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Detection of Hα Emission on High Velocity 21 cm Clouds

Published online by Cambridge University Press:  08 February 2017

Guido Münch  and
Eckhart Pitz
Guido Münch
Affiliation:
Max-Planck-Institut für Astronomie Königstuhl, 6900 Heidelberg FRG
Eckhart Pitz
Affiliation:
Max-Planck-Institut für Astronomie Königstuhl, 6900 Heidelberg FRG

Abstract

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The measurement of Hα emission on two high galactic latitude clouds known to emit 21 cm lines with local standard of rest (LSR) velocities of −50 and −85 km s−1 is reported. The Hα lines have been found nearly at the velocities of the 21 CM features and have emission rates of 0.2 Rayleigh. The diffuse Lyman continuum intensity required to produce HI ionization at the measured rate is in agreement with the direct measurements made with the ultraviolet (UV) spectrometer of the Voyager 2 spacecraft.

Type
III. Diffuse Galactic Radiation from Dust and Gas: Observations and Models
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 193 - 198
Copyright
Copyright © Kluwer 1990 

References

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