Kaastra, JS;
Kriss, GA;
Cappi, M;
Mehdipour, M;
Petrucci, P-O;
Steenbrugge, KC;
Arav, N;
... Whewell, M; + view all
(2014)
A fast and long-lived outflow from the supermassive black hole in NGC 5548.
pp. 64-68.
10.1126/science.1253787.
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Abstract
Supermassive black holes in the nuclei of active galaxies expel large amounts of matter through powerful winds of ionized gas. The archetypal active galaxy NGC 5548 has been studied for decades, and high-resolution X-ray and UV observations have previously shown a persistent ionized outflow. An observing campaign in 2013 with six space observatories shows the nucleus to be obscured by a long-lasting, clumpy stream of ionized gas never seen before. It blocks 90% of the soft X-ray emission and causes simultaneous deep, broad UV absorption troughs. The outflow velocities of this gas are up to five times faster than those in the persistent outflow, and at a distance of only a few light days from the nucleus, it may likely originate from the accretion disk.
| Type: | Article |
|---|---|
| Title: | A fast and long-lived outflow from the supermassive black hole in NGC 5548 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/science.1253787 |
| Publisher version: | http://dx.doi.org/10.1126/science.1253787 |
| Language: | English |
| Additional information: | 25 pages, 8 figures. This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science, electronically available at Science Express (June 19, 2014). For a brief video explaining the key results of this paper, please visit http://www.issibern.ch/teams/ngc5548/?page_id=25 |
| Keywords: | astro-ph.HE, astro-ph.HE, astro-ph.CO, astro-ph.GA |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1453102 |
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