Re-detection and a Possible Time Variation of Soft X-ray Polarisation from the Crab
arXiv:2011.05487 · doi:10.1038/s41550-020-1088-1
Abstract
The Crab nebula is so far the only celestial object with a statistically significant detection in soft x-ray polarimetry, a window that has not been explored in astronomy since the 1970s. However, soft x-ray polarimetry is expected to be a sensitive probe of magnetic fields in high energy astrophysical objects including rotation-powered pulsars and pulsar wind nebulae. Here we report the re-detection of soft x-ray polarisation after 40 years from the Crab nebula and pulsar with PolarLight, a miniature polarimeter utilising a novel technique onboard a CubeSat. The polarisation fraction of the Crab in the on-pulse phases was observed to decrease after a glitch of the Crab pulsar on July 23, 2019, while that of the pure nebular emission remained constant within uncertainty. The phenomenon may have lasted about 100 days. If the association between the glitch and polarisation change can be confirmed with future observations, it will place strong constraints on the physical mechanism of the high energy emission and glitch of pulsars.
arXiv commentAuthors' version of an article published in Nature Astronomy on 11 May 2020. Link to the paper: https://www.nature.com/articles/s41550-020-1088-1
References in corpus (20)
- An efficient photoelectric X-ray Polarimeter for the study of Black Holes and Neutron Stars
- The enhanced X-ray Timing and Polarimetry mission - eXTP
- Neutron star magnetic field evolution, crust movement and glitches
- High-Altitude Particle Acceleration and Radiation in Pulsar Slot Gaps
- Analyzing the Data from X-ray Polarimeters with Stokes Parameters
- Toward a Realistic Pulsar Magnetosphere
- XIPE: the X-ray Imaging Polarimetry Explorer
- Crab: the standard X-ray candle with all (modern) X-ray satellites
- Observations of a Series of Six Recent Glitches in the Crab Pulsar
- Pulse Profiles, Spectra and Polarization Characteristics of Non-Thermal Emissions from the Crab-Like Pulsars
- PolarLight: a CubeSat X-ray Polarimeter based on the Gas Pixel Detector
- Relativistic effects and polarization in three high-energy pulsar models
- Spectral and polarimetric characterization of the Gas Pixel Detector filled with dimethyl ether
- Multiwavelength Polarization of Rotation-Powered Pulsars
- Point and Interval Estimation on the Degree and the Angle of Polarization. A Bayesian approach
- Modeling the effect of small-scale magnetic turbulence on the X-ray properties of Pulsar Wind Nebulae
- The PoGO+ view on Crab off-pulse hard X-ray polarisation
- The Halo Occupation Distribution of Obscured Quasars: Revisiting the Unification Model
- Pitfalls of statistics-limited X-ray polarization analysis
- Assembly and Test of the Gas Pixel Detector for X-ray Polarimetry
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- Design, Construction, and Test of the Gas Pixel Detectors for the IXPE Mission
- Vela pulsar wind nebula x-rays are polarized to near the synchrotron limit
- An algorithm to calibrate and correct the response to unpolarized radiation of the X-ray polarimeter on board IXPE
- Return of the Big Glitcher: NICER timing and glitches of PSR J0537-6910
- X-ray polarimetry of the Crab nebula with PolarLight: polarization recovery after the glitch and a secular position angle variation
- Polarisation of Accreting X-ray Pulsars. II. Hercules X-1
- An In Situ Study of Turbulence Near Stellar Bow Shocks
- A Study of background for IXPE
- Pulsar glitches in a strangeon star model. II. The activity
- Optimization of Timepix3-based conventional Compton camera using electron track algorithm
- Phenomenological modelling of the Crab Nebula's broad band energy spectrum and its apparent extension
- In-orbit Operation and Performance of the CubeSat Soft X-ray Polarimeter PolarLight
- Quakes of Compact Stars
- Revisiting the post-glitch relaxation of the 2000 Vela glitch with the neutron star equation of states in the Brueckner and relativistic Brueckner theories
- Gamma-Ray Polarimetry of the Crab Pulsar Observed by POLAR
- Polarization Signals from Axion-Photon Resonant Conversion in Neutron Star Magnetosphere
- Pulsar Glitch in a Strangeon Star Model. III. The recovery
- Exploration of the polarization angle variability of the Crab Nebula with POLARBEAR and its application to the search for axion-like particles
- X-ray Polarimetry of the accreting pulsar 1A~0535+262 in the supercritical state with PolarLight
- Discrimination of background events in the PolarLight X-ray polarimeter
- Modeling the in-orbit background of PolarLight
- Feasibility of Observing Gamma-ray Polarization from Cygnus X-1 Using a CubeSat
- Analysis of the data from photoelectric gas polarimeters
- Crab Pulsar: IXPE Observations Reveal Unified Polarization Properties Across Optical and Soft X-Ray Bands
- XL-Calibur measurements of polarised hard X-ray emission from the Crab
- The Instrument of the Imaging X-ray Polarimetry Explorer
- Glitches in four gamma-ray pulsars and inferences on the neutron star structure
- Spatially resolved polarization variation of the Crab Nebula
- General History of X-Ray Polarimetry in Astrophysics
- Simulation of a Xe-based X-ray Polarimeter at 10-30 keV
- Hard X-ray Polarimetry -- An overview of the method, science drivers and recent findings
- The HaloSat and PolarLight CubeSat Missions for X-ray Astrophysics
- A significant detection of X-ray Polarization in Sco X-1 with PolarLight and constraints on the corona geometry
- Instruments for Focal Plane X-Ray Polarimetry in the Next Decade
- Performance of the X-Calibur Hard X-Ray Polarimetry Mission during its 2018/19 Long-Duration Balloon Flight
- In-flight calibration of the INTEGRAL/IBIS Compton mode: Application to the Crab Nebula polarization