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http://hdl.handle.net/2445/187283
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DC Field | Value | Language |
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dc.contributor.author | del Palacio, S. | - |
dc.contributor.author | Benaglia, P. | - |
dc.contributor.author | De Becker, M. | - |
dc.contributor.author | Bosch i Ramon, Valentí | - |
dc.contributor.author | Romero, Gustavo E. | - |
dc.date.accessioned | 2022-07-04T16:16:44Z | - |
dc.date.available | 2023-07-01T05:10:22Z | - |
dc.date.issued | 2022 | - |
dc.identifier.issn | 1323-3580 | - |
dc.identifier.uri | http://hdl.handle.net/2445/187283 | - |
dc.description.abstract | The recently discovered massive binary system Apep is the most powerful synchrotron emitter among the known Galactic colliding-wind binaries. This makes this particular system of great interest to investigate stellar winds and the non-thermal processes associated with their shocks. This source was detected at various radio bands, and in addition the wind-collision region was resolved by means of very-long baseline interferometric observations. We use a non-thermal emission model for colliding-wind binaries to derive physical properties of this system. The observed morphology in the resolved maps allows us to estimate the system projection angle on the sky to be ψ≈85∘. The observed radio flux densities also allow us to characterise both the intrinsic synchrotron spectrum of the source and its modifications due to free--free absorption in the stellar winds at low frequencies; from this we derive mass-loss rates of the stars of M˙WN≈4×10−5 M⊙ yr−1 and M˙WC≈2.9×10−5 M⊙ yr−1. Finally, the broadband spectral energy distribution is calculated for different combinations of the remaining free parameters, namely the intensity of the magnetic field and the injected power in non-thermal particles. We show that the degeneracy of these two parameters can be solved with observations in the high-energy domain, most likely in the hard X-rays but also possibly in γ-rays under favourable conditions. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Cambridge University Press | - |
dc.relation.isformatof | Versió postprint del document publicat a: | - |
dc.relation.ispartof | Publications of the Astronomical Society of Australia, 2022, vol. 39, p. 4 | - |
dc.rights | (c) Astronomical Society of Australia, 2022 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estels | - |
dc.subject.classification | Radiació | - |
dc.subject.classification | Relativitat (Física) | - |
dc.subject.other | Stars | - |
dc.subject.other | Radiation | - |
dc.subject.other | Relativity (Physics) | - |
dc.title | The non-thermal emission from the colliding-wind binary Apep | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 721974 | - |
dc.date.updated | 2022-07-04T16:16:44Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
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721974.pdf | 1.5 MB | Adobe PDF | View/Open |
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