Flaring from the supermassive black hole in Mrk 335 studied with Swift and NuSTAR.
In: Monthly Notices of the Royal Astronomical Society, Jg. 454 (2015-12-21), Heft 4, S. 4440-4451
Online
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Zugriff:
Monitoring of the narrow line Seyfert 1 galaxy Markarian 335 (Mrk 335) with the Swift satellite discovered an X-ray flare beginning 2014 August 29. At the peak, the 0.5-5 keV count rate had increased from that in the low-flux state by a factor of 10. A target of opportunity observation was triggered with NuSTAR, catching the decline of the flare on 2014 September 20. We present a joint analysis of Swift and NuSTAR observations to understand the cause of this flare. The X-ray spectrum shows an increase in directly observed continuum flux and the softening of the continuum spectrum to a photon index of 2.49-0.07+0.08 compared to the previous low-flux observations. The X-ray spectrum remains well described by the relativistically blurred reflection of the continuum from the accretion disc whose emissivity profile suggests that it is illuminated by a compact X-ray source, extending at most 5.2 rg over the disc. A very low reflection fraction of 0.41-0.15+0.15 is measured, unexpected for such a compact corona. The X-ray flare is, hence, interpreted as arising from the vertical collimation and ejection of the X-ray emitting corona at a mildly relativistic velocity, causing the continuum emission to be beamed away from the disc. As the flare subsides, the base of this jet-like structure collapses into a compact X-ray source that provides the majority of the radiation that illuminates the disc while continuum emission is still detected from energetic particles further out, maintaining the low reflection fraction. [ABSTRACT FROM AUTHOR]
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Flaring from the supermassive black hole in Mrk 335 studied with Swift and NuSTAR.
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Autor/in / Beteiligte Person: | Wilkins, D. R. ; Gallo, L. C. ; Grupe, D. ; Bonson, K. ; Komossa, S. ; Fabian, A. C. |
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Zeitschrift: | Monthly Notices of the Royal Astronomical Society, Jg. 454 (2015-12-21), Heft 4, S. 4440-4451 |
Veröffentlichung: | 2015 |
Medientyp: | academicJournal |
ISSN: | 0035-8711 (print) |
DOI: | 10.1093/mnras/stv2130 |
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