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单词 metallicity
释义
metallicity
noun[CorU]
physicsspecialized
uk
/ˌmet.əlˈɪ.sə.ti/us
/ˌmet̬.əlˈɪ.sə.t̬i/
theamountofmaterialthat is notheliumorhydrogenin astar,planet, etc.:
金属量（星体内除氢和氦元素外其他化学元素的比例）
20 to 30% of sun-likestarswithlargemetallicities areknownto haveplanets.已知有20%到30%的具有大金属丰度的类太阳恒星都有自己的行星。
Compared to the Sun, 47 Tucanae has less than a third the metallicity.与太阳相比，杜鹃座47的金属丰度不到1/3。
More examples
  • Thegreatera star's metallicity, thebetteritschancesto haveplanets.
  • If the metallicity is toolow, there is not enoughmaterialtobuildEarth-likeplanets.
  • Theprocesscan makeplanetswithenrichedmetallicities asseeninourownsolarsystem.
SMART Vocabulary: related words and phrases
Physics: the state of matter
  • absorbency
  • absorption
  • acidic
  • allotropic
  • compressible
  • concentration
  • e-liquid
  • fluid
  • gaseous
  • impermeable
  • metallic
  • neutral
  • permeable
  • pressurized
  • slurry
  • superabsorbent
  • superwave
  • unabsorbent
  • unset
  • viscosity
See more results »
(Definition ofmetallicityfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

Examplesofmetallicity

metallicity
For example, the radial galacticmetallicitygradient determines isotope concentrations, silica and magnesium concentrations, etc., all of which are important for forming habitable planetary systems.
From theCambridge English Corpus
The bar will hence be able to relocate stars, and stars with low or highmetallicitycould be found far away from their original orbits.
From theCambridge English Corpus
For example, until sufficientmetallicityhas developed by the stellar burning of light elements, terrestrial type planets will not form.
From theCambridge English Corpus
This occurs more rapidly in stars that are more massive and lower inmetallicity.
From theCambridge English Corpus
Thus, highmetallicitystars could be found in all parts of a barred galaxy.
From theCambridge English Corpus
In particular, the association of planet size and occurrence frequency with stellar mass andmetallicitywill be investigated.
From theCambridge English Corpus
This rules out the outer parts of the disc where themetallicityis low due to slow star formation.
From theCambridge English Corpus
Observations of extrasolar planetary systems indicate that the presence of giant extrasolar planets at small distances from their host stars is strongly correlated with highmetallicityof the host stars.
From theCambridge English Corpus
Metallicitytends to play a large role in the formation of planets, determining if they form, and what kind of planet they will form.
From
Wikipedia
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In practice, corrections are required to account for variations in age ormetallicityfrom galaxy to galaxy.
From
Wikipedia
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The unit often used formetallicityis the dex which is a (now-deprecated) contraction of decimal exponent.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Stars of higher mass andmetallicitytend to have more numerous and more massive planets.
From
Wikipedia
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The lowermetallicitydecreases the opacity of their outer layers and decreases the radiation pressure, resulting in a smaller, hotter star for a given mass.
From
Wikipedia
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The explanation of their underluminosity lies in their lowmetallicity: these stars are unenriched in elements heavier than helium.
From
Wikipedia
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A moving group is distinguished by its members having about the same age, composition (ormetallicity) and motion through space.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/metallicity##
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更新时间：2024/12/27 23:29:38