Next: Principles of Scenario Machine Up: The Scenario Machine: Operational Previous: Dependence on the Scenario
Next: Principles
of Scenario Machine Up: The
Scenario Machine: Operational Previous: Dependence
on the Scenario
The only way to define the origin of a ``rare'' binary system is to calculate evolutionary tracks of different binaries until one come across the evolutionary stage of interest. Note, that the term ``rare'' in a simulation experiment does not entirely refer to the rate of occurrence of the corresponding object in the Galaxy. The systems are rarely encountered in a real galaxy for two possible reasons:
Clearly, both rare-born and short-living binary systems are practically unobservable in real galaxies.
In the statistical experiment, the first factor can easily be taken
into account. Problems start to arise when search is made for evolutionary
tracks of the second type. If we possess some a priori information
(or assumptions) about the initial volume 
in the parameter space where the studied binary came from, we can accelerate
the search by generating the parameters only in the most probable region.
Another way to shorten the time spent in looking for ``rare'' tracks is
to use super-uniform quasi-random sequences (see Sobol', 1973[183]).
Finding one of these tracks allows us to answer both questions as to what
binary type the progenitor of the investigated system was and what kind
of binary will result from it. Of course, the discovery of a track does
not mean that the investigated binary cannot be formed in another way.
However now we are able to study in more detail the occurrence rate of
the detected track and to find limits of the initial parameter volume
, and then, by generating the initial parameters only within these limits,
we can estimate the occurrence rate and distributions upon parameters with
a higher accuracy by using less extended calculations.
