Institution
Nicolaus Copernicus Astronomical Center
Recent research
- Physics & SpaceOpen access
Red novae, their progenitors, and remnants
Abstract Red novae or luminous red novae are a class of optical transients that have emerged over the past two decades. They occupy an intermediate-luminosity regime between classical novae and supernovae and are characterized by cool, slowly expanding ejecta and a pronounced evo...
- Materials & EnergyOpen access
Construction and characterisation of the DarkSide-20k veto silicon photo-multiplier tiles
Abstract Silicon photo-multipliers (SiPMs) are state-of-the-art sensors capable of detecting a single photoelectron under cryogenic conditions, with potentially lower radioactivity than widely used photomultiplier tubes. The DarkSide-20k experiment, designed to perform direct dar...
- Physics & SpaceOpen access
Are jet speeds governed by accretion modes?
Abstract Relativistic jets are observed in both stellar-mass black hole X-ray binaries (BHXRBs) and active galactic nuclei (AGNs), yet their bulk Lorentz factors differ systematically—those in black hole X-ray binaries are typically below ~2, whereas AGN jets can reach ~50. The o...