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The Problem of the UV Interstellar Absorption Band at 2200A

Published online by Cambridge University Press:  25 September 2017

D.J. Carnochan ,
K. Nandy ,
A.J. Willis  and
R. Wilson
D.J. Carnochan
Affiliation:
Dept. of Physics and Astronomy, University College, London Gbwer Street, London, WC1
K. Nandy
Affiliation:
Dept. of Physics and Astronomy, University College, London Gbwer Street, London, WC1
A.J. Willis
Affiliation:
Dept. of Physics and Astronomy, University College, London Gbwer Street, London, WC1
R. Wilson
Affiliation:
Dept. of Physics and Astronomy, University College, London Gbwer Street, London, WC1

Extract

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The ultraviolet interstellar extinction curve from 2740Å to 1350Å has been obtained using data from the S2/68 satellite experiment. The extinction increases into the ultraviolet and shows a pronounced peak at 2200Å. This is interpreted as a general scattering continuum with a strong absorption feature superposed on it at 2200Å. The profile of the feature appears to be symmetrical and has a half-width of 360Å. There is a strong correlation between the strength of the feature and the scattering part of the curve in both the ultraviolet and the visible. On a broad scale the shape of the extinction curve is constant showing no variation with distance from the sun, direction around the galaxy, and height above the galactic plane.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 43: Vth Conference on UV & X-Ray Spectroscopy of Astrophysical & Laboratory Plasmas , July 1977 , pp. 26
Copyright
Copyright © Crown Research Institutes 1977