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metallicity

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metallicity
metallicity rare. (mɛtəˈlɪsɪtɪ) [f. metallic a. + -ity.] The quality of being metallic.1831 Amer. Jrnl. Sci. XIX. 188 The..method which Dr. Wollaston employed to discover metallic titanium in the scoria of iron, and to prove the metallicity of the small crystals of titanium. 1883 Encycl. Brit. XVI. ... Oxford English Dictionary
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Metallicity
of 0 have the same metallicity as the Sun, and so on. Above 40 solar masses, metallicity influences how a star will die: Outside the pair-instability window, lower metallicity stars will collapse directly wikipedia.org
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Finding two populations in a set of data I have a set of data (metallicity of globular clusters) and wish to determine the presence of two sub-populations. I know there are two populations but I am unsure on how to sp...
For anyone else interested, I used Gaussian Mixture Modeling (GMM) algorithm to determine the means of the two populations and separate them. Details of the techniques used are explained in the paper linked on this page: <
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Metallicity distribution function
The metallicity distribution function is an important concept in stellar and galactic evolution. It is a curve of what proportion of stars have a particular metallicity ([Fe/H], the relative abundance of iron and hydrogen) of a population of stars wikipedia.org
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HD 108063
The enormous metallicity of HD 108063 has strong effect on its apparent parameters. A metal-rich star has a cooler surface temperature than a lower-metallicity star, with the strength of the effect increasing with a higher metallicity. wikipedia.org
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HD 68375
Specifically, it is a red clump star, at the cool end of the horizontal branch where stars with near-solar metallicity are found. HD 68375 is slightly metal deficient with a metallicity 76% that of the Sun and spins with a poorly constrained projected rotational velocity of . wikipedia.org
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Kepler-20f
Metallicity plays an important role in planetary systems, and stars with higher metallicity are more likely to have planets detected around them. This may be because the higher metallicity provides more material with which to quickly build planets into gas giants or because the higher metallicity wikipedia.org
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NGC 59
NGC 59 has a stellar mass of 5x108 and it is a low-luminosity, low-metallicity galaxy. has also a low metallicity. wikipedia.org
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وظيفة توزيع المعادن
تعتبر وظيفة توزيع المعدن Metallicity distribution function مفهوماً مهماً في مجال علوم تطور النجوم والمجرات، فهو يشكل رسماً بيانيَّاً لتحديد النجوم التي wikipedia.org
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Stellar population
(high metallicity) as population I. The Sun is considered population I, a recent star with a relatively high 1.4% metallicity. wikipedia.org
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SDSS J102915+172927
At the time of its discovery, it had the lowest metallicity of any known star. The metallicity of Caffau's Star is less than 6.9×10−7. wikipedia.org
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SDSS J0815+4729
SDSS J081554.26+472947.5, often abbreviated to its partial coordinates, J0815+4729, is a star with an ultra-low metallicity in the constellation of Lynx The star is also heavily enriched in nitrogen and oxygen, originating from primordial gas cloud contaminated by single zero-metallicity supernova. wikipedia.org
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HII galaxy
Generally, HII galaxies have a low metallicity and high percentage of neutral hydrogen. There is also a general correlation between metallicity and mass of the galaxies. wikipedia.org
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Andromeda V
The metallicity of Andromeda V is above the average metallicity to luminosity ratio of the Local Group's dwarf galaxies. wikipedia.org
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Psi Phoenicis
The evolutionary state and poorly constrained metallicity result in an uncertain mass of . Assuming a metallicity closer to solar, a mass of is derived. Psi Phoenicis is considered a single star, and has no known companions. wikipedia.org
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