Multiwaveband Monitoring of the Radio Galaxy 3C 120

Details Multiwaveband Monitoring of the Radio Galaxy 3C 120 Multiwaveband Monitoring of the Radio Galaxy 3C 120

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0004994m&link_type=abstract

Technical Report, Boston Univ. Boston, MA United States Dept. of Astronomy

Astronomy and Astrophysics

Astronomy

Radio Galaxies, Radio Astronomy, Galactic Radio Waves, Radio Observation, X Ray Timing Explorer, Radio Emission, Binary Stars, Radio Jets (Astronomy), Black Holes (Astronomy), Accretion Disks, Astronomical Observatories

Scientific paper

This project started new weekly observations of the radio galaxy 3C 120 during Cycle 3 (1998) of the RXTE mission. It is clear that the weekly observations in 1998 did not resolve the variations of the X-ray emission. The most prominent features are three dips in the X-ray flux, separated from each other by about one year. The dips (as well as the the general flux level) is not correlated with the radio emission. However, the times of the dips coincided, within the errors, with the times of zero separation between apparently superluminal features in the radio jets and the cores of the jets. This is potentially a very exciting finding, which would, if confirmed, link the physics of this radio galaxy with that of the binary star system in our Galaxy, 1915+105. The X-ray dip would then be interpreted as the dissociation of the inner accretion disk, with the extra accretion onto the black hole being accompanied by enhanced flow of energy and material down the relativistic jet. This would result in the creation of the observed new superluminal knot.

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