Relativistic Ejections Associated with High-energy Outbursts in the M87 Jet

Details Relativistic Ejections Associated with High-energy Outbursts in the M87 Jet Relativistic Ejections Associated with High-energy Outbursts in the M87 Jet

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20923907c&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #239.07; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

Our monitoring of the nearby radio galaxy M87 with NASA's Chandra X-ray Observatory isolated short (month) timescale variability in `HST-1', a region of the jet >60 parsecs from the central supermassive black hole. The variability culminated in a remarkable X-ray outburst peaking in mid-2005. The outburst is >50 over quiescent and was for a few years, the brightest X-ray source in the galaxy. Prompted by this remarkable discovery and the detection of a comparable increase in radio activity, we began to monitor the jet with the NRAO Very Long Baseline Array (VLBA). These high spatial resolution observations resolved dynamic structures in the variable knot HST-1 and clear superluminal motion in multiple features. The HESS collaboration has recently reported a TeV flare broadly mimicking our radio/optical/X-ray lightcurves for HST-1. This multi-frequency variability and accompanying superluminal behavior is reminiscent of blazars in more distant active galaxies except here, the action is clearly displaced from the central supermassive black-hole. This gives us crucial insight into the production region of blazar-like emission.
The NRAO operated by Associated Universities, Inc. under a cooperative agreement with the NSF. Work at SAO was supported by NASA grants GO3-4124A, GO4-5131X, and GO5-6118X.

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