Comparison between the Emission Torus and the Measured Toroidal Magnetic Field for the Crab and Vela Nebulae
Abstract Polarization measurements provide insight into the magnetic field, a critical aspect of the dynamics and emission properties around the compact object. In this paper, we present the polarized magnetic field of the Crab outer torus and the Vela arc utilizing Imaging X-ray Polarimetry Explorer observation data. The polarization angle (PA) measured for the Crab outer torus exhibits two monotonic evolutions along the azimuth angle, which are consistent with the normal line of the elliptical ring. There is a slight increase in PA along the azimuth angle for both the inner arc and the outer arc of the Vela Nebula. The polarized magnetic vector along the outer torus of the Crab Nebula shows the polarized magnetic field aligns with the Crab outer torus structure. The PA variation along the Crab outer torus suggests a bulk flow speed of 0.8 c . Meanwhile, the Vela Nebula polarized magnetic field does not exactly align with the Vela arc structure. We noted that the Crab Nebula possesses a polarized toroidal magnetic field, whereas the Vela Nebula exhibits an incomplete toroidal magnetic field.
Authors
- Y. L. Tuo (ORCID: https://orcid.org/0000-0003-3127-0110)
- Mingyu Ge (ORCID: https://orcid.org/0000-0002-3776-4536)
- Kuan Liu (ORCID: https://orcid.org/0009-0007-8686-9012)
- En‐Wei Liang (ORCID: https://orcid.org/0000-0002-7044-733X)
- Alessandro Di Marco (ORCID: https://orcid.org/0000-0003-0331-3259)
- Fei Xie (ORCID: https://orcid.org/0000-0002-0105-5826)
- Wei Deng (ORCID: https://orcid.org/0000-0002-9370-4079)
- Fabio La Monaca (ORCID: https://orcid.org/0000-0001-8916-4156)
Institutions
- University of Rome Tor Vergata (IT)
- Guangxi University (CN)
- Chinese Academy of Sciences (CN)
- Institute for Space Astrophysics and Planetology (IT)
- Institute of High Energy Physics (CN)
- University of Tübingen (DE)
- Sapienza University of Rome (IT)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2024-11-01
- DOI
- https://doi.org/10.3847/1538-4357/ad8638
- Citations
- 2
- Primary Topic
- Solar and Space Plasma Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 0.66
Funders
- National Aeronautics and Space Administration
- National Natural Science Foundation of China
- Agenzia Spaziale Italiana
- Istituto Nazionale di Astrofisica
- Ministero degli Affari Esteri e della Cooperazione Internazionale
- Marshall Space Flight Center
- Goddard Space Flight Center
- National Key Research and Development Program of China