IXPE Polarizations of the Lighthouse Pulsar, Trail, and Filament

Kavli Affiliate: Roger Romani | Summary:The Lighthouse pulsar (PSR J1101$-$6101) sports a bright X-ray trail and filament. The synchrotron emission from both structures is expected to be polarized, with electric vector position angle (EVPA) perpendicular to the magnetic field direction and polarization degree (PD) indicating the local degree of magnetic turbulence. We present a 1 […]


Continue.. IXPE Polarizations of the Lighthouse Pulsar, Trail, and Filament

Backlighting the Cosmic Web with Fast Radio Bursts: An Anthology of Dispersion Measure Cross-Correlations with Large-Scale Structure and Baryon Tracers

Kavli Affiliate: W. L. Kimmy Wu | Summary:Fast Radio Bursts (FRBs) probe baryons permeating the cosmic web through their dispersion measures (DMs), which encode the integrated electron density along cosmological sightlines. Using 3,455 unique FRB sources from CHIME/FRB with $sim 15$ arcmin localizations, we present an anthology of DM correlations with tracers of large-scale structure […]


Continue.. Backlighting the Cosmic Web with Fast Radio Bursts: An Anthology of Dispersion Measure Cross-Correlations with Large-Scale Structure and Baryon Tracers

The Effects of Complex Accretion Disk Geometry on Broadened Iron K$α$ Lines

Kavli Affiliate: Daniel R. Wilkins | Summary:X-rays are emitted from the corona above the orbiting matter of the accretion disk and travel either directly to us or illuminate the disk. This illumination of the inner disk is enhanced by gravitational light bending, which focuses the rays towards the black hole and therefore towards the inner […]


Continue.. The Effects of Complex Accretion Disk Geometry on Broadened Iron K$α$ Lines

The Effects of Complex Accretion Disk Geometry on Broadened Iron K$α$ Lines

Kavli Affiliate: Daniel R. Wilkins | Summary:X-rays are emitted from the corona above the orbiting matter of the accretion disk and travel either directly to us or illuminate the disk. This illumination of the inner disk is enhanced by gravitational light bending, which focuses the rays towards the black hole and therefore towards the inner […]


Continue.. The Effects of Complex Accretion Disk Geometry on Broadened Iron K$α$ Lines

Geometry, Not Calorimetry, Drives the Radio/Infrared/Gamma-Ray Correlation

Kavli Affiliate: Igor Moskalenko | Summary:We investigate whether the observed radio-infrared-$γ$-ray correlation in star-forming galaxies is a geometric effect rather than a signature of local cosmic-ray (CR) calorimetry. Using the GALPROP framework, we generate synthetic observations for external viewers from a grid of 3D Milky Way models with varied CR source, gas, interstellar radiation, and […]


Continue.. Geometry, Not Calorimetry, Drives the Radio/Infrared/Gamma-Ray Correlation

Geometry, Not Calorimetry, Drives the Radio/Infrared/Gamma-Ray Correlation

Kavli Affiliate: Igor Moskalenko | Summary:We investigate whether the observed radio-infrared-$γ$-ray correlation in star-forming galaxies is a geometric effect rather than a signature of local cosmic-ray (CR) calorimetry. Using the GALPROP framework, we generate synthetic observations for external viewers from a grid of 3D Milky Way models with varied CR source, gas, interstellar radiation, and […]


Continue.. Geometry, Not Calorimetry, Drives the Radio/Infrared/Gamma-Ray Correlation

Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night

Kavli Affiliate: Sven Herrmann | Summary:The Lunar Surface Electromagnetics Experiment (LuSEE-Night) is a joint NASA-DOE-ESA low-frequency radio telescope that will reach the lunar far side in 2027. The unknown dielectric properties of the subsurface at the LuSEE-Night landing site impose the most significant limitation for precision instrument calibration, as reflections from the lunar subsurface can […]


Continue.. Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night

Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night

Kavli Affiliate: Sven Herrmann | Summary:The Lunar Surface Electromagnetics Experiment (LuSEE-Night) is a joint NASA-DOE-ESA low-frequency radio telescope that will reach the lunar far side in 2027. The unknown dielectric properties of the subsurface at the LuSEE-Night landing site impose the most significant limitation for precision instrument calibration, as reflections from the lunar subsurface can […]


Continue.. Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night

Characterizing Earth analogs may require a moderate or high-resolution spectrograph

Kavli Affiliate: Bruce Macintosh | Summary:A primary goal of the Habitable Worlds Observatory (HWO) is to detect and measure the abundance of biosignature molecules, such as water (H2O) and oxygen (O2), in the atmosphere of Earth analogs. This is expected to require deep spectroscopic observations lasting hundreds of hours per planet. In this context, it […]


Continue.. Characterizing Earth analogs may require a moderate or high-resolution spectrograph

DMRadio-Core: A new approach for GUT-scale axion searches

Kavli Affiliate: Kent Irwin | Summary:Searches for QCD axions with masses in the neV/$c^2$ mass range are strongly motivated by new physics at the GUT scale and by well-motivated pre-inflationary axion symmetry breaking scales. This parameter space is challenging to probe due to the small axion-photon couplings, which typically require large, high-field magnets with substantial […]


Continue.. DMRadio-Core: A new approach for GUT-scale axion searches