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Spectrophotometry of M and C Stars

Published online by Cambridge University Press:  14 August 2015

K. Nandy  and
P. Smriglio
K. Nandy
Affiliation:
Royal Observatory, Edinburgh, Scotland
P. Smriglio
Affiliation:
Rome Observatory, Rome, Italy

Abstract and summary

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Surveys of M and C stars down to infrared magnitudes 12.m0 in two galactic regions in the direction Cygnus and anticentre are described. Infrared magnitudes are derived by a new method of calibration based on the use of a combination of crossed calcite plates and Polaroid HN32. Spectral classification is based on spectrophotometric criteria which measure the relative strengths of the molecular bands visible in the infrared in the low dispersion objective prism spectra. Infrared absolute magnitudes and interstellar extinction in the infrared are obtained from the present material and published data, and the space densities of M stars are determined.

Full accounts have been published in Publ. Edinburgh Roy. Obs.7, 1 (1970) and 7, 73 (1971).

Type
Part II: Classification of Objective-Prism Spectra
Information
Symposium - International Astronomical Union , Volume 50: Spectral Classification and Multicolour Photometry , 1973 , pp. 95
Copyright
Copyright © Reidel 1973