Abstract Details
| Name: Rupak Roy Affiliation: Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India Conference ID: ASI2025_555 Title : Asymmetry in superluminous supernovae Authors and Co-Authors : Rupak Roy Abstract Type : Poster Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : Supernovae (SNe) are catastrophic explosions through which massive stars die. Considering the progenitors' initial angular momentum and the geometry of the early neutrino-burst, one may expect these explosions to be asymmetric to some extent. Moreover, signatures of this asymmetry are expected to be imprinted in the geometry of the ejected material as well. Observationally this can be probed through spectropolarimetry. The Hydrogen deficit superluminous supernovae (SLSN-I), which are 10-100 times more luminous than normal SNe, should be more asymmetric. Investigation of such systems through spectropolarimetry will help us to understand the asphericity in SLSNe, and how the nature of asymmetry varies in different types of stellar explosions from low-mass progenitor stars to high-mass progenitors. Here I will present the results of spectropolarimetric observations of three SLSN-I - namely SNe 2018bsz, 2018ibb, 2019szu. These events are unique as it was proposed that they originated from different physical processes (SNe 2018bsz, 2019szu are from due to spin-down Magnetar / CSM interaction, while SN2018ibb is from the pair-instability process). On the basis of polarization data, I will discuss the possible physical processes that may have produced these SLSNe. Here I will also compare the polarization of these events with that of other SLSNe, hydrogen-deficit SNe, and Gamma-Ray Bursts (GRBs) to get a more generalized picture of asymmetry in stellar explosions. |