Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-17T16:02:39.652Z Has data issue: false hasContentIssue false
  • English
  • Français

Mariner 5 measurements of ultraviolet emission from the Galaxy

Published online by Cambridge University Press:  14 August 2015

Charles A. Barth
Charles A. Barth*
Affiliation:
Dept. of Astro-Geophysics, and Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colo., U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The Mariner 5 ultraviolet measurements obtained while the spacecraft was in interplanetary flight are interpreted as Lyman-α radiation. This radiation may arise from (1) the scattering of solar Lyman-α radiation by interplanetary atomic hydrogen, (2) the scattering of solar Lyman-α by atomic hydrogen that is present at the edge of the solar system, or (3) diffusely scattered Lyman-α radiation from the Galaxy. The Mariner 5 measurements show a symmetry with respect to the galactic equator which suggests that the major source of the observed emission is the diffuse galactic radiation. In the Münch model for the diffuse Lyman-α radiation from an HI region, the sources of the Lyman-α photons are stellar chromospheres, the photons are scattered a large number of times by interstellar atomic hydrogen, and are absorbed by interstellar dust. Some of the Mariner 5 measurements may be attributed to Lyman-α emission from an HII region since the field of observation scanned the edge of the Gum nebula.

Type
Part III: Interstellar Absorption and Emission
Information
Symposium - International Astronomical Union , Volume 36: Ultraviolet Stellar Spectra and Related Ground-Based Observations , 1970 , pp. 334 - 340
Copyright
Copyright © Reidel 1970 

References

Barth, C. A., Pearce, J. B., Kelly, K. K., Wallace, L., and Fastie, W. G. 1967, Science 158, 1675.Google Scholar
Barth, C. A., Wallace, L., and Pearce, J. B.: 1968, J. Geophys. Res. 73, 2541.Google Scholar
Gum, C. S.: 1952, Observatory 72, 151.Google Scholar
Kurt, V. G. and Dostovalov, S. B.: 1968, Nature 218, 258.Google Scholar
Münch, G.: 1962, in Space Age Astronomy (ed. by Deutsch, A. J. and Klemperer, W. B.), Academic Press, New York, ch. 10, p. 219.Google Scholar
Patterson, T. N. L., Johnson, F. S., and Hanson, W. B.: 1963, Planet. Space Sci. 11, 767.Google Scholar