Extensive discussion of population types and distance scales. Original definition of population I and II.īaade, W.: Michigan Symposium on Astrophysics. Two-color observations of most of the cepheids available in globular clusters.īaade, W.: Astrophys. Analysis of RV Tauri and Semi-regular variables in high and low velocity groups.Īrp, H. Extensive observations of light curves of classical cepheids. Spectra of RV Tauri and semi-regular variables on the MKK system.Įggen, O. Spectral types of variables in globular clusters (non-RR Lyrae variables). Spectral classification of classical cepheids on MKK system. Date on motions, absolute magnitudes for long period variables.Ĭode, A. Checking M3 and adding ultraviolet colors. Color-magnitude diagrams for seven globular clusters above M„ _ Jr 1.ĪrP, H. Precision photometry down to M„= F6mag (M3).īaum, W. Color displacement between M 3 and M 92-spectrum differences between M 3 and M 92. First color-magnitude diagram in which main sequence is identified (M 92).īaum, W.

First definition of RR Lyrae gap appears (M 3).Īrp, H. One of the first modern color-magnitude diagrams of a globular cluster (M 92). The application of the theory to globular clusters. R.: Liège Symposium Volume, Les Processus nucléaires dans les astres, p. The first extension of the theory past the 12% limit. The basic idea of initial evolution from the main sequence. One of the most conspicuous features of a Hertzsprung-Russell (H-R) diagram for any group of stars is the diagonal band running from upper left to lower. B.: Proceedings of the National Science Foundation at Charlottesville, Virginia, April 1956. Bolo-metric corrections and temperatures for early-type stars. The fundamental work on the stellar temperature scale and bolometric corrections. The presentation of the fundamental standards of the B, V system. 116, 272 (1952) Exclusion of ultraviolet light from photographic (B) magnitudes. Code: Carnegie Institution of Washington Yearbook, Mt. Chicago, Ill.: Chicago University Press 1943. Morgan, Keenan and Kellman: An Atlas of Stellar Spectra. This Volume discusses the presently challenging problems in astronomy and advancements in instruments and techniques which would be desirable in order to effect their solution. Smithsonian Contributions to Astrophysics, Vol. Discussion of the history of special fields in astronomy, particularly in Sects. London and New York: Pergamon Press 1955. Interpretation of Normal Stellar Spectra by L. Strömgren of developments of astrophysics during the last half centure (pp. New York-TorontoLondon: McGraw-Hill Book Company 1951.Īn historical discussion by B. (Editor): Astrophysics - A Topical Symposium.

Shapley presents his own researches and sums up the information available at the time on clusters, variable stars and distance scales. New York-Toronto-London: McGraw-Hill Book Company 1930. An extremely detailed account of stellar astronomy from its earliest beginnings through to about 1930. Lundmark, K.: Handbuch der Astrophysik, Vol.

Hr diagram