Abstract Details
| Name: Athira M Bharathan Affiliation: CHRIST (Deemed to be University) Conference ID: ASI2025_436 Title : Probing High-Energy Emission Mechanisms in Blazars through X-ray Polarization with IXPE Authors and Co-Authors : 1: Athira M Bharathan Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, India. Abstract Type : Oral Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : The spectral energy distribution (SED) of blazars typically exhibits a characteristic double-peak structure, with a low-energy peak from synchrotron radiation emitted by relativistic particles within the jet and a high-energy peak from inverse Compton scattering. In BL Lacertae (BLL) objects, the X-ray emission generally lies within the high-energy tail of the synchrotron component, whereas in Flat Spectrum Radio Quasars (FSRQs), it is situated in the low-energy segment of the inverse Compton component. These contrasting locations allow X-ray polarization measurements to provide insights into particle acceleration processes within the jets of these blazar types. In this study, we analyze observations of several blazars by NASA’s Imaging X-ray Polarimetry Explorer (IXPE), detecting significant polarization in Mrk 421, 1ES 1959+650, and PKS 2155-304, while no X-ray polarization was detected for 3C 454.3. Through polarization analysis, we explore the structure and properties of the high-energy emission regions and examine the differing polarization behaviors between FSRQ and BLL sources, shedding light on distinctions between leptonic and hadronic models of blazar emission. |