Hostname: page-component-7479d7b7d-qlrfm Total loading time: 0 Render date: 2024-07-13T19:25:20.950Z Has data issue: false hasContentIssue false
  • English
  • Français

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

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 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

REFERENCES

Giovanelli, R., Verschuur, G. L., and Cram, T. R. 1973, Astr. Ap. Supp., 12, 209.Google Scholar
Holberg, J. B. 1986, Ap. J., 311, 969.CrossRefGoogle Scholar
Hulsbosch, A. N. M. 1968, Studies of High Velocity Clouds, Dissertation, Leiden Univ. Google Scholar
Hulsbosch, A. N. M. 1975, Astr. Ap., 40, 1.Google Scholar
Kulkarni, S. R., and Fich, M. 1985, Ap. J., 289, 792.Google Scholar
Kutyrev, A. S., and Reynolds, R. J. 1989, Ap. J. Letters, in press.Google Scholar
Meng, S. Y., and Krauss, S. D. 1970, A. J., 75, 535.Google Scholar
Münch, G. 1952, P. A. S. P., 64, 312.CrossRefGoogle Scholar
Münch, G., and Zirin, G. 1961, Ap. J., 133, 11.Google Scholar
Pengelly, R. M. 1964, M. N. R. A. S., 127, 45.Google Scholar
Reynolds, R. J., Roesler, F., and Scherb, F. 1974, Ap. J. (Letters), 192, L53.Google Scholar
Reynolds, R. J., Roesler, F., and Scherb, F. 1977, Ap. J., 211, 115.Google Scholar
Reynolds, R. J. 1980, Ap. J., 226, 153.Google Scholar
Reynolds, R. J. 1984, Ap. J., 282, 191.Google Scholar
Reynolds, R. J. 1987, Ap. J., 323, 553.Google Scholar
Scherb, F. 1981, Ap. J., 243, 644.Google Scholar
Stark, A. A., Bally, J., Linke, R. A., and Heiles, C. 1989, in preparation.Google Scholar
Van Woerden, H., Schwarz, U. J., and Hulsbosch, A. N. M. 1985, in IAU Symposium 106, The Milky Way Galaxy, eds Allen, R. J. et al. (Dordrecht, Reidel), 387.Google Scholar