WebThe red clump is the prominent group of red giant stars at about 5,000 K and 75 L☉. The red clump is a clustering of red giants in the Hertzsprung–Russell diagram at around 5,000 K and absolute magnitude (M V) +0.5, slightly hotter than most red-giant-branch stars of the same luminosity. WebJul 16, 2015 · The canonical work by Chabrier & Baraffe (1997) find a "minimum mass" for hydrogen burning (which they define as that mass where hydrogen burning can supply the stars luminosity after 1 billion years) is about 0.072 M ⊙ for a star with solar metallicity, but rises to about 0.083 M ⊙ for stars which have less than a tenth of the solar metallicity.

Metallicity - Wikipedia

WebBy this formulation therefore, stars with a higher metallicity than the Sun have a positive logarithmic value, while those with a lower metallicity than the Sun have a negative value. … Population I, or metal-rich, stars are young stars with the highest metallicity out of all three populations and are more commonly found in the spiral arms of the Milky Way galaxy. The Sun is an example of a metal-rich star and is considered as an intermediate population I star, while the solar-like Mu Arae is much richer in metals. fss evaluations dropbox/open evaluations.aspx

Wolf–Rayet star - Wikipedia

WebFeb 28, 2024 · We find that one of the stars has very high metallicity ( [ M/H ] > 0.6) and the other is slightly above solar metallicity. Both Galactic center stars have lines from scandium (Sc), vanadium (V), and yttrium (Y) that are much … WebJul 29, 2024 · Ancient stars such as Caffau's Star have low metallicity despite being old because they were born when there were not many metals around the Universe. They'll … WebThe most metal-rich stars in the inner Galaxy are concentrated to the plane and the more metal-poor stars are found predominantly further from the plane, with an overall vertical gradient in the mean of the metallicity distribution function of about − 0.45 dex kpc −1. gifts to memorialize a loved one