Steps toward the Hertzsprung-Russell Diagram

Details Steps toward the Hertzsprung-Russell Diagram Steps toward the Hertzsprung-Russell Diagram

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pht....31c..32d&link_type=abstract

Physics Today, vol. 31, Mar. 1978, p. 32-39.

Physics

Hertzsprung-Russell Diagram, Stellar Luminosity, Stellar Spectra, Giant Stars, Hot Stars, Main Sequence Stars, Star Distribution, Supergiant Stars, White Dwarf Stars

Scientific paper

This paper presents a history of the development of the Hertzsprung-Russell Diagram, starting with Secchi and Lockyer in the 1870s. It had been observed that stars differ as to spectral type and luminosity, and deduced that the differences were a function of temperature. Another area for investigation was the determination of stellar distance, and its correlation with luminosity and size, based on knowledge of the laws of radiation. Hertzsprung and Russell's own contribution to the science of astronomy was the formulation of the stellar main sequence, with the extraordinary stars (giants, supergiants, and white dwarfs) considered outside the sequence.

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