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period–luminosity relation

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Cepheid variable

Overview page. Subjects: Astronomy and Astrophysics.

One of an important group of yellow giant or supergiant pulsating variables, named after the prototype, Delta Cephei. This general term is commonly applied to more than one stellar type, in...

See overview in Oxford Index

classical Cepheid

Overview page. Subjects: Astronomy and Astrophysics.

A Population I Cepheid variable, sometimes known as a Delta Cephei star; abbr. DCEP. In contrast to the superficially similar W Virginis stars of Population II, classical Cepheids are...

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Henrietta Swan Leavitt

Overview page. Subjects: Astronomy and Astrophysics.

(1868–1921)

Americanastronomer. She worked with E. C. Pickering at Harvard College Observatory, measuring the brightness of stars on photographic plates. From her studies of...

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W Virginis star

Overview page. Subjects: Astronomy and Astrophysics.

A type of Population II Cepheid variable; abbr. CW. They are giants that undergo radial pulsation in the fundamental mode, with periods from 0.8 to 35 days and amplitudes of 0.3–1.2 mag....

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Walter Baade

Overview page. Subjects: Science and Mathematics.

(1893–1960)

German-born US astronomer, who made valuable contributions to knowledge of stellar and galactic evolution.

The son of a schoolteacher, Baade was educated at...

See overview in Oxford Index