The C-12/C-13 abundance ratio derived from H2CO observations of southern sources

Details The C-12/C-13 abundance ratio derived from H2CO observations of southern sources The C-12/C-13 abundance ratio derived from H2CO observations of southern sources

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188..331g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 188, Aug. 1979, p. 331-341.

Astronomy and Astrophysics

Astronomy

24

Abundance, Carbon 12, Carbon 13, Formaldehyde, Interstellar Gas, Absorption Spectra, Molecular Spectra, Radio Astronomy, Southern Hemisphere

Scientific paper

The 1(11)-1(10) transitions of H2(C-13)O and H2(C-12)O have been observed in a total of 24 molecular clouds with the Parkes 64-m radio telescope. H2(C-13)O absorption has been detected in the nuclear disk and the '4-kpc expanding arm'. It is concluded that, at least for small optical depths, the H2(C-12)O/H2(C-13)O abundance ratio is close to the C-12/C-13 abundance ratio. It is found that the mean ratio varies with galactocentric distance. At the solar distance the ratio equals the solar (and terrestrial) value of 89; for smaller galactocentric distances (0.2-8 kpc) the ratio is lower (averaging 40-50), while it is still lower (20-30) for the sources Sgr A and Sgr B2 near the center.

Affiliated with

Also associated with

No associations

Rating

The C-12/C-13 abundance ratio derived from H2CO observations of southern sources 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 C-12/C-13 abundance ratio derived from H2CO observations of southern sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The C-12/C-13 abundance ratio derived from H2CO observations of southern sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1486285