The Outburst of HST-1 in the M87 Jet

Details The Outburst of HST-1 in the M87 Jet The Outburst of HST-1 in the M87 Jet

2005-11-28

arxiv.org/abs/astro-ph/0511755v1

Astrophys.J.640:211-218,2006

Astronomy and Astrophysics

Astrophysics

ApJ accepted, 7 pages, 4 figures

Scientific paper

10.1086/500081

The X-ray intensity of knot HST-1, 0.85" from the nucleus of the radio galaxy M87, has increased by more than a factor of 50 during the last 5 years. The optical increase is similar and our more limited radio data indicate a commensurate activity. We give the primary results of our Chandra X-ray Observatory monitoring program and consider some of the implications of this extreme variability in a relativistic jet. We find that the data support a 'modest beaming synchrotron' model as indicated in our earlier papers. Based on this model, the decay of the X-ray lightcurve appears to be dominated by light travel time across the emitting region of HST-1, rather than synchrotron loss timescales.

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