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The Problem of the 2200 Å Feature

Published online by Cambridge University Press:  12 April 2016

K. Nandy
K. Nandy*
Affiliation:
Royal Observatory, Edinburgh

Extract

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In my earlier work (Nandy, 1977) I have described an ultraviolet photometric system which involves a two dimensional stellar classification. This system is based on constructing broad band (Δλ ≈ 100 Å) ultraviolet colors (m2700 - V), (m2190 -m2740) and (m1500 - V) from the low dispersion S2/68 spectra. This photometric system is suited ideally to extend the classification to stars fainter than V = 6m.0, because the spectral features as described by the previous speaker, A. Cucchiaro, are not easily identifiable in these spectra.

Type
VIII Space Spectroscopy and Future Developments in Classification
Information
International Astronomical Union Colloquium , Volume 47: Spectral Classification of the Future , 1979 , pp. 457 - 459
Copyright
Copyright © Vatican Observatory 1979

References

Nandy, K. (1977). Highlights of Astronomy, 4, Part II, 289.Google Scholar
Nandy, K. and Morgan, D. H. (1978). Nature, (in press).Google Scholar
Rousseau, J., Martin, N., Prevat, L., Robbeird, E., Robin, A. and Brunet, J.P. (1978). Astron. and Astrophys. Suppl., 31, 243.Google Scholar
Thompson, G.I., Nandy, K., Jamar, C., Monfils, A., Houziaux, L., Camochan, D. and Wilson, R. (1978). Catalogue of Stellar Ultraviolet Fluxes (to be published by the Science Research Council, U.K.).Google Scholar