Abstract
We have studied the variation of the electron density with position in a selected group of bright giant extragalacticHII regions with the use of long slit spectrophotometry at high spectral and spatial resolution. Density values for the ionized gas of the regions have been obtained from the measurement of the [SII] λλ6717, 6731 ratio. We conclude that the regions are not homogeneous; the density varies with position, with the zones of high density frequently associated to high surface brightness.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Castañeda, H. O., Vilchez, J. M., and Copetti, M. V. F.: 1990 (in prep.).
Mendoza, C.: 1983, in D. R. Flower (ed.), ‘Planetary Nebulae’,IAU Symp. 103, 143.
O'Dell, C. R. and Castañeda, H. O.: 1984,Astrophys. J. 283, 158.
Osterbrock, D. E. and Flather, E.: 1959,Astrophys. J. 129, 26.
Skillman, E. D.: 1985,Astrophys. J. 290, 449.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Castañeda, H.O., Vilchez, J.M. Density studies of giant extragalacticHII regions. Astrophys Space Sci 171, 203–205 (1990). https://doi.org/10.1007/BF00646847
Issue Date:
DOI: https://doi.org/10.1007/BF00646847