Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
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Campo DC | Valor | Idioma |
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dc.contributor | Astronomía y Astrofísica | es_ES |
dc.contributor.author | Ramachandran, Varsha | - |
dc.contributor.author | Oskinova, Lidia M. | - |
dc.contributor.author | Hamann, Wolf-Rainer | - |
dc.contributor.author | Sander, Andreas | - |
dc.contributor.author | Todt, Helge | - |
dc.contributor.author | Pauli, Daniel | - |
dc.contributor.author | Shenar, Tomer | - |
dc.contributor.author | Torrejon, Jose M. | - |
dc.contributor.author | Postnov, Konstantin | - |
dc.contributor.author | Blondin, John M. | - |
dc.contributor.author | Bozzo, Enrico | - |
dc.contributor.author | Hainich, Rainer | - |
dc.contributor.author | Massa, Derck | - |
dc.contributor.other | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | es_ES |
dc.contributor.other | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías | es_ES |
dc.date.accessioned | 2022-11-22T07:53:36Z | - |
dc.date.available | 2022-11-22T07:53:36Z | - |
dc.date.issued | 2022-11-11 | - |
dc.identifier.citation | Astronomy & Astrophysics. 2022, 667: A77. https://doi.org/10.1051/0004-6361/202243683 | es_ES |
dc.identifier.issn | 0004-6361 (Print) | - |
dc.identifier.issn | 1432-0746 (Online) | - |
dc.identifier.uri | http://hdl.handle.net/10045/129634 | - |
dc.description.abstract | M33 X-7 is the only known eclipsing black hole high mass X-ray binary. The system is reported to contain a very massive O supergiant donor and a massive black hole in a short orbit. The high X-ray luminosity and its location in the metal-poor galaxy M33 make it a unique laboratory for studying the winds of metal-poor donor stars with black hole companions and it helps us to understand the potential progenitors of black hole mergers. Using phase-resolved simultaneous HST- and XMM-Newton-observations, we traced the interaction of the stellar wind with the black hole. We observed a strong Hatchett-McCray effect in M33 X-7 for the full range of wind velocities. Our comprehensive spectroscopic investigation of the donor star (X-ray+UV+optical) yields new stellar and wind parameters for the system that differ significantly from previous estimates. In particular, the masses of the components are considerably reduced to ≈38 M⊙ for the O-star donor and ≈11.4 M⊙ for the black hole. The O giant is overfilling its Roche lobe and shows surface He enrichment. The donor shows a densely clumped wind with a mass-loss rate that matches theoretical predictions. An extended ionization zone is even present during the eclipse due to scattered X-ray photons. The X-ray ionization zone extends close to the photosphere of the donor during inferior conjunction. We investigated the wind-driving contributions from different ions and the changes in the ionization structure due to X-ray illumination. Toward the black hole, the wind is strongly quenched due to strong X-ray illumination. For this system, the standard wind-fed accretion scenario alone cannot explain the observed X-ray luminosity, pointing toward an additional mass overflow, which is in line with our acceleration calculations. The X-ray photoionization creates an He II emission region around the system emitting ∼1047 ph s−1. We computed binary evolutionary tracks for the system using MESA. Currently, the system is transitioning toward an unstable mass transfer phase, possibly resulting in a common envelope of the black hole and the O-star donor. Since the mass ratio is q ≳ 3.3 and the period is short, the system is unlikely to survive the common envelope, but will rather merge. | es_ES |
dc.description.sponsorship | VR acknowledges support by the Deutsches Zentrum fsür Luft- und Raumfahrt (DLR) under grant 50 OR 1912. VR and AACS acknowledge support by the Deutsche Forschungsgemeinschaft (DFG – German Research Foundation) in the form of an Emmy Noether Research Group (grant number SA4064/1-1, PI Sander). DP acknowledges financial support by the Deutsches Zentrum für Luft und Raumfahrt (DLR) grant FKZ 50 OR 2005. | es_ES |
dc.language | eng | es_ES |
dc.publisher | EDP Sciences | es_ES |
dc.rights | © V. Ramachandran et al. 2022. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | es_ES |
dc.subject | Stars: black holes | es_ES |
dc.subject | Stars: massive | es_ES |
dc.subject | Stars: winds | es_ES |
dc.subject | Outflows | es_ES |
dc.subject | X-rays: binaries | es_ES |
dc.subject | Stars: fundamental parameters | es_ES |
dc.subject | Stars: evolution | es_ES |
dc.title | Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.peerreviewed | si | es_ES |
dc.identifier.doi | 10.1051/0004-6361/202243683 | - |
dc.relation.publisherversion | https://doi.org/10.1051/0004-6361/202243683 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
Aparece en las colecciones: | INV - Astronomía y Astrofísica - Artículos de Revistas |
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