diff --git a/Metallicity_Stack_Commons/column_names.py b/Metallicity_Stack_Commons/column_names.py
index 61c670f..f084878 100644
--- a/Metallicity_Stack_Commons/column_names.py
+++ b/Metallicity_Stack_Commons/column_names.py
@@ -20,6 +20,10 @@
 for line0 in line_name:
     gauss_lines_names0 += ['{}_{}'.format(line0, suffix) for suffix in gauss_names0]
 
+# Temperature and metallicity properties
+temp_metal_names0 = ['T_e', '12+log(O/H)', '12+log(O+/H)', '12+log(O++/H)', 'log(O+/H)', 'log(O++/H)']
+
+
 def merge_column_names(*args):
     """
     Purpose: