Investigating the Properties of the Relativistic Jet and Hot Corona in AGN with X-ray Polarimetry
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2024
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| author | Kim, Dawoon E. Di Gesu, Laura Marin, Frédéric Marscher, Alan P. Matt, Giorgio Soffitta, Paolo Tombesi, Francesco Costa, Enrico Donnarumma, Immacolata |
| author_facet | Kim, Dawoon E. Di Gesu, Laura Marin, Frédéric Marscher, Alan P. Matt, Giorgio Soffitta, Paolo Tombesi, Francesco Costa, Enrico Donnarumma, Immacolata |
| contents | X-ray polarimetry has been suggested as a prominent tool for investigating the geometrical and physical properties of the emissions from active galactic nuclei (AGN). The successful launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 9 December 2021 has expanded the previously restricted scope of polarimetry into the X-ray domain, enabling X-ray polarimetric studies of AGN. Over a span of two years, IXPE has observed various AGN populations, including blazars and radio-quiet AGN. In this paper, we summarize the remarkable discoveries achieved thanks to the opening of the new window of X-ray polarimetry of AGN through IXPE observations. We will delve into two primary areas of interest: first, the magnetic field geometry and particle acceleration mechanisms in the jets of radio-loud AGN, such as blazars, where the relativistic acceleration process dominates the spectral energy distribution; and second, the geometry of the hot corona in radio-quiet AGN. Thus far, the IXPE results from blazars favor the energy-stratified shock acceleration model, and they provide evidence of helical magnetic fields inside the jet. Concerning the corona geometry, the IXPE results are consistent with a disk-originated slab-like or wedge-like shape, as could result from Comptonization around the accretion disk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_14200 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Investigating the Properties of the Relativistic Jet and Hot Corona in AGN with X-ray Polarimetry Kim, Dawoon E. Di Gesu, Laura Marin, Frédéric Marscher, Alan P. Matt, Giorgio Soffitta, Paolo Tombesi, Francesco Costa, Enrico Donnarumma, Immacolata High Energy Astrophysical Phenomena X-ray polarimetry has been suggested as a prominent tool for investigating the geometrical and physical properties of the emissions from active galactic nuclei (AGN). The successful launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 9 December 2021 has expanded the previously restricted scope of polarimetry into the X-ray domain, enabling X-ray polarimetric studies of AGN. Over a span of two years, IXPE has observed various AGN populations, including blazars and radio-quiet AGN. In this paper, we summarize the remarkable discoveries achieved thanks to the opening of the new window of X-ray polarimetry of AGN through IXPE observations. We will delve into two primary areas of interest: first, the magnetic field geometry and particle acceleration mechanisms in the jets of radio-loud AGN, such as blazars, where the relativistic acceleration process dominates the spectral energy distribution; and second, the geometry of the hot corona in radio-quiet AGN. Thus far, the IXPE results from blazars favor the energy-stratified shock acceleration model, and they provide evidence of helical magnetic fields inside the jet. Concerning the corona geometry, the IXPE results are consistent with a disk-originated slab-like or wedge-like shape, as could result from Comptonization around the accretion disk. |
| title | Investigating the Properties of the Relativistic Jet and Hot Corona in AGN with X-ray Polarimetry |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.14200 |