The future of high-resolution UV spectroscopy: Science with a UV Échelle spectrograph on the Habitable Worlds Observatory, or a dedicated mission

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:High-resolution UV spectroscopy serves a diversity of science cases, from small bodies to planets, stars, and galaxies, but is currently limited to the Hubble Space Telescope and bright targets. Major advances require increasing sensitivity by at least one order of magnitude. Here we present the UV science cases for PEGASUS […]


Continue.. The future of high-resolution UV spectroscopy: Science with a UV Échelle spectrograph on the Habitable Worlds Observatory, or a dedicated mission

Overmassive No More: The Case for Little Red Dots Hosting Black Hole Seeds as Massive as Single Supermassive Stars

Posted by klaurent MIT

Kavli Affiliate: Robert Simcoe | Summary:Little Red Dots (LRDs) display singular properties unlike any known class of AGN or galaxies, motivating novel mass estimators for their central engines. Inspired by their similarities to stellar phenomena, here we interpret the LRD continuum as being produced by a pseudo-photosphere. We fit tailored stellar atmosphere models to host-subtracted […]


Continue.. Overmassive No More: The Case for Little Red Dots Hosting Black Hole Seeds as Massive as Single Supermassive Stars

RIGEL: Ultra-faint dwarf galaxy diversity shaped by inhomogeneous cosmic reionization

Posted by klaurent MIT

Kavli Affiliate: Mark Vogelsberger | Summary:Ultra-faint dwarf galaxies (UFDs) are among the smallest and oldest galaxies in the Universe and are widely regarded as relics of cosmic reionization. To investigate how reionization quenches star formation and shapes the diversity of UFDs, we present a suite of eight cosmological zoom-in simulations of isolated UFDs with present-day […]


Continue.. RIGEL: Ultra-faint dwarf galaxy diversity shaped by inhomogeneous cosmic reionization

SHELLQs. Black Hole Mass and Eddington Ratio Distributions of Intermediate-Luminosity Quasars at 6

Posted by klaurent Peking

Kavli Affiliate: Kohei Inayoshi | Summary:We present near-infrared spectroscopy of 21 quasars at 6.07 < z < 6.90 obtained with JWST/NIRSpec and Subaru/MOIRCS. These targets have absolute ultraviolet magnitudes of -25 < M_1450 < -22 and are drawn from a sample of z>6 quasars identified in the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project. […]


Continue.. SHELLQs. Black Hole Mass and Eddington Ratio Distributions of Intermediate-Luminosity Quasars at 6

Lipid Activation of a Thalamic GPCR Extends Working Memory Time-scales

Posted by dbos Rockefeller

Kavli Affiliate: Vanessa Ruta and Priya Rajasethupathy | Authors: James Newton Brandt, Alessandra Bonito-Oliva, Navid Paknejad, Celine Chen, John J Fak, Andrew Luskin, Genelle Rankin, Miriam Kirylo, Leslie J Sibener, Amy Arnsten, Vanessa Ruta and Priya Rajasethupathy | Summary: Working memory capacity is poorly understood. The ability to control and extend working memory time-scales provides […]


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Gonadal remodelling in socially driven sex change is associated with novel and known sex genes, epigenetic reprogramming, and inflammation-mediated apoptosis.

Posted by dbos Rockefeller

Kavli Affiliate: Erich Jarvis | Authors: Chloé A van der Burg, Alexander A Goikoetxea, Simon Muncaster, Oscar Ortega-Recalde, Tim Hore, Kaj Kamstra, Olivier Fedrigo, Erich D Jarvis, Alan Tracey, Kerstin Howe, Erica V Todd and Neil Gemmell | Summary: Many fish undergo dramatic, socially cued female-to-male sex change, yet the events that initiate and then […]


Continue.. Gonadal remodelling in socially driven sex change is associated with novel and known sex genes, epigenetic reprogramming, and inflammation-mediated apoptosis.

Wnt/beta-catenin signaling regulates Vascular Endothelial Growth Factor (VEGF) receptors in central nervous system endothelial cells

Posted by dbos Hopkins

Kavli Affiliate: Jeremy Nathans | Authors: Jeremy Nathans, Yanshu Wang, Ningyu Zhu, Amir Rattner and Philip M Smallwood | Summary: In CNS endothelial cells (ECs), VEGF signaling promotes vascular permeability, and Wnt/beta-catenin signaling reduces vascular permeability by controlling the gene expression program for the blood-brain barrier. Here we show, using genetic mosaics, that, in mouse […]


Continue.. Wnt/beta-catenin signaling regulates Vascular Endothelial Growth Factor (VEGF) receptors in central nervous system endothelial cells

Near-Horizon Tidal Disruption Events

Posted by klaurent Peking

Kavli Affiliate: Xian Chen| Summary: Tidal disruption events (TDEs) offer a unique dynamical probe of the spacetime geometry around supermassive black holes (SMBHs). While conventional TDEs occur around SMBHs of $M_bullet sim 10^6 – 10^7 M_odot$, where stars are disrupted far from the event horizon, here we identify a special class of TDEs around rapidly […]


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Signatures of nodal superconductivity in stoichiometric FeTe

Posted by klaurent Cornell

Kavli Affiliate: Katja C. Nowack | Summary:Superconductivity in stoichiometric FeTe opens access to the FeTe endpoint of the Fe(Se,Te) phase diagram, yet the nature of its superconducting pairing state remains unresolved. In this work, we combine scanning superconducting quantum interference device (SQUID) microscopy, electrical transport, scanning tunneling microscopy and spectroscopy (STM/S), and mean-field calculations to […]


Continue.. Signatures of nodal superconductivity in stoichiometric FeTe