Interstellar S isotopes (Chin+, 1996)

Details Interstellar S isotopes (Chin+, 1996) Interstellar S isotopes (Chin+, 1996)

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..33050960c&link_type=abstract

VizieR On-line Data Catalog: J/A+A/305/960. Originally published in: 1996A&A...305..960C

Computer Science

Radio Lines

Scientific paper

A 12C32S, 13C32S, 12 has been made to study interstellar 32S/34S and 34S/33S ratios from the galactic disk. The four CS isotopomers were detected in 20 star forming regions with galactocentric distances between 3 and 9kpc. From a comparison of line velocities, the C33S J=2-1 rest frequency is ~250kHz below the value given in the Lovas (1992) catalog. Taking 12C/13C ratios from Wilson & Rood (1994) and assuming equal 12C32S and 13C32S excitation temperatures and beam filling factors, 12C32S opacities are in the range 3 to 15; average 32S/34S and 34S/33S isotope ratios are 24.4+/-5.0 and 6.27+/-1.01, respectively. While no systematic variation in the 34S/33S isotope ratio is found, the 32S/34S ratio increases with galactocentric distance when accounting for the 12C/13C gradient of the galactic disk. A fit to the unweighted data yields 32S/34S=3.3+/-0.5(DGC/kpc)+4.1+/-3.1 with a correlation coefficient of 0.84. Since the interstellar sulfur (S) isotopes are synthesized by oxygen burning in massive stars, consequences for nucleosynthesis and models of chemical evolution are briefly discussed. (1 data file).

Affiliated with

Also associated with

No associations

Rating

Interstellar S isotopes (Chin+, 1996) 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 Interstellar S isotopes (Chin+, 1996), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstellar S isotopes (Chin+, 1996) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-991905