Kavli Affiliate: Wayne Hu | Summary:If the Peccei-Quinn symmetry of an ultralight axion is broken before the end of inflation, axion quantum fluctuations seed isocurvature perturbations, linking them to the tensor-to-scalar ratio $r$. We extend the effective time average (ETA) approach of the Boltzmann code $rm AxiECAMB$ to accurately evolve these perturbations across the full […]
Kavli Affiliate: Li Zhao | Authors: Zhao Li, Aaron James and Shengxuan Li | Summary: Single-cell differential expression (DE) reports changes in mature mRNA abundance, but the same fold-change can reflect faster synthesis or slower decay. Metabolic labeling resolves this ambiguity but is costly and cannot be applied retrospectively to the vast majority of published […]
Kavli Affiliate: Menno Witter | Authors: Yassir El-Amri, Nelson David Villalba-Moreno, Julia Urban, Maider Alzueta-Torrecillas, Cesar A Valdez-Gaxiola, Juliana Gonzalez-Perez, Zhiyuan Song, Rui Tang, Duvan Cardona-Madrigal, Andres Villegas, Susanne Krasemann, Markus Glatzel, David Aguillon, Asgeir Kobro-Flatmoen, Menno Witter, Victoria Fernandez, Haiqing Zhao, Agustin Ruiz, Claudia Marino and Diego Sepulveda-Falla | Summary: Two PSEN1 E280A carriers have presented […]
Kavli Affiliate: Nergis Mavalvala | Summary:Feedback oscillators, such as lasers and masers, serve as time references in modern computing, communication, and measurement. Quantum fluctuations ultimately limit their phase stability and ability to keep time precisely; in the absence of quantum engineering, their phase stability is bounded by a standard quantum limit (SQL). Techniques to improve […]
Kavli Affiliate: Roberto Maiolino | Summary:We present JWST/NIRSpec IFU spectroscopy of the central $618times618$ pc$^2$ ($sim3”times3”$) of NGC 4696, the BCG in the Centaurus cluster. Leveraging the $sim0.1”$ ($20.6$ pc) pixel size of JWST, we resolve a compact circumnuclear rotating disk (radius of $sim120$ pc) traced by Pa$α$ and H$_2$ 1$-$0 S(1) emission, which allows […]
Kavli Affiliate: Andrey Kravtsov | Summary:Oxygen is forged by stars and redistributed through galaxies by feedback-driven outflows, leaving a record of star formation and the baryon cycle imprinted on its present-day abundance and distribution. The Galaxies Losing Oxygen via Winds (GLOW) project quantifies the production, distribution, and retention of oxygen in 37 low-mass, low-metallicity, gas-rich […]
Kavli Affiliate: Edward Kolb | Summary:Magnetic monopoles are captured efficiently by neutron stars, and if they catalyze nucleon decay, the decay products would thermalize and generate observable X-ray surface emission. We use archival Chandra, XMM-Newton, and Swift-XRT data for old isolated millisecond pulsars to place conservative limits on the Galactic monopole flux ($F_M$). For a […]
Kavli Affiliate: R. G. McMahon | Summary:The Hubble tension remains a significant challenge in modern cosmology, exhibiting a discrepancy between early-Universe cosmic microwave background measurements and local distance ladder observations. Strong lensing time-delay cosmography provides an independent, geometric probe of $H_0$ that can help resolve this discrepancy. Although hundreds of lensed quasars have been discovered, […]
Kavli Affiliate: R. G. McMahon | Summary:The Hubble-Lemaître tension remains a significant challenge in modern cosmology, exhibiting a discrepancy between early-Universe cosmic microwave background measurements and local distance ladder observations. Strong lensing time-delay cosmography provides an independent, geometric probe of $H_0$ that can help resolve this discrepancy. Although hundreds of lensed quasars have been discovered, […]
Kavli Affiliate: R. G. McMahon | Summary:The Hubble-Lemaître tension remains a significant challenge in modern cosmology, exhibiting a discrepancy between early-Universe cosmic microwave background measurements and local distance ladder observations. Strong lensing time-delay cosmography provides an independent, geometric probe of $H_0$ that can help resolve this discrepancy. Although hundreds of lensed quasars have been discovered, […]