Local Analogs of Little Red Dots: Optical Variability and Evidence for an AGN 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 AGN Origin

Local Analogs of Little Red Dots: Optical Variability and Evidence for an AGN 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 AGN Origin

TESS Hunt for Young and Maturing Exoplanets (THYME) XIV: A Comoving-Based Age Constraint for KELT-20

Posted by klaurent MIT

Kavli Affiliate: Andrew Vanderburg | Summary:Young stellar moving groups offer unique opportunities to investigate the early evolution of stellar and planetary systems. In continuation of an ongoing effort to age-date compelling planetary systems, we provide an in-depth age analysis of KELT-20, a young A-type star that hosts a well-aligned ultra-hot Jupiter. This system poses a […]


Continue.. TESS Hunt for Young and Maturing Exoplanets (THYME) XIV: A Comoving-Based Age Constraint for KELT-20

The effect of photon re-scattering due to cosmic reionization on 21-cm images and power spectra

Posted by klaurent Cambridge

Kavli Affiliate: George Efstathiou | Summary:The 21-cm signal from neutral hydrogen serves as a critical tool for unraveling the astrophysical processes that shaped cosmic dawn and the epoch of reionization. We explore the usually overlooked impact of re-scattering of 21-cm photons during and after reionization, similarly to cosmic microwave background photons. This scattering affects the […]


Continue.. The effect of photon re-scattering due to cosmic reionization on 21-cm images and power spectra

CelloAI Benchmarks: Toward Repeatable Evaluation of AI Assistants

Posted by klaurent Chicago

Kavli Affiliate: Salman Habib | Summary:Large Language Models (LLM) are increasingly used for software development, yet existing benchmarks for LLM-based coding assistance do not reflect the constraints of High Energy Physics (HEP) and High Performance Computing (HPC) software. Code correctness must respect science constraints and changes must integrate into large, performance-critical codebases with complex dependencies […]


Continue.. CelloAI Benchmarks: Toward Repeatable Evaluation of AI Assistants