The lower edge of the Main Sequence band is known as ____ and represents the location in the HR-diagram at which stars begin their lives as main sequence stars.
A) the Coulomb barrier
B) hydrostatic equilibrium
C) the birth line
D) the zero-age main sequence
E) the evolutionary track

Question

Quizplus · Accepted Answer

The zero-age main sequence (ZAMS) represents the location on the HR-diagram where stars begin their lives as main sequence stars. It is the lower edge of the Main Sequence band. The zero-age main sequence (ZAMS) marks the location on the HR-diagram where stars begin their lives as main sequence stars, and is located at the lower edge of the Main Sequence band.

The Lower Edge of the Main Sequence Band Is Known