The Search for Nuclear Isomers in Neutron Star Mergers Using GRBs
POSTER
Abstract
The observation of the binary neutron star merger GW170817A, marked by both gravitational waves and electromagnetic signals, including the gamma-ray burst GRB 170817A, presents a unique opportunity to study these astrophysical events. The gamma-ray spectrum of GRB 170817A features two distinct components: a hard short pulse followed by a softer thermal emission, with the origin of the hard pulse still widely debated. Our research explores the hypothesis that gamma-ray de-excitations from isomeric transitions contribute to this spectral feature. By establishing a selection criterion for isomers based on solar element abundances, we aim to match the observed GRB spectral characteristics. An interactive, python based webpage has been developed to display gamma-ray spectra from key isomers, enhancing our understanding of nuclear processes in cosmic events. This study not only sheds light on the intricate mechanisms behind gamma-ray bursts but also contributes valuable insights to the field of astrophysics.
Publication: Maria C. Babiuc Hamilton and Joseph I. Powell, "Signatures of Nuclear Isomers in Gamma-Ray Bursts from Binary Neutron Star Mergers" preprint: https://arxiv.org/abs/2402.06498, submitted to: Frontiers in Astronomy and Space Sciences, section Cosmology, manuscript ID: 1384488
Presenters
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Joseph I Powell
Marshall University
Authors
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Joseph I Powell
Marshall University
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Maria C Hamilton
Marshall University, Huntington, WV