Last Updated：2025/12/08

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(astrophysics) A theoretical maximum radius of a star of given mass; the radius at which the inward force of gravity exactly balances the outward pressure of the gas of the star.

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Hayashi limit

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Source Word

Hayashi limit

Noun

(astrophysics) A theoretical maximum radius of a star of given mass; the radius at which the inward force of gravity exactly balances the outward pressure of the gas of the star.

Japanese Meaning

与えられた質量の星において、内向きの重力と外向きの気体圧が正確に釣り合う点としての、理論上の最大半径。

What is this buttons?

When modeling protostar evolution, we found that the radius could not exceed the Hayashi limit for its mass.

Google Translation / DeepL Translation

原始星の進化をモデル化したところ、その質量に対してハヤシ限界（理論上の最大半径）を超えることはできないと分かった。

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Sense（1）

(astrophysics) A theoretical maximum radius of a star of given mass; the radius at which the inward force of gravity exactly balances the outward pressure of the gas of the star.

When a star is fully within hydrostatic equilibrium—a condition where the inward force of gravity is matched by the outward pressure of the gas—the star can not exceed the radius defined by the Hayashi limit.

Google Translation / DeepL Translation

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Hayashi limits

（ plural ）

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Hayashi limit

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Hayashi limit

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