red giant branch star造句

• Extrinsic S stars are not on the TP-AGB, but are red giant branch stars or early AGB stars.
• This is the closest planet orbiting around any ascending Red Giant Branch star, and second-closest planet to a giant star after the companion of HIP 13044.
• They have been estimated to make up between 30 % and 70 % of all S-type stars, although only a tiny fraction of all red giant branch stars.
• The most common red giants are the so-called red giant branch stars ( RGB stars ) whose shells are still fusing hydrogen into helium, while the core is inactive helium.
• Red giant branch stars with a degenerate helium core all reach the tip with very similar core masses and very similar luminosities, although the more massive of the red giants become hot enough to ignite helium fusion before that point.
• A simplified statistical analysis suggests that ? Virginis is likely to be a red giant branch star fusing hydrogen in a shell around an inert helium core, but there is about a 22 % chance that it is a horizontal branch star fusing helium in its core.
• Red giant branch stars have another issue for detecting planets around them : while planets around these stars are much more likely to transit due to the larger size, these transit signals are hard to separate from the main star's brightness light curve as red giants have frequent pulsations in brightness with a period of few hours to days . This is especially notable with subgiants.