The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151

The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151

In order to improve the reverberation-mapping-based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with the International Ultraviolet Explorer. We measure emission-...

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Veröffentlicht in:The Astrophysical journal 2006-08, Vol.647 (2), p.901-909
Hauptverfasser: Metzroth, Kyle G, Onken, Christopher A, Peterson, Bradley M
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Earth, ocean, space
Exact sciences and technology
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Onken, Christopher A
Peterson, Bradley M
description In order to improve the reverberation-mapping-based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with the International Ultraviolet Explorer. We measure emission-line time delays for four lines, C IV l1549, He II l1640, C III] l 1909, and Mg II l2798, from both campaigns. We combine these measurements with the dispersion of the variable part of each respective emission line to obtain the mass of the central object. Despite the problematic nature of some of the data, we are able to measure a mass of (4.14 c 0.73) x 10 super(7) M sub( ), although this, like all reverberation-based masses, is probably systematically uncertain by a factor of 3-4.
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Exact sciences and technology
title The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151
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