Ionization equilibrium in isolated H II regions

Details Ionization equilibrium in isolated H II regions Ionization equilibrium in isolated H II regions

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..244e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 244-250.

Astronomy and Astrophysics

Astronomy

5

Gas Ionization, H Ii Regions, Nebulae, Ultraviolet Astronomy, Absorption Spectra, Galactic Cosmic Rays, Gas Density, Oao 3, Stellar Models, X Ray Sources

Scientific paper

Theoretical ionization equilibrium models are combined with Copernicus ultraviolet observations to study a particular H II region absorption-line component in the spectra of Lambda Sco and Upsilon Sco. The Lambda Sco observations imply that the region is characterized by a hydrogen density of approximately 0.2/cu cm and an extent along the line of sight of approximately 16 pc. Three choices for the relative placement of Lambda Sco and Upsilon Sco are considered. Conclusions are that Lambda Sco is the primary source of ionization and that there is a separation of approximately 5 pc between the H II region and Lambda Sco. Observational data support an enhanced dielectronic recombination rate for S III. Comparison of the Upsilon Sco and Lambda Sco observations suggests that spatial variations of density may be present.

Affiliated with

Also associated with

No associations

Rating

Ionization equilibrium in isolated H II regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ionization equilibrium in isolated H II regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionization equilibrium in isolated H II regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-818948