Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...79..469h&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 79, no. 2, April 1992, p. 469-480. Research supported by Lowell R
Astronomy and Astrophysics
Astrophysics
23
Astronomical Photometry, Astronomical Spectroscopy, H Ii Regions, Interstellar Gas, Ionized Gases, Abundance, Charge Coupled Devices, Emission Spectra
Scientific paper
Narrow-band H-alpha and N II images and long-slit and aperture spectroscopy are presented for a sample of small Galactic H II regions located from 6 to 15 kpc from the Galactic center. Emission-line fluxes are measured from H-beta to S II 6717,31 for selected areas throughout each nebula. Reddening is determined from the ratio of H-alpha to H-beta and density from the ratio of the S II lines. Abundances of S(+), N(+), and O(2+) relative to H(+) are determined for those regions for which electron temperatures exist in the literature. Variations of O III/H-beta, N II/H-alpha, S II/H-alpha, and N II/S II within the nebulae and from nebula to nebula as a function of distance from the enter of the Galaxy are examined. The status of the H II regions and their relationship to the molecular clouds are briefly discussed. These data provide a useful data base for studies of the interaction between H II regions and their natal clouds, studies of the evolution of H II regions, and studies of variations of elements and physical conditions within the Galaxy.
No associations
LandOfFree
Small Galactic H II regions. III - Images and spectrophotometry of the ionized gas 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 Small Galactic H II regions. III - Images and spectrophotometry of the ionized gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small Galactic H II regions. III - Images and spectrophotometry of the ionized gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1733989