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Measurement of interstellar extinction in emission line stars

Published online by Cambridge University Press:  14 August 2015

R. Viotti
R. Viotti*
Affiliation:
Laboratorio di Astrofisica, Frascati, Italy

Extract

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Usually selective interstellar extinction is derived by comparing the spectrum of a reddened star with an unreddened nearby star, preferably of the same spectral type. But in many cases this comparison is not possible, so that new methods have to be used.

A direct measure of this quantity is possible when a spectrum shows a number of emission lines as for the peculiar stars (novae, nova-like objects, symbiotic stars, etc.) and for nebulae. From a statistical point of view there are a small number of objects but they are of very high interest as far as stellar evolution is concerned.

Type
Part I: Stellar Fluxes
Information
Symposium - International Astronomical Union , Volume 36: Ultraviolet Stellar Spectra and Related Ground-Based Observations , 1970 , pp. 50 - 51
Copyright
Copyright © Reidel 1970 

References

Caputo, F., Panagia, N., and Gerola, H.: 1970, Astrophys. J. (in press).Google Scholar
Pagel, B. E. J.: 1969, Nature 221, 325.Google Scholar
Viotti, R.: 1969, Rome University, Italy.Google Scholar