Red-giant branch | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Red-giant_branch


00:00:32 1 Discovery
00:02:27 2 Evolution
00:03:08 2.1 Subgiant phase
00:05:24 2.2 Ascending the red-giant branch
00:07:01 2.3 Tip of the red-giant branch
00:08:02 2.4 Leaving the red-giant branch
00:10:01 2.5 Properties
00:11:52 3 Variability



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SUMMARY
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The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of  stellar evolution.  It is a stage that follows the main sequence for low- to intermediate-mass stars. Red-giant-branch stars have an inert helium core surrounded by a shell of hydrogen fusing via the CNO cycle. They are K- and M-class stars much larger and more luminous than main-sequence stars of the same temperature.