def _param_fort_validation(args):
    """Validates the input parameters for the forward models"""
    temp = args.get('ptemp', 1000)
    chem = args.get('pchem', 'noTiO')
    cloud = args.get('cloud', '0')
    pmass = args.get('pmass', '1.5')
    m_unit = args.get('m_unit', 'M_jup')
    reference_radius = args.get('refrad', 1)
    r_unit = args.get('r_unit', 'R_jup')
    rstar = args.get('rstar', 1)
    rstar_unit = args.get('rstar_unit', 'R_sun')
    input_args = {'temp': temp, 'chem': chem, 'cloud': cloud, 'pmass':
        pmass, 'm_unit': m_unit, 'reference_radius': reference_radius,
        'r_unit': r_unit, 'rstar': rstar, 'rstar_unit': rstar_unit}
    return input_args
