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11 relations: Barium star, Binary star, Carbon star, Fraunhofer lines, Mass transfer, Metallicity, Methylidyne radical, Philip Childs Keenan, Stellar classification, Stellar population, White dwarf.
Barium star
Barium stars are spectral class G to K giants, whose spectra indicate an overabundance of s-process elements by the presence of singly ionized barium, Ba II, at λ 455.4 nm.
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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Carbon star
A carbon star is typically an asymptotic giant branch star, a luminous red giant, whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the oxygen in the atmosphere, leaving carbon atoms free to form other carbon compounds, giving the star a "sooty" atmosphere and a strikingly ruby red appearance.
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Fraunhofer lines
In physics and optics, the Fraunhofer lines are a set of spectral lines named after the German physicist Joseph von Fraunhofer (1787–1826).
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Mass transfer
Mass transfer is the net movement of mass from one location, usually meaning stream, phase, fraction or component, to another.
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Metallicity
In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.
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Methylidyne radical
Methylidyne (also systematically named hydridocarbon(•)), also called carbyne, is an organic compound with the chemical formula CH• (also written as). Methylidyne is the simplest carbyne.
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Philip Childs Keenan
Philip Childs Keenan (March 31, 1908 – April 20, 2000) was an American astronomer.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Stellar population
During 1944, Walter Baade categorized groups of stars within the Milky Way into bluer stars associated with the spiral arms and the general position of yellow stars near the central galactic bulge or within globular star clusters.
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White dwarf
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
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