3 papers
physics.plasm-ph2025
Extended temporal coarse-graining in a stratified and confined plasma under thermal fluctuations
Luca Barbieri, Simone Landi, Lapo Casetti +1
We present an extended investigation of a recently introduced model of gravitationally confined, collisionless plasma (Barbieri et al. 2024a), which showed that rapid temperature f…
astro-ph.GA2025
Low-Eddington ratio, changing-look active galactic nuclei: the case of NGC 4614
Elisabeta Lusso, Lapo Casetti, Marco Romoli +27
Active galactic nuclei (AGN) are known to be variable sources across the entire electromagnetic spectrum, in particular at optical/ultraviolet and X-ray energies. Over the past dec…
astro-ph.SR2024
Temperature and density profiles in the corona of main-sequence stars induced by stochastic heating in the chromosphere
Luca Barbieri, Lapo Casetti, Andrea Verdini +1
All but the most massive main-sequence stars are expected to have a rarefied and hot (million-Kelvin) corona like the Sun. How such a hot corona is formed and supported has not bee…