by klaurent July 23, 2022Cambridge

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Marginal Bayesian Statistics Using Masked Autoregressive Flows and Kernel Density Estimators with Examples in Cosmology

Posted by klaurent July 23, 2022Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Harry Bevins, Will Handley, Pablo Lemos, Peter Sims, Eloy de Lera Acedo | Summary: Cosmological experiments often employ Bayesian workflows to derive constraints on cosmological and astrophysical parameters from their data. It has been shown that these constraints can be combined across different probes such as Planck […]

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Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B to J/ψK$ decays at Belle II

Posted by klaurent Tokyo

Kavli Affiliate: T. Higuchi | First 5 Authors: Belle II Collaboration, F. Abudinén, I. Adachi, R. Adak, K. Adamczyk | Summary: We report a study of $B to J/psi(ell^{+}ell^{-})K$ decays, where $ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at […]

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Two-Stage Fine-Tuning: A Novel Strategy for Learning Class-Imbalanced Data

Posted by klaurent July 22, 2022Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Taha ValizadehAslani, Yiwen Shi, Jing Wang, Ping Ren, Yi Zhang | Summary: Classification on long-tailed distributed data is a challenging problem, which suffers from serious class-imbalance and hence poor performance on tail classes with only a few samples. Owing to this paucity of samples, learning on the […]

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Long-duration Gamma-ray Burst and Associated Kilonova Emission from Fast-spinning Black Hole–Neutron Star Mergers

Posted by klaurent July 21, 2022Peking

Kavli Affiliate: Zhuo Li | First 5 Authors: Jin-Ping Zhu, Xiangyu Ivy Wang, Hui Sun, Yuan-Pei Yang, Zhuo Li | Summary: Here we collect three unique bursts, GRBs,060614, 211211A and 211227A, all characterized by a long-duration main emission (ME) phase and a rebrightening extended emission (EE) phase, to study their observed properties and the potential […]

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Optical design concept of the CMB-S4 large-aperture telescopes and cameras

Posted by July 20, 2022Chicago

Kavli Affiliate: Bradford Benson | First 5 Authors: Patricio A. Gallardo, Bradford Benson, John Carlstrom, Simon R. Dicker, Nick Emerson | Summary: CMB-S4 — the next-generation ground-based cosmic microwave background (CMB) experiment – will significantly advance the sensitivity of CMB measurements and improve our understanding of the origin and evolution of the universe. CMB-S4 will […]

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Optical design concept of the CMB-S4 large-aperture telescopes and cameras

Posted by klaurent July 20, 2022Cambridge

Kavli Affiliate: Richard Hills | First 5 Authors: Patricio A. Gallardo, Bradford Benson, John Carlstrom, Simon R. Dicker, Nick Emerson | Summary: CMB-S4 — the next-generation ground-based cosmic microwave background (CMB) experiment – will significantly advance the sensitivity of CMB measurements and improve our understanding of the origin and evolution of the universe. CMB-S4 will […]

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