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Am star

Index Am star

An Am star or metallic-line star is a type of chemically peculiar star of spectral type A whose spectrum has strong and often variable absorption lines of metals such as zinc, strontium, zirconium, and barium, and deficiencies of others, such as calcium and scandium. [1]

23 relations: Apparent magnitude, Astronomical spectroscopy, Barium, Bayer designation, Binary star, Calcium, Chemical element, Chemically peculiar star, Fraunhofer lines, Gravity, Hertzsprung–Russell diagram, Main sequence, Scandium, SIMBAD, Sirius, Star, Stellar classification, Strontium, Tau3 Gruis, Tide, WW Aurigae, Zinc, Zirconium.

Apparent magnitude

The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.

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Astronomical spectroscopy

Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.

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Barium is a chemical element with symbol Ba and atomic number 56.

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Bayer designation

A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.

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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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Calcium is a chemical element with symbol Ca and atomic number 20.

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Chemical element

A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).

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Chemically peculiar star

In astrophysics, chemically peculiar stars (CP stars) are stars with distinctly unusual metal abundances, at least in their surface layers.

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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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Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward (or gravitate toward) one another.

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Hertzsprung–Russell diagram

The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

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Main sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.

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Scandium is a chemical element with symbol Sc and atomic number 21.

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SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.

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Sirius (a romanization of Greek Σείριος, Seirios,."glowing" or "scorching") is a star system and the brightest star in the Earth's night sky.

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A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

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Strontium is the chemical element with symbol Sr and atomic number 38.

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Tau3 Gruis

Tau3 Gruis is a solitary, white-hued star in the southern constellation of Grus.

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Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth.

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WW Aurigae

WW Aurigae (WW Aur) is an eclipsing binary in the constellation Auriga.

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Zinc is a chemical element with symbol Zn and atomic number 30.

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Zirconium is a chemical element with symbol Zr and atomic number 40.

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Redirects here:

Am stars, Delta Delphini star, Metallic A-type star, Metallic-line star, Metallic-line stars, Metallic-lined star, Metallic-lined stars, Rho Puppis star, Δ Delphini star, Ρ Puppis star.


[1] https://en.wikipedia.org/wiki/Am_star

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