Radio Observation of the Pulsar Wind Nebula in SNR G11.2-0.3
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866916641055440896 |
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| author | Zhang, Yu Liu, Yihan Ng, C. -Y. Roberts, Mallory S. E. Yang, Lili |
| author_facet | Zhang, Yu Liu, Yihan Ng, C. -Y. Roberts, Mallory S. E. Yang, Lili |
| contents | Pulsar wind nebulae (PWNe) are important sources for understanding galactic high-energy processes, but it is controversial until now about how high-energy particles in PWNe are accelerated and transported. Lacking radio counterparts of X-ray PWNe (the proposed acceleration sites) introduce difficulties to better understandings in multi wavelengths. Our recent 3, 6, and 16\,cm high-resolution observations of G11.2$-$0.3 PWN with the Australia Telescope Compact Array (ATCA) uniquely show morphological similarity with its X-ray PWN (a torus/jet feature). Spectral indices of the radio torus and jet are around -0.09 and -0.10, respectively. Meanwhile for the jet region, the spectral break between radio and X-ray spectra implies particle acceleration mechanisms other than a diffusive shock acceleration. Polarization results suggest a helical B-field inside the jet, the equipartition B-field strength of which is below 100\,$μ$G. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01802 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Radio Observation of the Pulsar Wind Nebula in SNR G11.2-0.3 Zhang, Yu Liu, Yihan Ng, C. -Y. Roberts, Mallory S. E. Yang, Lili High Energy Astrophysical Phenomena Pulsar wind nebulae (PWNe) are important sources for understanding galactic high-energy processes, but it is controversial until now about how high-energy particles in PWNe are accelerated and transported. Lacking radio counterparts of X-ray PWNe (the proposed acceleration sites) introduce difficulties to better understandings in multi wavelengths. Our recent 3, 6, and 16\,cm high-resolution observations of G11.2$-$0.3 PWN with the Australia Telescope Compact Array (ATCA) uniquely show morphological similarity with its X-ray PWN (a torus/jet feature). Spectral indices of the radio torus and jet are around -0.09 and -0.10, respectively. Meanwhile for the jet region, the spectral break between radio and X-ray spectra implies particle acceleration mechanisms other than a diffusive shock acceleration. Polarization results suggest a helical B-field inside the jet, the equipartition B-field strength of which is below 100\,$μ$G. |
| title | Radio Observation of the Pulsar Wind Nebula in SNR G11.2-0.3 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2503.01802 |