Comparison between the emission torus and the measured toroidal magnetic field for the Crab and Vela nebula

Autor:	Deng, Wei, Xie, Fei, Liu, Kuan, Ge, Mingyu, Tuo, Youli, La Monaca, Fabio, Di Marco, Alessandro, Liang, En-wei
Rok vydání:	2024
Předmět:	Astrophysics - Solar and Stellar Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics - High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	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 Crab outer torus structure. The PA variation along the Crab outer torus suggests a bulk flow speed of 0.8c. 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, where as the Vela nebula exhibits an incomplete toroidal magnetic field. Comment: 8 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2410.05622 Zobrazit plný text záznamu View this record from Arxiv