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833 papers · 1 filter

astro-ph.IM2020★ 21 cited

Two Year Cosmology Large Angular Scale Surveyor (CLASS) Observations: Long Timescale Stability Achieved with a Front-End Variable-delay Polarization Modulator at 40 GHz

Kathleen Harrington, Rahul Datta, Keisuke Osumi +33

The Cosmology Large Angular Scale Surveyor (CLASS) is a four-telescope array observing the largest angular scales () of the cosmic microwave backgroun…

math.AP2020★ 11 cited

Global well-posedness for the cubic nonlinear Schr{ö}dinger equation with initial lying in -based Sobolev spaces

Benjamin Dodson, Avraham Soffer, Thomas Spencer

In this paper we continue our study [DSS20] of the nonlinear Schrödinger equation (NLS) with bounded initial data which do not vanish at infinity. Local well-posedness on $\mathbb{…

cs.LG2020

Assured RL: Reinforcement Learning with Almost Sure Constraints

Agustin Castellano, Juan Bazerque, Enrique Mallada

We consider the problem of finding optimal policies for a Markov Decision Process with almost sure constraints on state transitions and action triplets. We define value and action-…

astro-ph.GA2020★ 22 cited

First Co-spatial Comparison of Stellar, Neutral-, and Ionized-gas Metallicities in a metal-rich galaxy: M83

Svea Hernandez, Alessandra Aloisi, Bethan L. James +14

We carry out a comparative analysis of the metallicities from the stellar, neutral-gas, and ionized-gas components in the metal-rich spiral galaxy M83. We analyze spectroscopic obs…

cond-mat.str-el2020★ 12 cited

Separated transport relaxation scales and interband scattering in SrRuO, CaRuO, and SrRuO thin films

Youcheng Wang, H. P. Nair, N. J. Schreiber +5

The anomalous charge transport observed in some strongly correlated metals raises questions as to the universal applicability of Landau Fermi liquid theory. The coherence temperatu…

nlin.AO2020★ 2 cited

Learning emergent PDEs in a learned emergent space

Felix P. Kemeth, Tom Bertalan, Thomas Thiem +4

We extract data-driven, intrinsic spatial coordinates from observations of the dynamics of large systems of coupled heterogeneous agents. These coordinates then serve as an emergen…

stat.ML2020★ 2 cited

Partial Identifiability in Discrete Data With Measurement Error

Noam Finkelstein, Roy Adams, Suchi Saria +1

When data contains measurement errors, it is necessary to make assumptions relating the observed, erroneous data to the unobserved true phenomena of interest. These assumptions sho…

eess.AS2020★ 1 cited

End-to-End Speaker Diarization as Post-Processing

Shota Horiguchi, Paola Garcia, Yusuke Fujita +2

This paper investigates the utilization of an end-to-end diarization model as post-processing of conventional clustering-based diarization. Clustering-based diarization methods par…

math.OC2020

Learning Lyapunov Functions for Hybrid Systems

Shaoru Chen, Mahyar Fazlyab, Manfred Morari +2

We propose a sampling-based approach to learn Lyapunov functions for a class of discrete-time autonomous hybrid systems that admit a mixed-integer representation. Such systems incl…

physics.comp-ph2020★ 62 cited

PArallel, Robust, Interface Simulator (PARIS)

W. Aniszewski, T. Arrufat, M. Crialesi-Esposito +10

Paris (PArallel, Robust, Interface Simulator) is a finite volume code for simulations of immiscible multifluid or multiphase flows. It is based on the "one-fluid" formulation of th…

astro-ph.HE2020★ 37 cited

Searches after Gravitational Waves Using ARizona Observatories (SAGUARO): Observations and Analysis from Advanced LIGO/Virgo's Third Observing Run

