Constraints on neutrino natal kicks from black-hole binary VFTS 243
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866913294432862208 |
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| author | Vigna-Gómez, Alejandro Willcox, Reinhold Tamborra, Irene Mandel, Ilya Renzo, Mathieu Wagg, Tom Janka, Hans-Thomas Kresse, Daniel Bodensteiner, Julia Shenar, Tomer Tauris, Thomas M. |
| author_facet | Vigna-Gómez, Alejandro Willcox, Reinhold Tamborra, Irene Mandel, Ilya Renzo, Mathieu Wagg, Tom Janka, Hans-Thomas Kresse, Daniel Bodensteiner, Julia Shenar, Tomer Tauris, Thomas M. |
| contents | The recently reported observation of VFTS 243 is the first example of a massive black-hole binary system with negligible binary interaction following black-hole formation. The black-hole mass ($\approx 10\ M_{\odot}$) and near-circular orbit ($e\approx 0.02$) of VFTS 243 suggest that the progenitor star experienced complete collapse, with energy-momentum being lost predominantly through neutrinos. VFTS 243 enables us to constrain the natal kick and neutrino-emission asymmetry during black-hole formation. At 68% C.L., the natal kick velocity (mass decrement) is $\lesssim 10$ km/s ($\lesssim 1.0\ M_{\odot}$), with a full probability distribution that peaks when $\approx 0.3\ M_{\odot}$ were ejected, presumably in neutrinos, and the black hole experienced a natal kick of $4$ km/s. The neutrino-emission asymmetry is $\lesssim 4$%, with best fit values of $\sim$0-0.2%. Such a small neutrino natal kick accompanying black-hole formation is in agreement with theoretical predictions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2310_01509 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraints on neutrino natal kicks from black-hole binary VFTS 243 Vigna-Gómez, Alejandro Willcox, Reinhold Tamborra, Irene Mandel, Ilya Renzo, Mathieu Wagg, Tom Janka, Hans-Thomas Kresse, Daniel Bodensteiner, Julia Shenar, Tomer Tauris, Thomas M. High Energy Astrophysical Phenomena Solar and Stellar Astrophysics The recently reported observation of VFTS 243 is the first example of a massive black-hole binary system with negligible binary interaction following black-hole formation. The black-hole mass ($\approx 10\ M_{\odot}$) and near-circular orbit ($e\approx 0.02$) of VFTS 243 suggest that the progenitor star experienced complete collapse, with energy-momentum being lost predominantly through neutrinos. VFTS 243 enables us to constrain the natal kick and neutrino-emission asymmetry during black-hole formation. At 68% C.L., the natal kick velocity (mass decrement) is $\lesssim 10$ km/s ($\lesssim 1.0\ M_{\odot}$), with a full probability distribution that peaks when $\approx 0.3\ M_{\odot}$ were ejected, presumably in neutrinos, and the black hole experienced a natal kick of $4$ km/s. The neutrino-emission asymmetry is $\lesssim 4$%, with best fit values of $\sim$0-0.2%. Such a small neutrino natal kick accompanying black-hole formation is in agreement with theoretical predictions. |
| title | Constraints on neutrino natal kicks from black-hole binary VFTS 243 |
| topic | High Energy Astrophysical Phenomena Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2310.01509 |