Published in
American Association for the Advancement of Science, Science, 6192(345), p. 64-68, 2014
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A fast and long-lived outflow from the supermassive black hole in NGC 5548
,
M. Mehdipour ,
P.-O. Petrucci,
K. C. Steenbrugge,
N. Arav,
E. Behar,
S. Bianchi ,
R. Boissay ,
G. Branduardi-Raymont,
C. Chamberlain,
E. Costantini ,
J. C. Ely,
J. Ebrero
and other authors.
Full text: Download
Abstract
Gas jets block extragalactic x-rays Supermassive black holes at the heart of active galaxies produce powerful gas outflows. NGC 5548 is one such source known to sustain a persistent outflow of ionized gas. However, its associated x-ray and ultraviolet (UV) emission seem to have been suppressed in recent years. Kaastra et al. conducted a multiwavelength monitoring campaign throughout 2013 to characterize the system's behavior. They suggest that an additional faster jet component has been launching clumps of gas that obscure both the x-ray and UV radiation. The timing of this phenomenon indicates a source only a few light-days away from the nucleus. This proximity suggests that the outflow could be associated with a wind from the supermassive black hole's accretion disk. Even more powerful outflows could also influence their host galaxies, and this finding demonstrates how that feedback might work. Science , this issue p. 64