United States Naval Research Laboratory

The First Multi-Messenger Nova: External Shocks, TeV Photons, and Neutrinos in the Next Eruption of T CrB

Abstract T Coronae Borealis is the most compelling anticipated Galactic recurrent nova and one of the best opportunities to test whether nova eruptions can become genuine multi-messenger transients. Recent observational work on classical novae has shown that the GeV γ-ray luminos...

Annealing SrTiO3 produces an iron-rich surface layer

SrTiO3 (STO) is among the most widely used substrates in complex oxide heterostructure research, yet the role of its trace impurity content in determining interface properties remains poorly understood. Here, we show that high-temperature annealing (the standard procedure for pre...

Generalized Nonlinear Bayesian Pulsar Timing with ENTERPRISE

Abstract We use the Bayesian methods in the ENTERPRISE package to examine the fully general parameterization of pulsar timing models in tandem with noise. We investigate four pulsars, PSRs J1600–3053, J2043+1711, J0740+6620, and J1640+2224, through the lens of Bayesian timing. We...

Multi‐year subsurface mixing properties and air–sea interaction in the Arabian Sea Warm Pool

Abstract Due to social and economic impacts on India and the surrounding countries, the Indian Summer Monsoon (ISM) has been at the forefront of a rich history of scientific discovery embedded in a broader scientific objective to understand the air–sea coupling, dynamics, and the...

Molecular Methods Reveal Responses of Bacterial Communities, Including Indicator Species, to Ballast Water Management

Ballast water (BW) is an important vector for the global transport of bacterial taxa, including pathogens. The application of molecular tools for evaluating and monitoring BW management practices could improve the accuracy and sensitivity of bacterial detections. However, few stu...

Biofilm Activity of Shewanella oneidensis on Gold Electrodes Monitored by Electrochemical Surface Plasmon Resonance Imaging (eSPRi)

This study investigates the use of electrochemical surface plasmon resonance imaging (eSPRi) to monitor the growth and activity of Shewanella oneidensis biofilms on gold film electrodes. Motivated by the need to understand extracellular electron transfer (EET) in biofilms, partic...

Unraveling the PFAS Helix: A Statistical Approach

Abstract The extreme persistence of per- and polyfluoroalkyl substances (PFAS) in the environment is rooted in their three-dimensional molecular conformation. The helical twist adopted by perfluoroalkyl chains due to hyperconjugation involving their recalcitrant C–F bonds governs...

The Photospheric Imprints of Coronal Electric Currents. I. Magnetic Structure near Polarity Inversion Lines

Abstract Flares and coronal mass ejections (CMEs) are powered by magnetic energy stored in coronal electric currents. Here, we use photospheric vector magnetic field observations to study currents in active regions 10930 and 11158, which both produced eruptive, X-class flares. We...

Polarization Measurement of Gamma-Ray Bursts with Fermi-GBM: The Case of GRB 180720B

Abstract To achieve confident nonzero polarization measurements for gamma-ray bursts (GRBs) we need sensitive polarimeters and bright GRBs. Here we report on the polarimetric analysis of the bright GRB 180720B using the Fermi Gamma-ray Burst Monitor (GBM). We rely on the detectio...

The Impacts of Zonal and Meridional Winds on the Observed Occurrence Rate of Equatorial Plasma Bubbles

Abstract Post‐sunset equatorial plasma bubble (EPB) formation is believe to be influenced by factors including thermospheric neutral winds. This study characterizes pre‐sunset neutral winds observed by ICON on EPB occurrences observed by GOLD over the east Atlantic. 3 years of da...

Demonstration of Proton Conduction in Electrolyte‐Supported Cesium Borophosphate Membrane Electrode Assemblies

Electrolyte‐supported membrane electrode assemblies (MEAs) were fabricated using Cs 3 H 2 [BOB(PO 4 ) 3 ] (affectionately dubbed CsBOB) as the electrolyte and membrane separator and tested for proton conduction and power generation at temperatures up to 250 °C. The devices reache...