Ram pressure stripping of galaxies:
application of the Gunn&Gott criterion
Joachim Köppen Kiel Sept. 2017

Some brief explanations

• This utility allows the user to estimate the consequences of ram pressure stripping of a galaxy - described by its parameters - in the long-pulse limit, i.e. when the duration and the time scale for the ram pressure pulse are long compared to the period for vertical oscillations of matter in the galactic plane.
• In the long-pulse limit the outcome depends on the maximum ram pressure that the galaxy has been subjected to (also known as the Gunn & Gott criterion). As a function of this maximum value we show the stripping radius - the outer radius of the gas remaining in the disk, the stripped mass fraction, and the deficiency (= log10(initial gas mass/remaining gas mass)).
• The gas surface density follows either an exponential profile of a Kuzmin profile of specified value at the centre and a radial scale.
• Green background indicates a valid input field.
• One can enter either the initial gas mass or the surface density at the centre. The valid input field has a green background and is chosen by a mouse click.
• Alternatively, one may select Bernd Vollmer's recipe (2001), where the column density to compute the stripping radius follows a different formula, which takes into account the presence of molecular clouds in the inner part of the gas disk.
• wipe&plot: clear the plot area and draws the last curve in red. Changing any parameter value (and hitting the Enter key) will overplot the new curve in red.
  overplot: after changing any parameter value, these button will overplot the new curve in the corresponding colour.

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