A single power law for the TRAPPIST-1 flare distribution across four orders of magnitude in energy

Posted by klaurent MIT

Kavli Affiliate: Sara Seager | Summary:TRAPPIST-1 is an ultra-cool dwarf that flares frequently. These flares shape the surrounding planets’ high-energy irradiation environments, with consequences for atmospheric chemistry and escape, and they can contaminate transmission spectroscopy of those planets. A quantitative flare-frequency distribution (FFD) spanning the full energy range is therefore essential for both interpreting JWST […]


Continue.. A single power law for the TRAPPIST-1 flare distribution across four orders of magnitude in energy

Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves

Posted by klaurent Chicago

Kavli Affiliate: Edward Kolb | Summary:We explore the coincidence of scales between cosmic inflation and right-handed neutrinos in seesaw models. We show that inflation models, which will be tested by next-generation CMB experiments, can produce right-handed neutrinos in sufficient abundance to explain the observed baryon asymmetry of the universe. The model can be tested by […]


Continue.. Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves

No model-independent evidence for a peak in binary black hole spin (mis)alignments

Posted by klaurent MIT

Kavli Affiliate: Salvatore Vitale | Summary:The degree of black-hole spin-orbit misalignment ("tilts") in the astrophysical population could be a powerful diagnostic to distinguish between binary formation in isolation, in dynamical environments, or in hierarchical triples. However, robust population-level spin tilt measurements are complicated by model misspecification as well as numerical and Poisson variance, ultimately owing […]


Continue.. No model-independent evidence for a peak in binary black hole spin (mis)alignments

Competing nonlinearities, criticality, and order-to-chaos transition in deep networks

Posted by klaurent Cornell

Kavli Affiliate: Debanjan Chowdhury | Summary:Deep neural networks owe their expressive power to nonlinear activation functions. The effective field theory of signal propagation at initialization reveals a few distinct universality classes of activations that exhibit different depth scaling. Tuning across these, especially with analytical control, is an open problem. We show that a statistical mixture […]


Continue.. Competing nonlinearities, criticality, and order-to-chaos transition in deep networks

The Converging Effects of Different Categories of Antidepressants on the Brain: A Systematic Meta-Analysis of Public Transcriptional Profiling Data from the Hippocampus and Cortex

Posted by dbos Columbia

Kavli Affiliate: René Hen | Authors: Eva M Geoghegan, Megan Hastings Hagenauer, Erin Hernandez, Sophia Espinoza, Elizabeth I Flandreau, Phi T. Nguyen, Adrienne N. Santiago, Mubashshir Ra’eed Bhuiyan, Sophie Mensch, Stanley J. Watson, Jr., Huda Akil and René Hen | Summary: Depression can be treated with traditional pharmaceuticals targeting monoaminergic function, non-traditional drug classes and […]


Continue.. The Converging Effects of Different Categories of Antidepressants on the Brain: A Systematic Meta-Analysis of Public Transcriptional Profiling Data from the Hippocampus and Cortex

Therapeutic targeting of fibrin-microglia interactions ameliorates Alzheimer disease-related hyperexcitability and brain network dysfunction

Posted by dbos UCSD / Salk

Kavli Affiliate: Mark Ellisman | Authors: Kelli Lauderdale, Zhaoqi Yan, Andrew S. Mendiola, Yutong Zhang, Dakota Mallen, Pranav Nambiar, Erica Brady, Stephanie R. Miller, Rosa Meza Acevedo, Belinda Cabriga, Fred Jiang, Nick Kaliss, Kevin Shen, Jia Shin, Jessica Herbert, Keran Ma, Jae Kyu Ryu, Ayushi Agrawal, Renaud Schuck, Maria del Pilar S. Alzamora, Jorge Sanz-Ros, […]


Continue.. Therapeutic targeting of fibrin-microglia interactions ameliorates Alzheimer disease-related hyperexcitability and brain network dysfunction

Accumulation of neural state transitions in dorsomedial striatum predicts patch foraging decisions

Posted by dbos Hopkins

Kavli Affiliate: Marshall Hussain Shuler | Authors: Elissa Sutlief, Shichen Zhang, Kate Forsberg and Marshall G Hussain Shuler | Summary: Activities with temporally distributed returns require deciding not only what to do, but when to stop. Although optimal foraging theory predicts that patch departure should depend on the total time invested in a patch, behavior […]


Continue.. Accumulation of neural state transitions in dorsomedial striatum predicts patch foraging decisions

Little red dots as obscured little blue dots: relative abundances, luminosities, and black-hole masses

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:We test whether “little red dots” (LRDs) are the dust-reddened, high-inclination counterparts of bluer compact broad-line active galactic nuclei, here referred to as “little blue dots” (LBDs), by modeling their relative number densities and luminosities. Using the observed UV luminosity function (LF) of broad-line active galactic nuclei (BLAGNs) at z>4 […]


Continue.. Little red dots as obscured little blue dots: relative abundances, luminosities, and black-hole masses

Notch-driven fate asymmetry dictates hair cell behavior via a fate-specific kinase

Posted by dbos Rockefeller

Kavli Affiliate: A. James Hudspeth | Authors: Emily Atlas, Caleb C. Reagor, Brian Frost, Sapna Krishnakumar, A. J. Hudspeth and Adrian Jacobo | Summary: Cell-cell signaling and cell-fate decisions are essential for organ assembly, but how these molecular events translate into the physical properties and cell behaviors that drive development remains poorly understood. In the […]


Continue.. Notch-driven fate asymmetry dictates hair cell behavior via a fate-specific kinase