Dips in X-Ray Flux Associated with Superluminal Ejections in the Radio Galaxy 3C 120

Details Dips in X-Ray Flux Associated with Superluminal Ejections in the Radio Galaxy 3C 120 Dips in X-Ray Flux Associated with Superluminal Ejections in the Radio Galaxy 3C 120

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19712506m&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #125.06; Bulletin of the American Astronomical Society, Vol. 32, p.1611

Astronomy and Astrophysics

Astronomy

Scientific paper

We compare the RXTE X-ray light curve of 3C 120 from our late 1997 to early 2000 observations, plus early 1997 archival data, with both the cm-wave light curves (University of Michigan Radio Astronomy Observatory) and the times of ejections of apparent superluminal components (from VLBA observations; see Gómez et al. 2000). There is no correlation between the X-ray and radio light curves. However, the epochs of all four observed superluminal ejections correspond, to within the errors, with pronounced dips in the X-ray light curves (photon energies in the range 2--20 keV). This behavior is similar to that of the binary-system ``microquasar'' GRS1915+105 in the Milky Way galaxy (Mirabel & Rodriíguez 1998), although in 3C 120 there is no evidence for rapid, quasi-periodic fluctuations in X-ray flux. These observations therefore support the notion that in active galactic nuclei eruptions of energetic outflow are related to excess accretion onto a supermassive black hole. This work was supported in part by NASA grants NAG5-7331 and NAG5-9161 (RXTE observations) and NSF grant AST-9802941 (VLBA observations). References: Mirabel, I.F., & Rodríguez, L.F. 1998, Nature, 392, 673

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