vice.multizone.migration

Type : migration.specs

Default : No migration of either gas or stars.

An object which stores the migration specifications of the multizone model.

Attributes

gasmig_matrix

A matrix describing how gas moves between zones.

stars<function>

The migration settings for star particles.

See also

• vice.multizone.migration.gas

• vice.multizone.migration.stars

Example Code

>>> import vice
>>> mz = vice.multizone(name = "example")
>>> mz.migration.gas[1][0] = 0.05
>>> mz.migration.gas[0][1] = 0.05
>>> def f(zone, tform, time):
        '''
        stars born in zone 0 and 1 swap positions when they're more
        than 1 Gyr old.
        '''
        if zone == 0:
                if time - tform > 1:
                        return 1
                else:
                        return 0
        elif zone == 1:
                if time - tform > 1:
                        return 0
                else:
                        return 1
        else:
                return zone
>>> mz.migration.stars = f