asymptotic giant branch

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asymptotic giant branch

(ass-im-tot -ik) See giant.

asymptotic giant branch

[‚a‚sim¦täd·ik ‚jī·ənt ′branch]
(astronomy)
A grouping of stars on the Hertzsprung-Russell diagram that is roughly asymptotic to the giant branch; it represents a later stage in giant-star evolution in which hydrogen-fusing and helium-fusing shells surround a core in which both hydrogen fusion and helium fusion are exhausted. Abbreviated AGB.
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References in periodicals archive ?
Title: Asymptotic Giant Branch Stars in the Local Group
Paired talks on theory and observation review the current status of solar abundances, main sequence stars, massive stars close to the main sequence, red giant branch, asymptotic giant branch stars, binaries, and nucleosynthesis.
The smaller supply of neutrons found in the helium shell of bloated, elderly stars known as asymptotic giant branch stars prompts "slow" capture, in which atoms absorb neutrons at a slower rate.

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