Abundances in five nearby galactic H UFSMCAPSii regions from infrared forbidden lines

Journal Article · Mon Nov 01 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160406· OSTI ID:6236413

Herter, T; Helfer, H L; Pipher, J L; Briotta, Jr, D A; Forrest, W J; Houck, J R; Rudy, R J; Willner, S P

Airborne measurements of the (Ar II) (6.99 ..mu..m) and (S III) (18.71 ..mu..m) lines for five compact H II regions in the solar neighborhood are presented, as well as 2--4 ..mu..m and 8--13 ..mu..m spectroscopy where available. From these data and radio data we deduce lower limits to the elemental abundances of Ar, Ne, and S. Some of these H II regions suffer substantial nebular extinction, and some are extended. After correcting for beam size effects and extinction, we find that four of the objects are consistent with standrd abundances, within the uncertainties of correcting for unobserved ionization states. A Perseus arm object, S156, is apparently overabundant in sulfur.

• Research Organization: Department of Physics and Astronomy, University of Rochester
• OSTI ID: 6236413
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 262:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ARGON
ARGON IONS
CHARGED PARTICLES
COSMIC RADIO SOURCES
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FINE STRUCTURE
FLUIDS
FORBIDDEN TRANSITIONS
GALAXIES
GASES
H2 REGIONS
INFRARED SPECTRA
IONS
MILKY WAY
NEON
NONMETALS
RARE GASES
SPECTRA
SULFUR
SULFUR IONS