Ulugh Beg Astronomical Institute

Extreme-Tail Radial Differentiation in HST Chromosome Maps of Galactic Globular Clusters: A Link to Central Structural State

Chromosome maps (ChMs) reveal multiple stellar populations in globular clusters (GCs), but radial trends can depend on how overlapping structures are partitioned. We analyse 56 Galactic GCs with Hubble Space Telescope UV Globular Cluster Survey (HUGS) photometry, separating the s...

Hawking Radiation from Non-minimal Einstein--Yang--Mills Black Holes

Abstract We study Hawking emission from the regular magnetic black hole of non-minimal Einstein--Yang--Mills theory. The geometry is supported by a Wu--Yang charge whose Yang--Mills field couples directly to curvature through the non-minimal susceptibility tensor. This coupling r...

Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification

Abstract We present a multiwavelength study of the long-duration gamma-ray burst GRB 230328B, combining prompt γ-ray observations with exceptionally early simultaneous optical photometry and extensive X-ray, radio, and host-galaxy follow-up. NUTTELA-TAO began simultaneous g′r′i′...