Abstract Details
| Name: Muhammed saleem Affiliation: IISER Trivandrum Conference ID: ASI2018_1390 Title : Short-GRB afterglows in coincidence with gravitational waves from Binary Neutron Star mergers Authors and Co-Authors : L Resmi, Kuntal Misra, Archana Pai and KG Arun Abstract Type : Contributed Talk Abstract Category : Extragalactic astronomy Abstract : The joint detection of GW170817 and GRB170817A gave the first ever direct evidence for the BNS merger as the progenitor of short Gamma Ray Bursts (SGRBs). Due to the beamed gamma ray emission and short duration, a fraction of SGRBs are likely to be not detected. SGRB afterglow emission is due to an interaction of the jet with the surrounding medium. The afterglow is expected to last for several days and months in various electromagnetic (EM) bands. This makes them potential targets for EM follow up observations of observed GW merger events. Assuming a uniform top hat jet model, an afterglow light curve can be characterized by a 8-dimensional afterglow parameter space which includes source and observer dependent parameters. Using BoxFit hydrodynamic simulation package, we construct a population of afterglow light curves in X-ray, optical and radio bands which are representative of the EM counterparts of the BNS mergers detected by 3 and 5-detector networks of ground based GW detectors in their designed sensitivity. With this population, for the current and future EM facilities, we identify parameter space regions which are required to produce various detection/non-detection scenarios. Further, combining with the BNS merger rates estimated from LIGO-Virgo observation runs, we estimate the number of afterglow detections per year and investigate various physical and observational factors which affect the detection rates. |