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III. The Spectral Sequence and its Anomalies

Published online by Cambridge University Press:  25 April 2016

P. Swings  and
J. J. Nassau
J. J. Nassau
Affiliation:
Warner and Swasey Observatory, Case Institute of Technology, Cleveland, Ohio

Extract

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This report deals mainly with the study of spectra secured with a 4° objective prism attached to the 24–36-inch Schmidt-type telescope of the Warner and Swasey Observatory of the Case Institute of Technology. The dispersion at Hγ is 283 A./mm. Spectra obtained with a 2° objective prism will be dealt with briefly. We will consider first spectra secured by means of long exposures intended to be used for statistical studies; second, spectra of relatively short exposures for detailed study of individual stars and, third, infra-red spectra for the classification of low-temperature stars.

Type
Part IV. Symposia
Information
Transactions of the International Astronomical Union , Volume 7 , 1950 , pp. 442 - 456
Copyright
Copyright © Cambridge University Press 1950

References

page no 444 note * J. M., Ramberg, ‘A Spectrophotometric Study of the Regions of the Hyades and Praesepe’, Stockholm Annaler, Band 13, no. 9, 1941 Google Scholar.

page no 444 note † W. M., Smart, ‘The Moving Cluster in Taurus’, M.N. 99, 168, 1939 Google Scholar.

page no 444 note * G. P., Kuiper, ‘On the Hydrogen Content of Clusters’, Ap. J. 86, 176, 1937 Google Scholar.