Unveiling the nitrogen-rich massive star in the metal-poor galaxy NGC 4068

0567532 - ASÚ 2024 RIV GB eng J - Článek v odborném periodiku
Yarovova, A. D. - Egorov, O. - Moiseev, A. V. - Maryeva, Olga
Unveiling the nitrogen-rich massive star in the metal-poor galaxy NGC 4068.
Monthly Notices of the Royal Astronomical Society. Roč. 518, č. 2 (2023), s. 2256-2272. ISSN 0035-8711. E-ISSN 1365-2966
Institucionální podpora: RVO:67985815
Klíčová slova: massive stars * Wolf rayet * abundances galaxies
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 4.8, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1093/mnras/stac2949

We present a detailed prompt emission and early optical afterglow analysis of the two very-high-energy (VHE) detected bursts GRB 201015A and GRB 201216C, and their comparison with a subset of similar bursts. Time-resolved spectral analysis of multistructured GRB 201216C using the Bayesian binning algorithm revealed that during the entire duration of the burst, the low-energy spectral index (α pt) remained below the limit of the synchrotron line of death. However, statistically some of the bins supported the additional thermal component. Additionally, the evolution of spectral parameters showed that both the peak energy (E p) and α pt tracked the flux. These results were further strengthened using the values of the physical parameters obtained by synchrotron modeling of the data.
Trvalý link: https://hdl.handle.net/11104/0341983