Understanding the light curves of the HST-1 knot in M87 with internal
  relativistic shock waves along its jet
  Knots or blobs observed in astrophysical jets are commonly interpreted as
shock waves moving along them. Long time observations of the HST-1 knot inside
the jet of the galaxy M87 have produced detailed multi-wavelength light curves.
In this article, we model these light curves using the semi-analytical approach
developed by Mendoza et al. (2009). This model was developed to account for the
light curves of working surfaces moving along relativistic jets. These working
surfaces are generated by periodic oscillations of the injected flow velocity
and mass ejection rates at the base of the jet. Using genetic algorithms to fit
the parameters of the model, we are able to explain the outbursts observed in
the light curves of the HST-1 knot with an accuracy greater than a 2 sigma
statistical confidence level.
