Abundance of argon at the galactic center

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159177· OSTI ID:5882652

Lester, D F; Bregman, J D; Witteborn, F C; Rank, D M; Dinerstein, H L

Measurements of (Ar II) 6.99 ..mu..m and Pf..cap alpha.. 7.45 ..mu..m made from the Kuiper Airborne Observatory are presented for Sgr A, the H II region at the center of the Galaxy. These line strengths, when combined with ground-based measurements, suggest a factor of 2 enhancement in the Ar/H ratio in the galactic center region relative to that in the Sun and in the solar neighborhood. The accuracy of the determination is presently limited by the uncertainty in the collision strength for Ar/sup +/.

• Research Organization: Ames Research Center, NASA
• OSTI ID: 5882652
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 248:2; 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
CHEMICAL COMPOSITION
COSMIC RADIO SOURCES
ELEMENTS
FLUIDS
GALAXIES
GALAXY NUCLEI
GASES
H2 REGIONS
HYDROGEN
IONS
MILKY WAY
NONMETALS
RARE GASES
SPECTRA
VISIBLE SPECTRA