Abstract Details
| Name: Dr Surajit Paul Affiliation: Department of Physics, SP Pune University Conference ID: ASI2015_751 Title : Galaxy Cluster merger blast wave, an engine of Cosmic Ray production Authors and Co-Authors : Luigi Iapichino (Leibniz-Rechenzentrum, Garching, Germany); R. S. John (Pondichery University); G. D. Harale (Pune University) Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : Explosions play very important role in the formation or emergence of many astrophysical systems. Immediate result of an explosion is the blast wave formation. In astrophysics, Supernovae explosions are the ideal example of such events. But, huge energy can even be released in much larger gravitational collapse like galaxies and clusters of galaxies, especially during their mergers. To study the dynamics and energetics of such events, we used ENZO-2.1 hydrodynamic code to study massive galaxy cluster merger phenomena. It is observed in our study that the formation of Mega parsec scale merger shocks in such events substantially change the energy distribution of Inter Cluster Medium. A striking similarity is noticed between expanding intra cluster medium during mergers with the blast wave formation in supernovae explosions. This study of ours thus reporting the largest known blast wave in this universe with an extension greater than 1 Mpc. Such a gigantic shock wave also act as the particle accelerator that can accelerate particles to an energy as high as ~ 10^19 eV, the highest energy detected in this universe. Lastly, we found that such explosions help to re-populate and re-energize the voids which is extremely important finding as such events might be in conflict with the statistical expectations of the CDM model. |