Possible correlation between unabsorbed hard X-rays and neutrinos in radio-loud and radio-quiet AGN
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| Format: | Preprint |
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2024
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| author | Kun, Emma Bartos, Imre Tjus, Julia Becker Biermann, Peter L. Franckowiak, Anna Halzen, Francis del Palacio, Santiago Woo, Jooyun |
| author_facet | Kun, Emma Bartos, Imre Tjus, Julia Becker Biermann, Peter L. Franckowiak, Anna Halzen, Francis del Palacio, Santiago Woo, Jooyun |
| contents | The first high-energy neutrino source identified by IceCube was a blazar -- an active galactic nucleus driving a relativistic jet towards Earth. Jets driven by accreting black holes are commonly assumed to be needed for high-energy neutrino production. Recently, IceCube discovered neutrinos from Seyfert galaxies, which appears unrelated to jet activity. Here, we show that the observed luminosity ratios of neutrinos and hard X-rays from blazars TXS 0506+056 and GB6 J1542+6129 are consistent with neutrino production in a $γ$-obscured region near a central supermassive black hole, with the X-ray flux corresponding to reprocessed $γ$-ray emission with flux comparable to that of neutrinos. Similar neutrino - hard X-ray flux ratios are found for four Seyfert galaxies, NGC 1068, NGC 4151, CGCG 420-015 and NGC 3079, raising the possibility of a common neutrino production mechanism that may not involve a strong jet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_06867 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Possible correlation between unabsorbed hard X-rays and neutrinos in radio-loud and radio-quiet AGN Kun, Emma Bartos, Imre Tjus, Julia Becker Biermann, Peter L. Franckowiak, Anna Halzen, Francis del Palacio, Santiago Woo, Jooyun High Energy Astrophysical Phenomena The first high-energy neutrino source identified by IceCube was a blazar -- an active galactic nucleus driving a relativistic jet towards Earth. Jets driven by accreting black holes are commonly assumed to be needed for high-energy neutrino production. Recently, IceCube discovered neutrinos from Seyfert galaxies, which appears unrelated to jet activity. Here, we show that the observed luminosity ratios of neutrinos and hard X-rays from blazars TXS 0506+056 and GB6 J1542+6129 are consistent with neutrino production in a $γ$-obscured region near a central supermassive black hole, with the X-ray flux corresponding to reprocessed $γ$-ray emission with flux comparable to that of neutrinos. Similar neutrino - hard X-ray flux ratios are found for four Seyfert galaxies, NGC 1068, NGC 4151, CGCG 420-015 and NGC 3079, raising the possibility of a common neutrino production mechanism that may not involve a strong jet. |
| title | Possible correlation between unabsorbed hard X-rays and neutrinos in radio-loud and radio-quiet AGN |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.06867 |