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astro-ph.HE2026
Study of the Ultra-Long GRB 220627A: Exploring a Possible Blue Supergiant Collapsar Origin
Ayush Garg, Amit Shukla, Dorottya Szécsi +1
Ultra-long gamma-ray bursts (ul-GRBs) challenge standard collapsar models because their extreme durations require central engines active for s. While the prompt…
astro-ph.SR2026
Spectral characteristics of fast rotating metal-poor massive stars
Brankica Kubátová, Dorottya Szécsi
Low-metallicity massive stars are assumed to be progenitors of certain supernovae, gamma-ray bursts, and gravitational wave emitting mergers. These exotic phenomena contribute to t…