CONAN.utils.convert_rho
=======================

.. py:function:: CONAN.utils.convert_rho(rho, ecc=0, w=90, conv='true2obs')

   convert true stellar density to transit derived density or vice-versa

   :param rho: stellar density, true or observed
   :type rho: float
   :param ecc: eccentricity
   :type ecc: float
   :param w: argumenent of periastron in degrees
   :type w: float
   :param conv: whether to convert from true2obs or obs2true, by default "true2obs"
   :type conv: str, optional

   :returns: **rho_star** -- stellar density
   :rtype: float