Timing variability of Vela X-1 during a bright flare
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Title: | Timing variability of Vela X-1 during a bright flare |
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Authors: | Martin-Carrillo, Antonio | Kretschmar, Peter | Martínez Núñez, Silvia | Torrejon, Jose M. | Kreykenbohm, Ingo | Wilms, Jorn | Fürst, Felix | Stuhlinger, Martin | Rodes Roca, José Joaquín | Hanlon, Lorraine |
Research Group/s: | Astronomía y Astrofísica |
Center, Department or Service: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Keywords: | X-ray binaries | Vela X-1 | High-Mass | Timing |
Knowledge Area: | Física Aplicada | Astronomía y Astrofísica |
Issue Date: | Jul-2014 |
Series/Report no.: | 2014xru..confE.130M |
Abstract: | We present an in-depth analysis of the temporal behaviour of the HMXB Vela X-1 which exhibited strongly varying flux levels during an observation by XMM-Newton. During the 100 ks observation the source went from being in a highly absorbed initial state, to one of increased activity which was followed by a giant X-ray flare, before finally reaching a settled state with low absorption. The lower absorption state allows the normally absorbed pulse profile below 1 keV to be studied. Vela X-1 also showed multiple changes in the structure of the pulse profile including a phase lag with the harder photons leading the softer ones. A change in the pulse period, significant at approximately the 2σ level, was observed at the beginning of the powerful flare and is likely related to the large accreted mass. For comparison purposes, an earlier XMM-Newton observation in a lower active state is used to put the variations in pulse profile and phase lag in context. |
Description: | The X-ray Universe 2014, edited by Jan-Uwe Ness. Online at http://www.cosmos.esa.int/web/xmm-newton/2014-symposium/, id.130 |
URI: | http://hdl.handle.net/10045/109367 |
Language: | eng |
Type: | info:eu-repo/semantics/conferenceObject |
Rights: | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License |
Peer Review: | no |
Publisher version: | http://www.cosmos.esa.int/web/xmm-newton/2014-symposium/ | https://ui.adsabs.harvard.edu/abs/2014xru..confE.130M/abstract |
Appears in Collections: | INV - Astronomía y Astrofísica - Comunicaciones a Congresos, Conferencias, etc. |
Files in This Item:
File | Description | Size | Format | |
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AMartinCarrillo_t.pdf | Talk contribution XRU2014 | 2,28 MB | Adobe PDF | Open Preview |
This item is licensed under a Creative Commons License