surface gravity
Noun
Meaning
surface gravity (countable and uncountable, plural surface gravities)
the gravitational acceleration experienced at a planet's surface at the equator, including the effects of rotation.
Examples
Eros's surface gravity varies greatly because Eros is not a sphere but an elongated peanut-shaped (or potato- or shoe-shaped) object.
For surface gravity waves, the water particle velocities are much smaller than the phase velocity, in most cases.
Clement later corrected his model of Mesklin and determined that the maximum surface gravity would be "only 250 gravities".
Its surface gravity is 0.063 g (compared to 1 g for Earth).
Most accurate relative gravimeters are superconducting gravimeters, and these are sensitive to one thousandth of one billionth of Earth surface gravity.
So the line width is dependent on the surface pressure of the star, which in turn is determined by the temperature and surface gravity.