# What is "superficial gravity"

I have seen the term superficial gravity used and it seems to be equivalent to surface gravity

seen, e.g., here http://arxiv.org/pdf/1701.02295

Is there any difference between superficial and surface gravity? When should one be using one or the other?

• The author is Portuguese. In Portuguese, "surface" is "superfície". If you look at the equations, you'll see that the definition ($\log g$) corresponds to "surface gravity". I suspect the standard term has been lost in translation.
– pela
Apr 2 '17 at 18:39
• @pela even in English the word "superficial" means "on (or above) the surface." Apr 8 '17 at 23:14
• The author in not Portuguese. Brazilian, instead. But he speaks Portuguese, though. Jun 18 '19 at 15:23