Darkness in the Crust: Searching for the truly “Dark” Subhalos with Paleo-detectors

Kavli Affiliate: Lina Necib | First 5 Authors: Xiuyuan Zhang, Lina Necib, Denis Erkal, , | Summary: Low-mass dark matter (DM) subhalos are pivotal in understanding the small-scale structure of the universe, thereby offering a sensitive method to discriminate between different cosmological models. In this study, we estimate the local number density of cold DM […]


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Prospects for Detecting Signs of Life on Exoplanets in the JWST Era

Kavli Affiliate: Sara Seager | First 5 Authors: Sara Seager, Luis Welbanks, Lucas Ellerbroek, William Bains, Janusz J. Petkowski | Summary: The search for signs of life in the Universe has entered a new phase with the advent of the James Webb Space Telescope (JWST). Detecting biosignature gases via exoplanet atmosphere transmission spectroscopy is in […]


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WINTER on S250206dm: A near-infrared search for an electromagnetic counterpart

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Danielle Frostig, Viraj R. Karambelkar, Robert D. Stein, Nathan P. Lourie, Mansi M. Kasliwal | Summary: We present near-infrared follow-up observations of the International Gravitational Wave Network (IGWN) event S250206dm with the Wide-Field Infrared Transient Explorer (WINTER). WINTER is a near-infrared time-domain survey designed for electromagnetic […]


Continue.. WINTER on S250206dm: A near-infrared search for an electromagnetic counterpart

The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods

Kavli Affiliate: Saul A. Rappaport | First 5 Authors: Brian P. Powell, Guillermo Torres, Veselin B. Kostov, Tamás Borkovits, Saul A. Rappaport | Summary: We present the discovery of two quadruple star systems — TIC 285853156 and TIC 392229331 — each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC […]


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Investigating the emission mechanism in the spatially-resolved jet of two z $approx$ 3 radio-loud quasars

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Jaya Maithil, Daniel A. Schwartz, Aneta Siemiginowska, Preeti Kharb, Diana M. Worrall | Summary: This study focuses on high-redshift, z > 3, quasars where resolved X-ray jets remain underexplored in comparison to nearby sources. Building upon previous work, we identify and confirm extended kpc-scale jets emission […]


Continue.. Investigating the emission mechanism in the spatially-resolved jet of two z $approx$ 3 radio-loud quasars

A Comprehensive Study of Thermonuclear X-ray Bursts from 4U 1820-30 with NICER: Accretion Disk Interactions and a Candidate Burst Oscillation

Kavli Affiliate: Deepto Chakrabarty | First 5 Authors: Gaurava K. Jaisawal, Z. Funda Bostancı, Tuğba Boztepe, Tolga Güver, Tod E. Strohmayer | Summary: We present the results obtained from timing and spectral studies of 15 thermonuclear X-ray bursts from 4U 1820-30 observed with the Neutron Star Interior Composition Explorer (NICER) during its five years of […]


Continue.. A Comprehensive Study of Thermonuclear X-ray Bursts from 4U 1820-30 with NICER: Accretion Disk Interactions and a Candidate Burst Oscillation

Rapid inference and comparison of gravitational-wave population models with neural variational posteriors

Kavli Affiliate: Salvatore Vitale | First 5 Authors: Matthew Mould, Noah E. Wolfe, Salvatore Vitale, , | Summary: The LIGO-Virgo-KAGRA catalog has been analyzed with an abundance of different population models due to theoretical uncertainty in the formation of gravitational-wave sources. To expedite model exploration, we introduce an efficient and accurate variational Bayesian approach that […]


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Discovery of extreme Quasi-Periodic Eruptions in a newly accreting massive black hole

Kavli Affiliate: Erin Kara | First 5 Authors: Lorena Hernández-García, Joheen Chakraborty, Paula Sánchez-Sáez, Claudio Ricci, Jorge Cuadra | Summary: Quasi-periodic eruptions (QPEs) are rapid, recurring X-ray bursts from supermassive black holes, believed to result from interactions between accretion disks and surrounding matter. The galaxy SDSS1335+0728, previously stable for two decades, exhibited an increase in […]


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Rapidly varying ionization features in a Quasi-periodic Eruption: a homologous expansion model for the spectroscopic evolution

Kavli Affiliate: Erin Kara | First 5 Authors: Joheen Chakraborty, Peter Kosec, Erin Kara, Giovanni Miniutti, Riccardo Arcodia | Summary: Quasi-Periodic Eruptions (QPEs) are recurring bursts of soft X-ray emission from supermassive black holes (SMBHs), which a growing class of models explains via extreme mass-ratio inspirals (EMRIs). QPEs exhibit blackbody-like emission with significant temperature evolution, […]


Continue.. Rapidly varying ionization features in a Quasi-periodic Eruption: a homologous expansion model for the spectroscopic evolution

Discovery of extreme Quasi-Periodic Eruptions in a newly accreting massive black hole

Kavli Affiliate: Erin Kara | First 5 Authors: Lorena Hernández-García, Joheen Chakraborty, Paula Sánchez-Sáez, Claudio Ricci, Jorge Cuadra | Summary: Quasi-periodic eruptions (QPEs) are rapid, recurring X-ray bursts from supermassive black holes, believed to result from interactions between accretion disks and surrounding matter. The galaxy SDSS1335+0728, previously stable for two decades, exhibited an increase in […]


Continue.. Discovery of extreme Quasi-Periodic Eruptions in a newly accreting massive black hole