Single Frequency CMB Foreground Removal with Inter-scale Machine Learning

Posted by klaurent Cambridge

Kavli Affiliate: Blake Sherwin | Summary:Accurate measurements of Cosmic Microwave Background (CMB) B-mode polarization, a key probe of inflationary physics, are hindered by complex Galactic dust foregrounds. Traditional foreground removal with Internal Linear Combination (ILC) fully preserves the primordial signal but requires multi-frequency data and is limited to two-point statistics. We present a novel way […]


Continue.. Single Frequency CMB Foreground Removal with Inter-scale Machine Learning

Single Frequency CMB Foreground Removal with Inter-scale Machine Learning

Posted by klaurent Cambridge

Kavli Affiliate: Blake Sherwin | Summary:Accurate measurements of Cosmic Microwave Background (CMB) B-mode polarization, a key probe of inflationary physics, are hindered by complex Galactic dust foregrounds. Traditional foreground removal with Internal Linear Combination (ILC) fully preserves the primordial signal but requires multi-frequency data and is limited to two-point statistics. We present a novel way […]


Continue.. Single Frequency CMB Foreground Removal with Inter-scale Machine Learning

Laboratory demonstration of low order wavefront control using light reflected off the vortex coronagraph

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:The Astro2020 Decadal Survey identified exoplanet imaging as a high priority for the Habitable Worlds Observatory (HWO), which must image and characterize exo-Earths at contrasts of $1times10^-10$. The vector vortex coronagraph (VVC) is a leading architecture for this task owing to its small inner working angle and high throughput. Using light […]


Continue.. Laboratory demonstration of low order wavefront control using light reflected off the vortex coronagraph

Symmetry, Sound, and the Quest for Chiral Superconductors

Posted by klaurent Cornell

Kavli Affiliate: Brad Ramshaw | Summary:The confirmation of a bulk, topological superconductor is a central goal of modern quantum materials research. Despite decades of searching, no confirmed examples yet exist. A primary difficulty is that most experimental signatures of topological superconductivity are ambiguous and indirect. I review efforts to narrow the search for a chiral […]


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Accretion Burst Crystallizes Silicates in a Planet-Forming Disk

Posted by klaurent Peking

Kavli Affiliate: Gregory Herczeg | Summary:Crystalline silicates form at high temperatures (> 900 K; Fabian et al. 2000; Hallenbeck et al. 1998). Their presence in comets (Hanner et al. 1994; Hayward et al. 2000; Wooden et al. 2002; Shinnaka et al. 2018) suggests that high-temperature dust processing occurred in the early Solar System and was […]


Continue.. Accretion Burst Crystallizes Silicates in a Planet-Forming Disk

Proof of Concept Measurements of Laterally Graded Multilayers for Soft X-ray Spectropolarimetry

Posted by klaurent MIT

Kavli Affiliate: Herman Marshall | Summary:This work describes proof of concept measurements for a soft X-ray spectropolarimeter that utilizes laterally graded multilayer mirrors within a grating spectrometer. The work tests two multilayers: a Chromium-Scandium multilayer designed to be utilized at Brewster’s angle in the 200-400 eV range and a Tungsten Boron Carbide mirror designed to […]


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Design and testing progress towards the first flight of the rocket experiment demonstration of a Soft X-ray Polarimeter (REDSoX)

Posted by klaurent MIT

Kavli Affiliate: Moritz Guenther | Summary:The Rocket Experiment Demonstration of a Soft X-ray Polarimeter (REDSoX) is a NASA-funded, sounding rocket mission. The rocket payload will measure polarization strength and direction as a function of energy in the 0.2-0.4 keV band, providing complementary measurements to those made by IXPE in the 2-8 keV band. The first […]


Continue.. Design and testing progress towards the first flight of the rocket experiment demonstration of a Soft X-ray Polarimeter (REDSoX)

Design and testing progress towards the first flight of the rocket experiment demonstration of a Soft X-ray Polarimeter (REDSoX)

Posted by klaurent MIT

Kavli Affiliate: Ralf Heilmann | Summary:The Rocket Experiment Demonstration of a Soft X-ray Polarimeter (REDSoX) is a NASA-funded, sounding rocket mission. The rocket payload will measure polarization strength and direction as a function of energy in the 0.2-0.4 keV band, providing complementary measurements to those made by IXPE in the 2-8 keV band. The first […]


Continue.. Design and testing progress towards the first flight of the rocket experiment demonstration of a Soft X-ray Polarimeter (REDSoX)

An Exploratory Analysis of New Large Gaia-informed Quasar Samples in SDSS-V

Posted by klaurent Peking

Kavli Affiliate: Claudio Ricci | Summary:Quasars are luminous objects that provide insights into the physics and evolution of supermassive black holes (SMBHs) and their accretion flows, galaxy evolution, and even cosmology. In this study, we present an exploratory study based on the ongoing fifth generation of the Sloan Digital Sky Survey (SDSS-V) and its unique […]


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Superdiffusion at the Galactic Centre

Posted by klaurent Peking

Kavli Affiliate: Pau Amaro Seoane | Summary:Tracking S-star cluster orbits around Sgr A* calibrates orbital transport models for space-borne gravitational wave detectors. Standard kinetic theories model this cluster via local Fokker-Planck equations, which predict that general relativistic precession halts angular momentum diffusion at the Schwarzschild barrier. Because inverse-square gravitational encounters generate a Holtsmark torque distribution […]


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