Color-Magnitude Diagram (CMD) of Globular Cluster M5

Plotting a relation between visual magnitude (V) and color index

(B-V) for individual stars of the cluster

M 5, one obtains this

picture of an old, distorted apple-tree with only two branches. It

is, nevertheless, the Tree of Knowledge for astrophysicists.

(A): Main Sequence.

(B): Red Giant Branch.

(C): Helium flash occurs here

(D): Horizontal Branch (HB)

(E): Schwarzschild space in the HB

(F): White Dwarfs (below the arrow).

By Leos Ondra

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Back to Leos’ M5 article

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Hartmut Frommert

([email protected])

Christine Kronberg

([email protected])

Last Modification: 10 Feb 1998, 21:30 MET