Academic Journal
“An X-Raydio Switcheroo” – The detection of correlated mode changes in radio and X-ray
| العنوان: | “An X-Raydio Switcheroo” – The detection of correlated mode changes in radio and X-ray |
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| المؤلفون: | van Leeuwen, Joeri, Hermsen, Wim, Hessels, Jason, Kuiper, Lucien, Mitra, Dipanjan, Rankin, Joanna, Stappers, Ben, Wright, Geoff |
| المصدر: | Proceedings of the International Astronomical Union ; volume 8, issue S291, page 321-321 ; ISSN 1743-9213 1743-9221 |
| بيانات النشر: | Cambridge University Press (CUP) |
| سنة النشر: | 2012 |
| الوصف: | We present high-sensitivity XMM/LOFAR observations that show for the first time that mode switching extends from radio to X-ray. In pulsar B0943+10, the known changes in radio profile and drift rate are confidently tied to simultaneous changes in X-ray emission. In mode switching, seen in many pulsars, profile and subpulse-drift behavior change almost instantaneously. The mechanism for these drastic changes, or for the bi-stable emission behavior, is not understood; while even for the basic emission mechanism different families of theories (e.g. vacuum gap, or space-charge limited flow models) exist. To discriminate between such models, we carried out a campaign of 42 hours of simultaneous LOFAR/XMM-Newton observations on PSR B0943+10. Through LOFAR's unparalleled low-frequency sensitivity, mode changes were pinpointed to 10-second accuracy. XMM X-ray photons were next separated by the two radio modes. We discovered large modal differences in the X-ray pulsations, flux, and spectral shapes: in the radio-bright mode, no X-ray pulsations are detected – but in the radio-quiet mode, B0943+10 is strongly pulsating in X-ray. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1017/s1743921312023976 |
| الاتاحة: | http://dx.doi.org/10.1017/s1743921312023976 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921312023976 |
| Rights: | https://www.cambridge.org/core/terms |
| رقم الانضمام: | edsbas.3B40DA00 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1017/s1743921312023976 |
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