The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium

Details The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242.1005w&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Dec. 15, 1980, p. 1005-1012.

Astronomy and Astrophysics

Astronomy

22

Abundance, Emission Spectra, Interstellar Matter, Silicon Isotopes, Silicon Oxides, Brightness Temperature, Galactic Evolution, Millimeter Waves, Nebulae, Optical Thickness, Radio Antennas, Radio Sources (Astronomy)

Scientific paper

Millimeter-wave observations of the J = 2 → 1 (υ=0) rotational transition of 28SiO and the isotopically substituted species 29SiO and 30SiO have been made toward four dense molecular clouds. Additional observations of the J = 3 → 2 (υ=0) transition of 28SiO toward the same clouds were also made. The results are utilized to derive relative isotopic abundances in the interstellar medium. It is shown that [29Si/28Si] and [30Si/28Si] are significantly larger than the terrestrial values, whereas the terrestrial and interstellar [30Si/29Si] abundance ratios are comparable provided all lines are optically thin. No evidence for variation of isotope abundance with galactic radius is found.

Affiliated with

Also associated with

No associations

Rating

The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium 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 The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The relative abundances of Si-28, Si-29, and Si-30 in the interstellar medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-753855