Fr.: grumeau rouge
A concentration, on the → horizontal branch, of → red giant stars that roughly have the same intrinsic brightness. These core → helium burning stars are the metal rich equivalents of the better known → horizontal branch stars. Theoretical models predict that their absolute luminosity only weakly depends on their age and chemical composition.
red clump star
setâre-ye gude-ye sorx
Fr.: étoile du grumeau rouge
A star on the → horizontal branch which results from the evolution of a → red giant with an initial mass of ~ 1 Msun.