FEASTS and MHONGOOSE: HI Column Density Distribution at $z=0$ for $N_mathrmHI>10^17.8, mathrmcm^-2$

Posted by klaurent Peking

Kavli Affiliate: Luis Ho | Summary:We present the first $z=0$ HI column density distribution function, $f(N_mathrmHI)$, extending down to $log (N_mathrmHI/mathrmcm^-2)=17.8$. This was derived from high-sensitivity 21-cm emission-line imaging at $sim$1 kpc resolution. At high-column-densities (19.8$< log (N_mathrmHI/mathrmcm^-2) <$21.3), our results align with earlier $z=0$ studies but benefit from 100 times greater sensitivity. Comparisons with […]


Continue.. FEASTS and MHONGOOSE: HI Column Density Distribution at $z=0$ for $N_mathrmHI>10^17.8, mathrmcm^-2$

An Adolescent and Near-Resonant Planetary System Near the End of Photoevaporation

Posted by klaurent MIT

Kavli Affiliate: Avi Shporer | Summary:Young exoplanets provide vital insights into the early dynamical and atmospheric evolution of planetary systems. Many multi-planet systems younger than 100 Myr exhibit mean-motion resonances, likely established through convergent disk migration. Over time, however, these resonant chains are often disrupted, mirroring the Nice model proposed for the Solar System. We […]


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Quantifying Element Importance for Mass Recovery from Population III Supernova Yield Fits

Posted by klaurent Chicago

Kavli Affiliate: Alexander Ji | Summary:Massive Population III stars are currently not observed, but their initial mass function (IMF) can be inferred through stellar archaeology: fitting core-collapse supernova yield models to elemental abundances of low-mass, long-lived metal-poor stars. While prior work demonstrates that yield fitting can recover progenitor properties, it remains unclear which measured elements […]


Continue.. Quantifying Element Importance for Mass Recovery from Population III Supernova Yield Fits

GPU-accelerated single-cell analysis at scale with rapids-singlecell

Posted by klaurent Berkeley

Kavli Affiliate: Felix Fischer | Summary:Single-cell sequencing technologies reveal cellular heterogeneity at high resolution, advancing our understanding of biological complexity. As datasets start to scale to tens of millions of cells, computational workflows face substantial bottlenecks, with CPU-based analytical pipelines requiring hours or days for routine processing steps like filtering, normalization, and clustering. These scalability […]


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Electro-optic modulation of coherent and incoherent mid-IR radiation in two-dimensional arrays

Posted by klaurent Caltech

Kavli Affiliate: Harry Atwater | Summary:Light in the mid-infrared (mid-IR) spans wavelengths from 3-8 $μ$m and is important to many applications such as gas sensing and thermal imaging. Due to materials challenges, there is currently a lack of mid-IR reconfigurable optical elements. Here, we present an electrically addressable metasurface for modulation of coherent and incoherent […]


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Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

Posted by klaurent Delft

Kavli Affiliate: Giordano Scappucci | Summary:As silicon spin qubit chips are increasing in qubit number and area, methods for the screening of qubit related material parameters become vital. Here we demonstrate the two-dimensional mapping of small variations of the electron g-factor of quantum dots formed in planar Si/SiGe quantum wells with precision better than $10^-3$ […]


Continue.. Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

Posted by klaurent Delft

Kavli Affiliate: Giordano Scappucci | Summary:As silicon spin qubit chips are increasing in qubit number and area, methods for the screening of qubit related material parameters become vital. Here we demonstrate the two-dimensional mapping of small variations of the electron g-factor of quantum dots formed in planar Si/SiGe quantum wells with precision better than $10^-3$ […]


Continue.. Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

Posted by klaurent Delft

Kavli Affiliate: Giordano Scappucci | Summary:As silicon spin qubit chips are increasing in qubit number and area, methods for the screening of qubit related material parameters become vital. Here we demonstrate the two-dimensional mapping of small variations of the electron g-factor of quantum dots formed in planar Si/SiGe quantum wells with precision better than $10^-3$ […]


Continue.. Mapping g-factors and complex intervalley coupling in Si/SiGe by conveyor-mode shuttling

A Unified Explanation for JWST Little Red Dots and High-Redshift Low-Mass Disk-like Galaxies: Prolate Galaxies Viewed End-on vs Side-on

Posted by klaurent Peking

Kavli Affiliate: Yingjie Peng | Summary:Recent JWST surveys have revealed two puzzling high-redshift phenomena: (1) an unexpectedly large abundance of flattened, disk-like galaxies at z > 3, and (2) a rare population of compact, extremely red sources at z ~ 4-9 ("Little Red Dots," LRDs) that often show V-shaped SEDs and very broad Balmer lines. […]


Continue.. A Unified Explanation for JWST Little Red Dots and High-Redshift Low-Mass Disk-like Galaxies: Prolate Galaxies Viewed End-on vs Side-on

Local Analogs of Little Red Dots: Optical Variability and Evidence for an Active Galatic Nucleus Origin

Posted by klaurent Peking

Kavli Affiliate: Luis Ho | Summary:Little red dots (LRDs) draw extensive attention because of their unique observational characteristics and apparent overabundance in the early Universe, raising new insights into early black hole formation and growth. Early studies show that LRDs exhibit weak variability in broad-band photometry and emission-line fluxes, suggesting a preference for super-Eddington accretion […]


Continue.. Local Analogs of Little Red Dots: Optical Variability and Evidence for an Active Galatic Nucleus Origin