Kavli Affiliate: Roberto Maiolino | First 5 Authors: Joris Witstok, Joris Witstok, , , | Summary: The unexpectedly high abundance of galaxies at $z > 11$ revealed by JWST has sparked a debate on the nature of early galaxies and the physical mechanisms regulating their formation. The Atacama Large Millimeter/submillimeter Array (ALMA) has begun to […]

Kavli Affiliate: George Efstathiou | First 5 Authors: Joel Wasserman, Joel Wasserman, , , | Summary: The first stars, the chemically pristine Population III, likely played an important role in heating the intergalactic medium during the epoch of cosmic dawn. The very high effective temperatures ($sim 10^5$ K) predicted for the most massive Population III […]

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Pierluigi Rinaldi, Pierluigi Rinaldi, , , | Summary: Little Red Dots (LRDs) are compact, red sources discovered by JWST at high redshift ($z gtrsim 4$), marked by distinctive "V-shaped" spectral energy distributions (SEDs) and often interpreted as rapidly accreting AGNs. Their evolution remains unclear, as identifying counterparts […]

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Matilde Brazzini, Matilde Brazzini, , , | Summary: The majority of Little Red Dots (LRDs) hosting Active Galactic Nuclei (AGN) exhibits broad H$alpha$ emission, which recent studies propose originates from scattering off free electrons within an ionized and dense medium embedding the Broad Line Region (BLR), rather […]

Kavli Affiliate: Anthony Challinor | First 5 Authors: Carmen Embil Villagra, Carmen Embil Villagra, , , | Summary: We measure the amplitude of matter fluctuations over a wide range of redshifts by combining CMB lensing observations from ACT DR6 and $textitPlanck$ PR4 with the overdensity of quasars from Quaia, a $textitGaia$ and $textitunWISE$ quasar catalog. […]

Kavli Affiliate: Roberto Maiolino | First 5 Authors: William McClymont, William McClymont, , , | Summary: We present an analysis of metallicities and chemical abundances at $3<z<12$ in the THESAN-ZOOM simulations. We find that smoothly curved gas-phase and stellar mass-metallicity relations (MZR) are already in place at $zapprox12$ and evolve slowly ($sim$0.2 dex increase for […]

Kavli Affiliate: Blake Sherwin | First 5 Authors: Boris Bolliet, Boris Bolliet, , , | Summary: These notes are very much work-in-progress and simply intended to showcase, in various degrees of details (and rigour), some of the cosmology calculations that class_sz can do. We describe the class_sz code in C, Python and Jax. Based on […]

Kavli Affiliate: Blake Sherwin | First 5 Authors: Boris Bolliet, Boris Bolliet, , , | Summary: These notes are very much work-in-progress and simply intended to showcase, in various degrees of details (and rigour), some of the cosmology calculations that class_sz can do. We describe the class_sz code in C, Python and Jax. Based on […]

Kavli Affiliate: Blake Sherwin | First 5 Authors: Licong Xu, Licong Xu, , , | Summary: We present a multi-agent system for automation of scientific research tasks, cmbagent (https://github.com/CMBAgents/cmbagent). The system is formed by about 30 Large Language Model (LLM) agents and implements a Planning & Control strategy to orchestrate the agentic workflow, with no […]

Kavli Affiliate: Debora Sijacki | First 5 Authors: Callum Witten, Callum Witten, , , | Summary: Protoclusters represent the most extreme environments in the very early Universe. They form from large-scale dark matter overdensities, harbouring an overabundance of galaxies fed by large gas reservoirs. Their early and accelerated evolution results in a distinct difference in […]