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Iron line spectroscopy of NGC 4593 with XMM-Newton: where is the black hole accretion disc?
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UNSPECIFIED (2004) Iron line spectroscopy of NGC 4593 with XMM-Newton: where is the black hole accretion disc? MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 352 (1). pp. 205-210. doi:10.1111/j.1365-2966.2004.07909.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2004.07909.x
Abstract
We present an analysis of the 2-10 keV XMM-Newton/EPIC-pn spectrum of the Seyfert-1 galaxy NGC 4593. Apart from the presence of two narrow emission lines corresponding to the K lines of cold and hydrogen-like iron, this spectrum possesses a power-law form to within similar to3-5 per cent. There is a marked lack of spectral features from the relativistic regions of the black hole accretion disc. We show that the data are, however, consistent with the presence of a radiatively efficient accretion disc extending right down to the radius of marginal stability if it possesses low iron abundance, an appropriately ionized surface, a very high inclination, or a very centrally concentrated emission pattern (as has been observed during the deep minimum state of the Seyfert galaxy MCG-6-30-15). Deeper observations of this source are required in order to validate or reject these models.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Journal or Publication Title: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | ||||
Publisher: | BLACKWELL PUBLISHING LTD | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 21 July 2004 | ||||
Dates: |
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Volume: | 352 | ||||
Number: | 1 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 205-210 | ||||
DOI: | 10.1111/j.1365-2966.2004.07909.x | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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