K. Paterson, M. J. Lundquist, J. C. Rastinejad +34

With the conclusion of the third observing run for Advanced LIGO/Virgo (O3), we present a detailed analysis of both triggered and serendipitous observations of 17 gravitational wav…

hep-ph2020★ 55 cited

Dark Energy Radiation

Kim V. Berghaus, Peter W. Graham, David E. Kaplan +2

We show that if dark energy evolves in time, its dynamical component could be dominated by a bath of dark radiation. Within current constraints this radiation could have up to $\si…

astro-ph.GA2020★ 3 cited

Dorado and its member galaxies II. A UVIT picture of the NGC 1533 substructure

R. Rampazzo, P. Mazzei, A. Marino +8

Dorado is a nearby (17.69 Mpc) strongly evolving galaxy group in the Southern Hemisphere. We are investigating the star formation in this group. This paper provides a FUV imaging o…

astro-ph.SR2020★ 39 cited

Luminous Red Nova AT 2019zhd, a new merger in M 31

A. Pastorello, M. Fraser, G. Valerin +20

We present the follow-up campaign of the luminous red nova (LRN) AT~2019zhd, the third event of this class observed in M 31. The object was followed by several sky surveys for abou…

cs.CV2020★ 3 cited

SAFCAR: Structured Attention Fusion for Compositional Action Recognition

Tae Soo Kim, Gregory D. Hager

We present a general framework for compositional action recognition -- i.e. action recognition where the labels are composed out of simpler components such as subjects, atomic-acti…

astro-ph.HE2020★ 5 cited

Neutron stars as probes of dark matter

M. Ángeles Pérez-García, J. Silk

Neutron Stars (NSs) are compact stellar objects that are stable solutions in General Relativity. Their internal structure is usually described using an equation of state that invol…

q-bio.OT2020★ 1 cited

Neuromatch Academy: Teaching Computational Neuroscience with global accessibility

Tara van Viegen, Athena Akrami, Kate Bonnen +32

Neuromatch Academy designed and ran a fully online 3-week Computational Neuroscience summer school for 1757 students with 191 teaching assistants working in virtual inverted (or fl…

astro-ph.IM2020★ 4 cited

Control and systems software for the Cosmology Large Angular Scale Surveyor (CLASS)

Matthew A. Petroff, John W. Appel, Charles L. Bennett +16

The Cosmology Large Angular Scale Surveyor (CLASS) is an array of polarization-sensitive millimeter wave telescopes that observes ~70% of the sky at frequency bands centered near 4…

astro-ph.IM2020★ 12 cited

DiskFM: A Forward Modeling Tool for Disk Analysis with Coronagraphic Instruments

Johan Mazoyer, Pauline Arriaga, Justin Hom +6

Because of bright starlight leakage in coronagraphic raw images, faint astrophysical objects such as exoplanets can only be detected using powerful point spread function (PSF) subt…

astro-ph.CO2020★ 8 cited

Understanding Type Ia Supernova Distance Biases by Simulating Spectral Variations

J. D. R. Pierel, D. O. Jones, M. Dai +7

In the next decade, transient searches from the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope will increase the sample of known Type Ia Supernovae (SN Ia) fro…

cond-mat.mes-hall2020★ 1 cited

Robust Flat Bands with Tunable Energies in Honeycomb Superlattices

Zihao Qi, Eric Bobrow, Yi Li

Flat bands in lattice models have provided useful platforms for studying strong correlation and topological physics. Recently, honeycomb superlattices have been shown to host flat…

cond-mat.str-el2020★ 10 cited

Non-collinear ground state from a four-spin chiral exchange in a tetrahedral magnet

I. A. Ado, O. Tchernyshyov, M. Titov

We propose a quartic chiral term for the energy density of a cubic ferromagnet with broken parity symmetry (point group ). We demonstrate…

astro-ph.GA2020★ 3 cited

Discovery of a damped Ly galaxy at z 3 towards the quasar SDSS J011852+040644

Ravi Joshi, Michele Fumagalli, Raghunathan Srianand +11

We report the detection of the host galaxy of a damped Ly system (DLA) with log N(HI) = at towards the background quasar SDSS…

astro-ph.HE2020★ 8 cited

Fast radio burst repeaters produced via Kozai-Lidov feeding of neutron stars in binary systems

Valentin Decoene, Kumiko Kotera, Joseph Silk

Neutron stars are likely surrounded by gas, debris, and asteroid belts. Kozai-Lidov perturbations, induced by a distant, but gravitationally bound companion, can trigger the infall…