X-ray Variability of the Broad Line Radio Galaxy 3C 120

Details X-ray Variability of the Broad Line Radio Galaxy 3C 120 X-ray Variability of the Broad Line Radio Galaxy 3C 120

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.3805m&link_type=abstract

American Astronomical Society, HEAD meeting #8, #38.05; Bulletin of the American Astronomical Society, Vol. 36, p.1204

Astronomy and Astrophysics

Astronomy

Scientific paper

The broad line radio galaxy 3C 120 presents an interesting hybrid of a normal Seyfert galaxy and a blazar. Originally classified as a Seyfert 1, a superluminal jet was later discovered. The jet in this object allows us to test different hypotheses about the origin of X-ray variability in AGN. We have analyzed several years of X-ray data from RXTE, and present an analysis of the timing properties of 3C 120. The power density spectrum, the first such for a radio-loud AGN, shows a steep power law at high frequencies, which breaks to a shallower slope at low frequencies. This is similar to the behavior seen in galactic black holes such as Cygnus X-1. From this we can estimate the mass of the central supermassive black hole in 3C 120. Conclusions are drawn as to the nature of X-ray variability in this object, and the connection with galactic black hole candidates.

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