Central_object.radius
=====================
Radius of the central object in the system, e.g the white dwarf or black hole.

For systems containing a WD  the default radius is set by the mass-radius relation. For a BH, the default is set R (ISCO) for a non-rotating BH, that is to say :math:`6R_g`.  

Type
  Double

Unit
  cm

Values
  Greater than 0

File
  `setup_star_bh.c <https://github.com/sirocco-rt/sirocco/blob/master/source/setup_star_bh.c>`_