Scalar Dissipation Criticality in Compressible Magnetized Turbulence

Posted by klaurent Tokyo

Kavli Affiliate: David Spergel | Summary:We extend the Obukhov-Corrsin theory of scalar turbulence to compressible flows with spatially variable, anisotropic diffusivity. Combining density and diffusivity into a single positive matrix field, a transport landscape, permits an exact scale-by-scale balance in which the sign-indefinite commutator between filtering and diffusion is eliminated rather than estimated. If the […]


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Searching for Embedded Protoplanets with the Keck/NIRC2 Vortex Coronagraph: Confirmation of a Core-accretion Planet in the Narrow Gap of the Elias 2-24 Disk

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:We present high-contrast imaging observations of seven stars obtained with the Keck/NIRC2 vortex coronagraph between 2018 May and June in the $L’$ and $M_s$ bands. All targets host protoplanetary disks with substructures such as gaps and cavities, potentially tracing ongoing planet formation. Our aim is to assess whether these embedded planets […]


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Single-electron detection in a high-purity Ge device

Posted by klaurent Chicago

Kavli Affiliate: Clarence Chang | Summary:High-purity germanium (HPGe) detectors are among the most powerful instruments for gamma ray spectroscopy, combining exceptional energy resolution with large active volumes. Although they operate close to the fundamental resolution limit at high energies, their performance at very low energies has long been limited by electronic noise, restricting detection thresholds […]


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Super-Earth Interiors Shrink by About 10% as They Crystallise

Posted by klaurent MIT

Kavli Affiliate: Sara Seager | Summary:Super-Earth exoplanets are among the most abundant planets known, yet their bulk densities leave the interior state degenerate. The static structure models used to interpret them, and the interior retrievals built on them, typically describe the cold, solidified end state of an evolution that begins hot and molten. During this […]


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