Abstract
If γ -ray bursts (GRBs) are associated with dense star-forming regions, photoelectric absorption by the circumburster material (CBM) will occur. As the burst evolves, the surrounding material is photoionized, leading to fluorescence line emission and reduced photoelectric absorption opacity. We have numerically simulated this problem, accounting for all relevant microscopic processes. We find that if GRBs are hosted in a quasi-isotropic surrounding medium, photoionization of the CBM leads to a constant but weak level of delayed fluorescence line emission on timescales of weeks to months after the GRB. A temporally evolving Fe K edge absorption feature can serve as diagnostic tool for redshift measurements.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
