Spatially resolved polarization variation of the Crab Nebula

Abstract

We examined the spatially resolved polarization variations in the Crab Nebula over 2 yr, using observational data from the Imaging X-ray Polarimetry Explorer, and offer key insights into its magnetic field structures and evolution. The results show significant temporal changes in the polarization degree (PD) across three regions of interest in the 2-8 keV energy band. Regions (a) and (b), located in the northern and the southwestern parts of the study area, exhibit PD variations with significance levels greater than 4 sigma and 3 sigma , respectively. Region (c), located in the southwest,shows a notable decrease in PD with a significance greater than 5 sigma. However, no significant variation in the polarization angle was observed. Meanwhile, notable flux variations were detected, likely influenced by dynamic processes such as magnetized turbulence within the nebula.

References in corpus (12)

• Analyzing the Data from X-ray Polarimeters with Stokes Parameters
• When A Standard Candle Flickers
• Design, Construction, and Test of the Gas Pixel Detectors for the IXPE Mission
• Handling Background in IXPE polarimetric data
• A weighted analysis to improve the X-ray polarization sensitivity of IXPE
• Re-detection and a Possible Time Variation of Soft X-ray Polarisation from the Crab
• Deep Chandra Observation of the Pulsar Wind Nebula Powered by the Pulsar J1846-0258 in the Supernova Remnant Kes 75
• Vela pulsar wind nebula x-rays are polarized to near the synchrotron limit
• X-ray Phase-Resolved Spectroscopy of PSRs B0531+21, B1509-58, and B0540-69 with RXTE
• New X-ray observations of the Geminga pulsar wind nebula
• Turbulent model of Crab nebula radiation
• Polarisation Leakage due to Errors in Track Reconstruction in Gas Pixel Detectors