Close encounters between cluster members can also result in the ejection of stars, a process known as 'evaporation'.

These are cluster members showing similarly blue colors as starburst galaxies only with moderate to strong H-delta absorption.

Third are cluster members showing broad and/or high excitation line spectra, often found in active galactic nuclei.

Measurements of the motion of the cluster stars and the planetary nebula's central star suggest it might be a cluster member.

As a result Coherence has no single point of failure and transparently fails over if a cluster member fails.

Popular notions of clusters include groups with small distances among the cluster members, dense areas of the data space, intervals or particular statistical distributions.

However, the tidal radius also includes many stars that are merely "passing through" and not bona fide cluster members.

They usually consist of quite a distinct dense core, surrounded by a more diffuse 'corona' of cluster members.

This results in the gradual 'evaporation' of cluster members.

Close encounters between cluster members can also result in the ejection of evaporation'.