Context. Advances in data-constrained and data-driven simulations have shed light on the initiation of solar eruptions. These models incorporate observed photospheric magnetic fields. However, because we lack information about the magnetic field in the rest of the solar atmosphere, models rely on extrapolations that, in most cases, neglect the

Extremely high-peaked BL Lac objects—also named extreme blazars—are among the most energetic and persistent extragalactic accelerators in the Universe, defined by a synchrotron emission peaking above 10 17 Hz in X-rays. Such emission is then reprocessed and produces radiation extending deeply into very-high-energy (VHE; energy E > 100 GeV) gamma

Reconstruction of the baryon acoustic oscillation (BAO) signal has been a standard procedure in BAO analyses over the past decade and has helped to improve the BAO parameter precision by a factor of ∼2 on average. The Dark Energy Spectroscopic Instrument (DESI) BAO analysis for the first year (DR1) data uses the "standard" reconstruction framework

Merging luminous galaxies are ideal laboratories for studying some of the most extreme astrophysical phenomena. The local (z = 0.1232) obscured quasar J1356+1026 has two nuclei, North and South (J1356N and J1356S), but despite numerous efforts, J1356S had not yet been confirmed as an AGN. Based on the superb sensitivity and spatial resolution of

Polarization at millimeter wavelengths provides a powerful diagnostic of dust grain properties in protoplanetary disks. Standard models based on solid spherical grains often struggle to reproduce the observed polarization fractions and morphologies in systems where self-scattering is expected to dominate. We investigate the impact of grain

Context. The performance of the Euclid system is defined in terms of image quality metrics tuned to the weak gravitational lensing cosmological probe. The weak lensing measurement induces stringent requirements on the shape and stability of the VIS instrument system point spread function (PSF). The PSF is affected by error contributions from the