What specific internal feature provides a direct age signature when using asteroseismology on a hydrogen-fusing star?
Answer
The size of the helium-rich core
By analyzing the frequencies of internal oscillations, scientists can precisely map the interior structure; specifically, the size of the helium-rich core directly indicates how much time has passed since the star began fusing hydrogen in its core.
#Videos
How Do We Measure the Ages of Stars? With Astrophysicist Ruth ...
How do you measure the age of a star? | Science News - YouTube
Related Questions
What fundamental property dictates a star's fuel consumption rate and lifespan?What relationship is plotted on the Hertzsprung-Russell (H-R) diagram to aid in stellar aging?Why are star clusters considered reliable natural laboratories for determining stellar age?What event marks the main-sequence turnoff point on an H-R diagram for a cluster?If the turnoff point in a cluster corresponds to stars five times the mass of the Sun, what does this imply about the cluster's age?What major factor introduces greater uncertainty when dating a single, isolated star compared to a cluster?What type of 'clock' dictates the aging process for a planet like Earth, contrasting with stellar dating?How does a star lose angular momentum over time in the process known as gyrochronology?What physical phenomenon does asteroseismology analyze to determine a star's interior structure?What specific internal feature provides a direct age signature when using asteroseismology on a hydrogen-fusing star?