(to display all colormap available use \"show\" as keyword)",
default="gas:jet,stars:rainbow,halo:PuOr")
default="gas:jet,stars:Paired,halo:Accent")
#other cmap="gas:jet,stars:rainbow,halo:PuOr"
parser.add_argument('--mergers',help="use results from mergers analysis to re-center (ex; @mdf648) to get file automatically from simulation ",default="",type=str)
parser.add_argument('--cod',help="use COD file to re-center, or @sim (ex; @mdf648) to get file automatically from simulation ",default=None)
parser.add_argument('--rect_sim',help="give a simname or a rectify file name to activate rectify",default=None)