The H-R Diagram Main-Sequence of Stars Has a Limit at the Lower-Mass

question 85

Multiple Choice

The H-R diagram main-sequence of stars has a limit at the lower-mass or energy-output end because

• A)low-mass stars form from the interstellar medium very rarely.
• B)low-mass objects are composed primarily of solids, not gases.
• C)pressure does not depend on temperature in degenerate matter.
• D)the lower limit represents when the radius of the star would be zero.
• E)there is a minimum temperature for hydrogen nuclear fusion (the definition of a star).

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