The nearby star-forming dwarf galaxy Sextans A offers a unique window into galaxy evolution in the early Universe, owing to its extremely low metallicity (∼0.01─0.07 Z ⊙). Recent JWST imaging of Sextans A spanning 1─21 μm enables a detailed characterization of its dusty stellar populations and interstellar medium. In this work, we compare the

Context. Recovering the star formation and chemical enrichment histories of galaxies is essential for understanding the physical processes that govern their formation and evolution. Classical full spectral fitting techniques have enabled major advances in this field, but the inversion problem remains highly degenerate, particularly when the

Context. Flat spectrum radio quasars (FSRQs) often remain undetected at very-high-energy (VHE, E > 100 GeV) γ rays due to their typically soft spectra and large distance. In December 2023, the Large-Sized Telescope prototype (LST-1) detected for the first time VHE γ-ray emission from the FSRQ OP 313 during an extraordinarily bright flare, becoming

We present soft X-ray spectroscopy of the black-hole X-ray binary V4641 Sgr with the XMM-Newton Reflection Grating Spectrometer (RGS). The RGS spectrum shows narrow emission features from N VI─VII and O VII─VIII superimposed on a partially covered disc blackbody continuum. A blind Gaussian search confirms the presence of significant lines at the

Galaxy mergers are a central driver of galaxy evolution across cosmic time, and thus, quantifying their frequency is critical for constraining hierarchical models of galaxy formation. Motivated by the need to robustly quantify these fractions and their evolution, we build on our previous close-pair analysis by exploring morphological identification