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

Kyle Metzroth | Zendy; Christopher A. Onken | Zendy; B. M. Peterson | Zendy

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

Author(s) -

Kyle Metzroth,

Christopher A. Onken,

B. M. Peterson

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505525

Subject(s) - supermassive black hole , galaxy , astrophysics , reverberation mapping , physics , active galactic nucleus , black hole (networking) , emission spectrum , solar mass , line (geometry) , spectral line , astronomy , geometry , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol , mathematics

In order to improve the reverberation-mapping based estimate of the mass ofthe central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we havereanalyzed archival ultraviolet monitoring spectra from two campaignsundertaken with the International Ultraviolet Explorer. We measureemission-line time delays for four lines, C IV 1549, He II 1640, C III] 1909,and Mg II 2798, from both campaigns. We combine these measurements with thedispersion of the variable part of each respective emission line to obtain themass of the central object. Despite the problematic nature of some of the data,we are able to measure a mass of 41.1 (+/- 7.3) million solar masses, althoughthis, like all reverberation-based masses, is probably systematically uncertainby a factor of 3-4.Comment: 25 pages, 5 figures. Accepted for publication in The Astrophysical Journa

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