Kavli Affiliate: Lee McCuller | Summary:We present a bidirectional internal squeezing scheme for gravitational-wave detectors and show that it saturates the lowest known lower bounds on quantum noise from internal optical dissipation. The scheme uses two optical parametric amplification stages inside the signal-extraction cavity that act on intra-cavity fields propagating in opposite directions. Thereby, most […]
Kavli Affiliate: Mark Vogelsberger | Summary:Understanding how galaxies and active galactic nuclei (AGN) jointly drive the reionization of the intergalactic medium (IGM) across cosmic time remains a major challenge in cosmology. We present Lumina, a large-volume radiation-hydrodynamic simulation that self-consistently follows the coupled evolution of the intergalactic medium, galaxies, and AGN through HI, HeI, and […]
Kavli Affiliate: Mark Vogelsberger | Summary:Understanding how galaxies and active galactic nuclei (AGN) jointly drive the reionization of the intergalactic medium (IGM) across cosmic time remains a major challenge in cosmology. We present Lumina, a large-volume radiation-hydrodynamic simulation that self-consistently follows the coupled evolution of the intergalactic medium, galaxies, and AGN through HI, HeI, and […]
Kavli Affiliate: Moritz Guenther | Summary:The Chandra Interactive Analysis of Observations (CIAO) software, developed by the Chandra X-ray Center, has been the data analysis package for the Chandra X-ray Observatory since its launch in 1999. Over nearly three decades, CIAO has grown from a small software suite into a widely used system for X-ray data […]
Kavli Affiliate: Anna Frebel | Summary:Ultra-faint dwarf galaxies (UFDs, $M_* < 10^5 M_odot$) offer unique insights into early chemical evolution in low-mass systems. However, interpreting their metallicity distribution functions (MDFs) has been challenging due to limited spectroscopic samples, especially beyond the red giant branch. We present metallicities from the Ca II K absorption feature, measured […]
Kavli Affiliate: Anna Frebel | Summary:Ultra-faint dwarf galaxies (UFDs; stellar masses $M_* < 10^5,M_odot$) offer unique insights into early chemical evolution in low-mass systems. However, interpreting their metallicity distribution functions (MDFs) has been challenging due to limited spectroscopic samples, especially beyond the red giant branch. We present metallicities from the CaII K absorption feature, measured […]
Kavli Affiliate: Avi Shporer | Summary:We report the discovery and characterisation of the multi-planetary system around TOI-4311, a K dwarf kinematically between the Galactic thick disk and Hercules stream. TOI-4311 hosts an ultra-short-period super-Earth (P$sim$0.99 d, $1.376substack+0.077\-0.080$ R$_oplus$) and a longer period sub-Neptune (P$sim$15 d, $2.47substack+0.12\-0.11$ R$_oplus$) that was first detected in the TESS photometry. […]
Kavli Affiliate: Paul Schechter | Summary:Lensed supernovae (SNae) are among the most eagerly anticipated transients expected from the Legacy Survey of Space and Time (LSST). Quadruply lensed SNae permit more highly constrained models than "mere" doubles. The quadruply lensed SN 2025wny offers multiple lessons on how one might respond to an alert. The full benefits […]
Kavli Affiliate: Anna Frebel | Summary:As part of the ongoing work of the $R$-Process Alliance (RPA), detailed abundance measurements of 29 heavy elements in three metal-poor stars, 2MASS J14592981$-$3852558, 2MASS J19445483$-$4039459, and 2MASS J15211026$-$0607566, are presented based on an analysis of high-resolution ($Rsim 80,000$), high signal-to-noise “portrait” spectra from the Magellan Inamori Kyocera Echelle (MIKE) […]
Kavli Affiliate: Kiyoshi Masui | Summary:We present 30 newly discovered repeating fast radio burst (FRB) sources from the second catalog of bursts detected by the FRB backend on the Canadian Hydrogen Intensity Mapping Experiment (CHIME/FRB). These repeaters have extragalactic dispersion measures (DMs) spanning $99.4-1446.0 textpc cm^-3$ and burst rates between $10^-5.7$ and $10^-0.5$ hr$^-1$ scaled […]