Pulse profile variations in the accreting X-ray pulsar Vela X-1
[Context] Vela X-1 is a well-studied accreting X-ray pulsar, with a distinctive pulse profile that has been found to be very similar in di erent observations spread out over decades. On the other hand, significant variations down to the timescale of individual pulses have been observed. The physical...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/416282 |
| Acceso en línea: | http://hdl.handle.net/10261/416282 |
| Access Level: | acceso abierto |
| Palabra clave: | Accretion, accretion disks X-rays: individuals: Vela X-1 Stars: neutron X-rays: binaries |
| Sumario: | [Context] Vela X-1 is a well-studied accreting X-ray pulsar, with a distinctive pulse profile that has been found to be very similar in di erent observations spread out over decades. On the other hand, significant variations down to the timescale of individual pulses have been observed. The physical mechanisms leading to the energy-resolved pulse profile and its variations are not fully understood. Long, uninterrupted observations of Vela X-1 with XMM-Newton in 2000, 2006, and 2019 at di erent orbital phases, allow us to study variations of the pulse properties in the soft X-ray range on all timescales in detail. |
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