H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds.

Details H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds. H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds.

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..109..333p&link_type=abstract

Astronomy and Astrophysics Suppl. 109, 333-340 (1995)

Astronomy and Astrophysics

Astrophysics

11

Stars: Formation, Ism: Clouds, Ism: Molecules, Radio Lines: Ism

Scientific paper

The results of the observations of several galactic dense molecular cloud cores in the J=1-0 H^13^CN, H^13^CO^+^, HCN and HCO^+^ lines along with the J=1-0 HCN observations of some high-latitude clouds are presented. In the optically thin approximation the H^13^CN and H^13^CO^+^ column densities (N) are evaluated. HCN and HCO^+^ column densities are derived from N(H^13^CN) and N(H^13^CO^+^) using the [^12^C]/[^13^C] ratios for each cloud calculated from its galactocentric dependence. HCN abundances are found for two objects. The H^13^CO^+^, HCO^+^ and HCN emission region sizes are estimated for some cores. HCO^+^ and H^13^CO^+^ model calculations for S140 show that either the [HCO^+^]/[H^13^CO^+^] abundance ratio is rather low, ~30, or the object has inhomogeneous structure. The J=1-0 HCN line was detected towards MBM 55B high-latitude cloud. HCN column density in this source is N(HCN)>=10^11^cm^-2^, the HCN abundance is X(HCN)>10^-10^.

Affiliated with

Also associated with

No associations

Rating

H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds. 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 H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and H^13^CN, H^13^CO^+^, HCN and HCO^+^ observations of dense gas in galactic molecular clouds. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1629330